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What is the role of powdered activated carbon in water treatment0dingxinda92021-03-01 01:04:46
Generally, activated carbon for water treatment is nothing more than nut shell activated carbon, coconut shell activated carbon, powdered activated carbon, and columnar activated carbon. These types of activated carbon can be used in water treatment, which can play a role in deep purification of water quality. Filter tanks use granular activated carbon to purify water. Compared to if shell activated carbon, coconut shell activated carbon and coal columnar activated carbon, this type of activated carbon has strong adsorption capacity and low ash content.  bulk activated charcoal pellets   Another point is that it can be filled into the container to filter and use. More convenient. Powdered activated carbon is suitable for the purification and decolorization of colored sewage. When the water is colored, granular activated carbon can remove part of the color, but it is difficult to remove it completely. At this time, powdered activated carbon is needed for treatment. The powdered activated carbon has a huge pore structure that can absorb the colors in the water while also adsorbing organic matter and harmful bacteria in the water. activated coconut charcoal powder It is just that the powdered activated carbon needs to be added when it is used. After thorough mixing, the filtered powdered activated carbon is finally removed. The procedure is more cumbersome compared to other activated carbons. However, the purification and decolorization ability of powdered activated carbon is much better than that of other activated carbons. Generally, powdered activated carbon is used for decolorization of food, wine, and medicine. 
How does activated carbon play a role in modern water treatment?0dingxinda92020-10-16 00:24:38
Activated carbon filtration is one of many processes commonly used in water treatment to remove contaminants such as organic materials, and since it also can remove odor-causing contaminants, it’s often used to make drinking water more palatable.ningxia activated carbon The first known carbon filtration devices date back to ancient Minonan Crete.The water was carried through a 3-km aqueduct, and several cone-shaped terra cotta filters filled with charcoal were discovered in the system. Activated carbon filter technology has improved with time, and today the activated carbon market is predicted to grow, with water treatment driving the growth, although the COVID-19 pandemic has introduce some uncertainty in activated carbon market predictions. Activated carbon is frequently chosen for potable water applications because it efficiently adsorbs synthetic organic chemicals, PFAS, chlorine, compounds that affect smell and taste, and naturally occurring organic compounds. As pollution and contamination gets worse, particularly in the developing world, activated carbon filtration is poised to grow. Water treatment plant operators have two choices when using granular activated carbon filtration,Retrofitting an existing multimedia filter — typically a bed filter — by replacing its medium, or installing a new filter. Both methods require calculations of bed depth, water flow, and other factors. Operators must also allow for seasonal changes in water that may mean more frequent backwash is required. Granular activated carbon can be reactivated through thermal oxidation, which allows it to be used multiple times. Granulated activated carbon filtration can be used on its own or paired with other technologies for disinfection or other processes to achieve desired water quality. For example, it can be used with ozone in a treatment known as a biological activated carbon process. Researchers continue studying the medium, which is still being widely applied in a variety of applications, for instance, activated carbon used with coagulation and filtration for advanced wastewater treatment. A granulated activated carbon unit is most often placed in a water treatment plant after conventional filtration processes, or after a process such as flocculation and sedimentation, according to the U.S. Environmental Protection Agency.www.activated-carbon-pellets.com 
Wastewater treatment technology of powdered activated carbon02020-10-27 01:05:13
Powdered Activated Carbon Treatment (PACT) is a wastewater technology in which powdered activated carbon is added to an anaerobic or aerobic treatment system.carbon activated manufacturer  The carbon in the biological treatment process adsorbs recalcitrant compounds that are not readily biodegradable, thereby reducing the chemical oxygen demand of the wastewater and removing toxins.The carbon also acts as a "buffer" against the effects of toxic organics in the wastewater. In such a system, biological treatment and carbon adsorption are combined into a single, synergistic treatment step.The result is a system which offers significant cost reduction compared to activated sludge and granular carbon treatment options. The addition of the powdered activated carbon stabilizes biological systems against upsets and shock loading, controls color and odor, and may reduce disposal costs while removing soluble organics. In an aerobic treatment system, influent first enters an aeration tank where the powdered carbon is added, making up a portion of mixed liquor suspended solids. pellets activated carbon Once the aeration is completed, the treated wastewater and the carbon-biomass slurry are allowed to settle.In cases where complete solids separation is needed, such as for reuse, an MBR may be used in place of the clarifer. Following treatment, a portion of the carbon and biomass slurry is wasted to solids handling. Due to the presence of the powdered activated carbon, the sludge settles, thickens, and dewaters better compared to conventional activated sludge processes. These solids can be wasted and disposed of as a slurry, dewatered to a compact, stable cake, or pumped as a slurry to a wet air oxidation unit for further processing to regenerate the carbon and destroy the biological solids.
