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Chemical adsorption and physical adsorption of activated carbon02021-06-09 18:29:13
Activated carbon is a carbon adsorption material with coal, wood and nut shell as raw materials, used in gas adsorption. Separation, purification and separation of liquid purification and other fields. The industrial application of activated carbon by appearance distinguish forming granular activated carbon, are there not finalize the granular activated carbon, powdered activated carbon, activated carbon fiber, etc., main application fields including wastewater treatment, activated carbon depth clean drinking water, medicine and food decolorizing refining, precious metal extraction, gas separation and purification, solvent recovery, and military and civil protection.activated carbon suppliers canada  Taking coal as raw material to the production of coal based activated carbon is a kind of has a developed interspaces structure of carbonaceous adsorption material, has good chemical stability and mechanical strength, coal based activated carbon products can be widely used in decoloring purification, solvent recovery, gas separation, gas purification, and various kinds of water treatment and other fields, some through special processing, the special T also can be used as a high-performance activated carbon desulfurization agent, catalyst and catalyst carrier, mountain in the acid and alkali resistant, heat resistant, granular activated carbon on adsorption saturation after failure, can be a party to regenerate.dxd carbon  The application of coal-based activated carbon is divided into liquid phase and gas phase according to the characteristics of the material. The liquid phase is mainly used in decolorization, recovery of precious metals and water treatment. Gas phase is mainly used in gas purification and recovery, industrial waste gas treatment, flue gas desulfurization and gas protection, etc. In recent years, some foreign activated carbon manufacturers have developed coal-based activated carbon with special adsorption capacity by adopting new processes, new methods and advanced raw material treatment technology, which has greatly improved and enhanced the performance of coal-based activated carbon products, expanded the application field and highlighted a broader market prospect. 
Physical adsorption of activated carbon02021-05-28 00:20:30
At this time, the concentration of the adsorbed substance in the solution is called equilibrium concentration.In aerobic part, a self-made internal circulating biological fluidized bed reactor was used to treat organic pesticide wastewaterThe effects of internal circulating biological fluidized bed on the removal of organic matter and the deamination of organic pesticide wastewater, the change of wastewater biodegradability and acute biological toxicity were investigated.The results show that the internal circulation biological fluidized bed with granular activated carbon as the carrier has a fast speed of membrane and can be cultured in about days by the rapid sludge drainage methodOut of activated sludge.The internal circulating biological fluidized bed with granular activated carbon as the carrier is not sensitive to temperature change at 1 ℃, and has a certain impact resistance ability.Aeration amount has effect on the treatmentToo large or too small aeration will reduce the reactor treatment efficiency.The optimal hydraulic retention time of the internal circulating biological fluidized bed using granular activated carbon as carrier is, and the treatment effect will be affected if the hydraulic retention time is too long or too short.activated carbon pellets companies  At the aeration rate of /,During hydraulic retention, the total helium removal rate is.%,.%, water effluent/up tothe biodegradability of wastewater was significantly improved, and the acute biological toxicity was reduced by %.When the efficiency of internal circulating activated carbon biological fluidized bed treatment is.%, the reaction is obtained granular activated carbon manufacturers korea  Activated carbon adsorption, is the use of activated carbon on the solid surface of the water adsorption or a variety of substances, in order to achieve the role of water purification. The adsorption of activated carbon is produced in two aspects.One is that the molecules inside the activated carbon are subjected to equal forces in all directions while the molecules on the surface are subjected to uneven forces.This makes other points adsorbed on its surface, which is physical adsorption;The other is due to the chemical action between activated carbon and adsorbed substances, which is chemical adsorption.The adsorption of activated carbon is the result of the comprehensive action of the above two kinds of adsorption. 
Chemical adsorption of activated carbon02021-11-11 01:40:01
Activated carbon treatment process is the use of adsorption method to remove odor, some ions and difficult to biodegradable organic pollutants. In the process of adsorption, the specific surface area of activated carbon plays a major role.granular activated charcoal  At the same time, the solubility of the adsorbed substance in the solvent also directly affects the adsorption speed. In addition, pH, temperature changes and the degree of dispersion of the adsorbed substances also have certain effects on the adsorption rate.coal activated carbon supplier   The adsorption of impurities in the water by activated carbon has both physical adsorption and chemical adsorption. Some of the adsorbed substances are concentrated on the surface of the activated carbon first, and then are adsorbed between atoms or molecules of the solid lattice, and some special substances are combined with the activated carbon molecules and are adsorbed. When activated carbon on the water containing impurities adsorption, dissolved impurities in the water on the surface of activated carbon accumulation and adsorption, but also some of the adsorbed material due to molecular movement and left the surface of activated carbon, re-enter the water at the same time the phenomenon of desorption. 