Water treatment of activated carbon02021-04-26 00:52:37
Activated carbon can realize desulfurization and denitration at the same time, no secondary pollution and renewable utilization of resources.At present, the adsorption device of activated carbon adsorption process reported in the literature is mainly fixed bed, and this process has the disadvantages of large equipment, large bed resistance, poor continuity and so on.activated charcoal wholesale uae  In this paper, the activated carbon desulfurization and denitration test bed, with the circulating fluidized bed as the main adsorption device, the activated carbon desulfurization and denitration test study.Circulating fluidized bed flue gas purification technology can effectively avoid the shortcomings of the fixed bed adsorption process, such as complex equipment, large space occupied, and unstable bed resistance, etc., and the good cooperation with the bag filter can achieve the continuity of activated carbon adsorption and regeneration.yrdcarbon.com   In this paper, the removal of SO2 and NO from flue gas by wood powdered activated carbon was studied in a pilot scale test rig.Some factors affecting the efficiency of desulfurization and denitration were analyzed through experiments, and economic analysis was made on the technology of combined desulfurization and denitration with activated carbon. So it is widely used in the world sewage and waste gas treatment, air purification, recovery of rare metals and solvents and other environmental protection and resource recovery and other fields.Activated carbon is divided into granular activated carbon, powder activated carbon and activated carbon fiber, but because the powder activated carbon has secondary pollution and cannot be regenerated and activated, it is limited to use GAC-granular activated carbon (granular activated carbon)85%~90% of GAC is used for water treatment and gas adsorption treatment, and its particle size is 500~ 5000U m. The pore structure of GAC is generally a tridisperse pore distribution, which has been obtained according to the International Society of Pure and Applied Chemistry(IUPAC) Classification Aperture >Large pores at 50nm, intermediate pores at 2.0~50nm and lt; 
Water treatment and purification of activated carbon02021-04-26 00:51:48
Because activated carbon has numerous small pores, large surface area, strong adsorption capacity, can adsorb a variety of organic compounds, widely used in pharmaceutical industry and chemical industry.alumina fused grit  Especially in the field of medicine, activated carbon, as a highly effective gastrointestinal cleaning agent, can effectively adsorb pesticide residues, fungicides, heavy metals, dioxins, various pathogenic bacteria and toxins in the digestive tract and human body that damage human health or cause disease wastes, harmless to human body.hsl abrasives  With the rapid develIn 1916, Langmuir studied the adsorption of monolayer molecules and proposed the Langmuir adsorption isotherm equation.Freundlich and Zsigmondy proposed the capillary condensation theory for gas adsorption and obtained the semi-empirical Freundlich adsorption isotherm equation.Temkin also suggested a semi-empirical isothermal equation. Based on Gibbs equation, Toth used dimensionless function V to derive another adsorption isotherm equation for heterogeneous surfaces.Fowler and Guggenhein derived a formula of the same form from the concept of statistical mechanics.Goldmann and Polanyi proposed the adsorption space theory, which believed that the continuous decrease in the molecular density of multiple layers on the surface of the adsorbent was caused by the weakening of the adsorption molecular force pment of pharmaceutical preparation industry and primary molecular material industry, the microencapsulated activated carbon products coated with polymer materials have been successfully trial-produced in foreign countries, and applied in clinical practice, the medical care and treatment effect is very good, many of them have been put into the market, and have achieved good economic and social benefits. It is worth noting that there is a shortage of activated carbon in China. For a long time, the production of drugs using activated carbon as raw materials has been kept in the laboratory, and no products have been marketed or used in clinical trials. 
Water treatment of bulk activated carbon02021-04-26 00:53:49
Activated carbon can realize desulfurization and denitration at the same time, no secondary pollution and renewable utilization of resources.At present, the adsorption device of activated carbon adsorption process reported in the literature is mainly fixed bed, and this process has the disadvantages of large equipment, large bed resistance, poor continuity and so on.alumina fused grit  In this paper, the activated carbon desulfurization and denitration test bed, with the circulating fluidized bed as the main adsorption device, the activated carbon desulfurization and denitration test study.Circulating fluidized bed flue gas purification technology can effectively avoid the shortcomings of the fixed bed adsorption process, such as complex equipment, large space occupied, and unstable bed resistance, etc., and the good cooperation with the bag filter can achieve the continuity of activated carbon adsorption and regeneration.hsl abrasives   In this paper, the removal of SO2 and NO from flue gas by wood powdered activated carbon was studied in a pilot scale test rig.Some factors affecting the efficiency of desulfurization and denitration were analyzed through experiments, and economic analysis was made on the technology of comAfter adsorption equilibrium was achieved in the adsorption capacity remained at 3.6 mg lL above, grapefruit peel activated carbon adsorption of ammonia followed pseudo second order kineticmodel of the process; by the Henry equation and Freundlich equation with correlation coefficient R'known, Henry isotherm models and Freundlich isotherm models can be used for the des Cription ofgrapefruit peel on the ammonia adsorption characteristics of activated carbon; ammonia initialconcentration,dosage, pH and temperature on the ammonia adsorption are affected, litle effect oftemperature on adsorption. (3) Adsorption at adsorption equilibrium was achieved after 3h, the adsorption capacityremained at 300 mg/kg above, grapefruit peel activated carbon adsorption of phosphate follows thequasi-second order kinetic model; Freundlich R'correlation coefficients were significant, therefore,grapefruit peel activated carbon adsorption of phosphorus found Freundlich isotherm model;initialconcentration, dosage, pH and adsorption temperature on adsorption of phosphorus are affected, pH onthe adsorption of non- large. (4) Adsorption at adsorption equilibrium was achieved after 14h, the adsorption capacityremained at 21.5 mg / g above. Grapefruit peei activated carbon Cr () in the adsorption processfollowed pseudo second order kinetic model; by the Langmuir equation and Freundlich equation of thecorrelation coefficient R' known,consistent with Langmuir isotherm model and the Freundlichisotherm model.Using Langmuir isotherm model to analyze the experimental data obtained in thesolution pH 4, the maximum adsorption capacity was 26.25mg / g;Freundlich isotherm model using 
What are the types of activated carbon for water treatment0dingxinda92021-03-22 00:29:14
Water purification activated carbon products have the characteristics of developed pore structure, large specific surface area, strong adsorption capacity, low impurity content, and repeated use of regeneration.   Activated carbon special for water purification is widely used in the deep purification of drinking water, industrial circulating water, circulating water from power plant boilers, electronics industry, beverages, and food industries.powdered carbon activated  It has a good effect on water purification. It can not only remove peculiar smell and improve the purity of water, but also has a high removal rate of various impurities in water such as chlorine, phenol, arsenic, lead, cyanide, pesticides and other harmful substances. It can be widely used to fill all kinds of large, medium and small water purifiers. It is also suitable for the decolorization and refining of sugar and refreshing drinks, as well as the purification of indoor air, especially activated carbon loaded with special ingredients, which is harmful to indoor harmful gases such as ammonia. , Formaldehyde, etc., has a good purification effect.   Classification of activated carbon for water treatment: Granular activated carbon: According to different materials, it can be divided into coconut shell activated carbon, nut shell activated carbon and coal-based activated carbon.www.wyactivatedcarbon.com  In general, which kind of activated carbon for water purification can be used, the final choice depends on factors such as the requirements for water quality and the scale of the water plant. Don't choose the expensive one, just choose the right one.   Nutshell activated carbon: The raw materials of nutshell activated carbon are generally peach shells, apricot shells, coconut shells and other shells. Among them, coconut shell activated carbon is the best. It is the adsorption speed, adsorption capacity, strength and other indicators are far more than other activated carbon, generally used for drinking water treatment, sugar, beverage decolorization, fish farming aquarium water purification, deodorization, pharmaceutical industry Purification, decolorization, deodorization, purification and as a catalyst directly added to the product.   Powdered activated carbon: generally used wood chips, coal as raw materials, carbonization, activation, grinding and other processes, mainly used in static adsorption operation to treat water deodorization, deodorization and small-scale industrial or urban sewage treatment, generally used as Deep processing use. 
Treatment of water with column activated carbon02020-12-24 23:49:03
1. Activated carbon-sand filter double-layer filter material filter, that is, columnar activated carbon replaces part of the sand filter material in the original sand filter. Charcoal-sand double-layer filter media. honeycomb activated carbon  After the adsorption of the carbon layer and the filtering use of the sand layer, it can effectively remove organic pollutants in the water. It can also remove ammonia. In order to meet the requirements of filtration and adsorption, it is common to spread 12×40 mesh or 8×30 mesh activated carbon (active carbon mesh) on a sand layer tens of centimeters thick. The activated carbon layer with a thickness of 40cm is sufficient to remove organic matter, which can reduce the amount of chlorine required and eliminate odors. And it has the talent to remove pesticides and other organic matter, and the service life is 0.5 to 5 years. 2. Use columnar activated carbon to replace all sand filter materials in the sand filter to make honeycomb activated carbon for adsorption and filtration purposes. 3. Separate activated carbon pool after the fast filter. That is, the GAC filter is arranged behind the sand filter. Hold a secondary filtration. The sand filter must cut off the alum. The activated carbon pool adsorbs organic matter, phenol and odor.www.wyactivatedcarbon.com  Compared with the above two processes, the cost of capital construction of a single activated carbon pool is higher. But it can use more activated carbon adsorption, lower operating costs, easy to change activated carbon, and can more effectively remove TOC, volatile organic compounds and special organic compounds.
Coconut shell activated carbon for water treatment0CLMnb2021-04-05 18:56:25
Under certain operating conditions, the gas mixture by adsorption bed, adsorption by adsorption, adsorption after a period of time, when starting from the adsorbent in the laminar flow of the gas adsorbed mass (or its concentration reaches a specified value), think bed fire, adsorption properties of adsorbent adsorption quantity at this time is called dynamic activity of adsorbent.The activity is not only related to the characteristics of adsorbents and adsorbents, but also related to temperature, concentration and operating conditions.The kinetic activity value of adsorbent is the main basis for the design of adsorption system.The purification efficiency of activated carbon adsorption method is 99.2%~99.3%. For the treatment of large air volume and low concentration of organic waste gas, it is agreed that this method is the most mature and reliable technology at home and abroad, but the T art process is too long, the operation cost is high, and it is often more difficult to need a stable steam source. In view of these problems, combined with the characteristics of this graduation design and only body requirements, the use of activated carbon fixed bed adsorption system for industrial organic waste gas purification, the selection of honeycomb activated carbon as adsorbent.The process system is compact and integrated with adsorption and desorption. The waste gas produced in the production process, mainly of benzene, toluene, xylene, etc., according to the nature of benzene class, this scheme adopts the active carbon as adsorbent to absorb the waste gas, the adsorption bed configuration 2 sets of above commonly, use rotation, when one adsorption bed adsorption of organic adsorption amount of reach regulation, change to another Ⅰ adsorption bed for adsorption purification operation, at the same time to take off one in front of the adsorption bed with regeneration.Desorption is carried out by heating under the action of additional steam, and most of the hotgas released by the tail gas is used for desorption and regeneration of adsorbent in the adsorption bed to achieve the utilization of waste heat.The waste gas volatilized from production is sent to the adsorption tower by centrifugal fan with activated carbon as adsorbent. The gas in the tower is processed through the activated carbon filter layer from right to left and from bottom to top, and the purified gas is discharged into the atmosphere through the exhaust pipe.  The adsorption rateThe adsorption process often takes a long time to reach equilibrium, and the contact time is limited in the actual production process.Therefore, the amount of adsorption depends on the adsorption rate, and the adsorption rate is related to the adsorption process, the adsorption process can be divided intoThe adsorption process often takes a long time to reach equilibrium, and the contact time is limited in the actual production process.Therefore, the amount of adsorption depends on the adsorption rate, and the adsorption rate is related to the adsorption process, which can be divided into the following steps: (1) External diffusion, the adsorbate from the main air flow through the air film around the particles to the outer surface of the adsorbent; (2) Internal diffusion, the adsorbate from the outer surface through micropores to the surface of the adsorbent micropores (3) adsorption, the adsorbent reached the microporous surface of the adsorbent is adsorbed (4) The desorbed adsorbate diffuses to the main body of the gas phase through internal and external diffusionPhysical adsorption process is generally controlled by internal and external diffusion, chemical adsorption is controlled by both surface dynamics and internal and external diffusion.Because of the complexity of the adsorption process and many influencing factors, it is difficult to derive the rate theoretically, so it is generally determined by experience or model experiment. The purification efficiency of activated carbon adsorption method is 99.2%~99.3%. For the treatment of large air volume and low concentration of organic waste gas, it is agreed that this method is the most mature and reliable technology at home and abroad, but the T art process is too long, the operation cost is high, and it is often more difficult to need a stable steam source.activated carbon suppliers in china  In view of these problems, combined with the characteristics of this graduation design and only body requirements, the use of activated carbon fixed bed adsorption system for industrial organic waste gas purification, the selection of honeycomb activated carbon as adsorbent.The process system is compact and integrated with adsorption and desorption.activated carbon for gold mining  The waste gas produced in the production process, mainly of benzene, toluene, xylene, etc., according to the nature of benzene class, this scheme adopts the active carbon as adsorbent to absorb the waste gas, the adsorption bed configuration 2 sets of above commonly, use rotation, when one adsorption bed adsorption of organic adsorption amount of reach regulation, change to another Ⅰ adsorption bed for adsorption purification operation, at the same time to take off one in front of the adsorption bed with regeneration.Desorption is carried out by heating under the action of additional steam, and most of the hotgas released by the tail gas is used for desorption and regeneration of adsorbent in the adsorption bed to achieve the utilization of waste heat.The waste gas volatilized from production is sent to the adsorption tower by centrifugal fan with activated carbon as adsorbent. The gas in the tower is processed through the activated carbon filter layer from right to left and from bottom to top, and the purified gas is discharged into the atmosphere through the exhaust pipe. 
Activated carbon for domestic water purification treatment02021-04-17 01:03:32
Activated carbon has a wide range of applications: air purification, the production of air filters, can absorb and filter the air in 03 S02 NO2 and odor, gas, smoke and other harmful gas rest, can be used for room, kitchen utensils and other polluted indoor air purification;activated carbon factory  Water purification, can remove the organic matter and heavy metal ions and mildewy odor, bacteria and used in water decolorization, used in drinking water industry, beverage, beer, medicine, sugar and other industries water purification, decolorization process and pure water, direct drinking water production equipment; coconut activated carbon factory   Sewage treatment: can be used to treat the chemical industry, electroplating, metallurgy, printing and dyeing, leather, medicine and other sources of sewage, the removal of organic materials, bacteria and organic dyes in the water.Especially the treatment of toxic and harmful wastewater containing high metal ions;Organic solvent recovery: to benzene, ketone, fat, alcohol and other types of organic solvents can be adsorbed recovery;It can be used in solvent recovery devices such as glue spray paint and film, in benzene purification and recovery devices and in environmental protection projects of waste gas and sewage treatment.Health and anti-expansion: made of gas masks, gas and dust masks, gas jackets can have good adsorption and shielding effect on toxic gases; Medical treatment and biological engineering: can be used for the manufacture of artificial kidney, liver adsorbent, used in biological engineering for enzyme fixation; Daily life: can be used in refrigerator deodorization, fruit and vegetable preservation, household water purifier, cigarette filter, deodorization and disease prevention insoles and other daily necessities production;Other aspects: can be used as catalyst carrier, stationary phase of gas chromatography, solar heat collector and the production of precious metals (Ag andMarket demand forecastActivated carbon has a wide range of applications: air purification, the production of air filters, can absorb and filter the air in 03 S02 NO2 and odor, gas, smoke and other harmful gas rest, can be used for room, kitchen utensils and other polluted indoor air purification; 
Ding Xinda activated carbon adaptive water treatment02021-11-18 23:57:19
Industry should beActivated carbon also requires high mechanical strength, good wear resistance, its structure is stable, small energy required for adsorption, in order to be conducive to ellets wholesale regeneration.Activated carbon for oilDecolorization, deodorization, gas separation, solvent recovery and air conditioning of fat, beverage, food and drinking water, used as catalyst or adsorbent for body and gas mask.Physical characteristics:Activated carbon is a kind of multi-aperture carbonization, has a very rich pore structure, has good adsorption characteristics, its adsorption by physical and chemicalAbsorbed from the force, the appearance of the color and lustre is black.Its composition in addition to the main carbon, but also contains a small amount of hydrogen, nitrogen, oxygen, its structure is shaped like a hexagon, due to the irregular hexagon structure, determine the characteristics of its body also incandescentand high surface area, each gram of activated carbon has the equivalent of 1000 square meters than the surface. china active carbon/ activated carbon At present, China consumes 250 million MR of wood annually, and imports 3 billion US dollars of wood and forest products annually to make up for the shortage.In order to ensure the fundamental interests of China's forestry enterprises, extend the industrial chain of wood processing products, and promote the development of China's timber industry to the efficient utilization of wood based on the deep processing of products and the comprehensive utilization of raw materials, it has become the pursuit of China's forestry industry Water rice only previews downloaded documents in HD without watermark The target of the.Yakeshi city junxi wood industry co., LTD. To meet the needs of market development, actively develop wood waste processing projects, has made the enterprise in technology, management, personnel with a strong development potential. 
Guidelines for water purification treatment and industry requirements for activated carbon02021-09-23 23:08:29
Activated carbon (AC) is a kind of porous carbon material with developed pore structure and large specific surface area, which is prepared by using biological organic matter (such as wood, coke, petroleum coke, coal and various nut shells, etc.). It is a kind of high quality adsorbent. With the development of industry, its application is more and more extensive.powdered activated carbon supplier  At present, it has been widely used in the field of environmental protection, food industry and medicine. Industry, agriculture and many other fields.activated carbon pellets wholesale   In recent years, one of the research hotspots of activated carbon is to use cheap agricultural and forestry wastes as raw materials and simple and clean process to prepare biomass activated carbon with high economic benefit and good adsorption performance. If the agricultural and forestry wastes are effectively utilized and turned into treasures, it can not only create certain economic benefits, but also reduce its pollution to the environment, and achieve the purpose of treating waste with waste. In this paper, using biomass (corn cob, rice husk and peanut shell) as raw material, the experimental research on the preparation of activated carbon from biomass was carried out on the self-built experimental platform, and the activation temperature, activation time, impregnation ratio and impregnation time and other activation and physicochemical characteristics were systematically studied. Activated carbons with different specific surface area and pore structure were prepared by physical activation and chemical activation, changing carbonization and activation conditions. The pore structure of activated carbon was analyzed by ASAP2020M aperture analyzer. The surface structure characteristics of activated carbon and the pyrolysis process of biomass under different conditions were studied. The adsorption performance and yield of activated carbon prepared by two methods were discussed and compared. The results show that activation condition and impregnation condition are the most important factors. The optimum specific surface area of activated carbon prepared by physical activation method is 924.48m'/g, and the yield is 26.18%.Activated carbon (AC) is a kind of porous carbon material with developed pore structure and large specific surface area, which is prepared by using biological organic matter (such as wood, coke, petroleum coke, coal and various nut shells, etc.). It is a kind of high quality adsorbent. With the development of industry, its application is more and more extensive. At present, it has been widely used in the field of environmental protection, food industry and medicine. Industry, agriculture and many other fields. In recent years, one of the research hotspots of activated carbon is to use cheap agricultural and forestry wastes as raw materials and simple and clean process to prepare biomass activated carbon with high economic benefit and good adsorption performance. If the agricultural and forestry wastes are effectively utilized and turned into treasures, it can not only create certain economic benefits, but also reduce its pollution to the environment, and achieve the purpose of treating waste with waste. In this paper, using biomass (corn cob, rice husk and peanut shell) as raw material, the experimental research on the preparation of activated carbon from biomass was carried out on the self-built experimental platform, and the activation temperature, activation time, impregnation ratio and impregnation time and other activation and physicochemical characteristics were systematically studied. Activated carbons with different specific surface area and pore structure were prepared by physical activation and chemical activation, changing carbonization and activation conditions. The pore structure of activated carbon was analyzed by ASAP2020M aperture analyzer. The surface structure characteristics of activated carbon and the pyrolysis process of biomass under different conditions were studied. The adsorption performance and yield of activated carbon prepared by two methods were discussed and compared. The results show that activation condition and impregnation condition are the most important factors. The optimum specific surface area of activated carbon prepared by physical activation method is 924.48m'/g, and the yield is 26.18%.  

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