Activated carbon chemical adsorption price02021-11-11 01:40:50
As the main energy source in our country, the pollutants produced by coal burning during the development and utilization of coal also worsen the atmospheric environment day by day. The control of sulfur dioxide and nitrogen oxides pollution from coal burning has become the mowholesale activated carbon pellet st urgent task in atmospheric environment control. At present, China has applied some flue gas purification technologies such as wet, semi-dry, dry desulfurization, selective catalytic reduction denitration, wet combined desulfurization and denitration technology, electron beam method and so on. These technologies are developed and applied only for one kind of pollutant, resulting in problems such as resource waste, large initial investment and high operating cost.www.chinactivecarbon.com/  Therefore, it is an important subject for sustainable development to study the green and environment-friendly integrated flue gas purification technology with high efficiency, low cost and no secondary pollution. 
Activated carbon chemical adsorption process02021-06-09 00:05:44
Because of these pores, especially the micropores provide a large surface area. The pore volume of activated carbon micropores is generally only 0.25-0.9mL/g, the number of pores is about 1020 lg, and the surface area of all micropores is about 500-1500m2/g, which is usually measured by the BET method, and it is also said to be as high as 3500-5000 m2/g.activated carbon suppliers canada  Activated carbon almost more than 95% of the surface area is in the micropore, so in addition to some macromolecules can not enter, micropore is an important factor to determine the adsorption performance of activated carbon.dxd carbon   The pore volume of mesopores is generally about 0.02-1.0 MLLg, and the surface area can be up to several hundred square meters, generally only about 5% of the total activated carbon silkworm species. Its function can adsorb steam, and can provide a channel for adsorbent to enter the micropore, and can directly adsorb larger molecules. The pore volume of the macropore is generally about 0.2-0.5mL /g, and the surface area is only about 0.5-2m2 /g. Its role is to make the adsorbate molecules quickly penetrate into the smaller pores inside the activated carbon.as a catalytic carrier, the catalyst is often a small amount of precipitation in the micropore, mostly precipitation in the macropore and mesopore. The surface area of the activated carbon should include the inner surface area and the outer surface area. In fact, the adsorption properties mainly come to the inner surface area of the white Li large, so it can not be mistaken for: the activated carbon grinding and grinding will significantly improve the surface area to improve the adsorption force. Many adsorbations are recursive physical adsorption, that is, the adsorbed matter is a fluid, which is adsorbed by activated carbon at a certain temperature and pressure. At high temperature and low pressure, the adsorbed matter desorbs out, and the inner surface of activated carbon returns to its original state. 
What is the chemical adsorption of columnar activated carbon0dingxinda92021-01-10 23:26:18
In physics, activated carbon is fused with raw materials based on intermolecular force or London dispersion force. Activated carbon cannot be effectively combined with certain compounds, including alcohols, alcohols, ammonia, strong acids and alkalis, metals and most inorganic compounds such as lithium, sodium, iron, lead, arsenic, fluorine and boric acid. Activated carbon can absorb iodine well. In fact, the iodine value mg/g (ASTM D28 standard method test) is used as an indicator of total surface area. silver loaded activated carbon  Activated carbon can be used as a substrate of various chemicals to improve its adsorption capacity for some inorganic (and organic) compounds, such as hydrogen sulfide (H2S), ammonia (NH3), formaldehyde (hcoh), mercury (Hg) and radioisotope iodine -131 (131I). This property is called chemical adsorption. Chemical activation of activated carbon: first impregnate with phosphoric acid or potassium hydroxide, sodium hydroxide or zinc chloride, and then carbonize in the range of 450-900°C. It is believed that the carbonization activation process and the chemical activation process proceed simultaneously. In some cases, this technique may be problematic, for example, trace amounts of zinc may remain in the product. However, chemical activation of activated carbon is better than physical activation because the temperature required to activate the material is lower and the time required is shorter.https://www.wyactivatedcarbon.com/   Activated carbon can be used as a substrate of various chemicals to improve its adsorption capacity for some inorganic (and organic) compounds, such as hydrogen sulfide (H2S), ammonia (NH3), formaldehyde (hcoh), mercury (Hg) and radioisotope iodine -131 (131I). This property is called chemical adsorption. 
Chemical adsorption principle of activated carbon 02021-06-08 18:48:52
The experimental results show that the surface structure of the activated carbon material modified by FeSO changes: the specific surface area decreases, the surface oxygen content increases, the plane of the random layer graphite carbon net is destroyed to a certain extent, and the ammonia absorption capacity and benzene absorption performance of the sample are greatly enhanced.He ChunHong et al. [reported the research progress of supporting activated carbon materials in the removal of SO; the removal ability of SO was significantly enhanced after supporting Co, Ni, Mg, and V compounds, which was due to the formation of Co(OH)2, Ni(OH)2, Mg (OH)2, and V,0 microcrystals on the surface of activated carbon after supporting, which enhanced the desulfurization activity of activated carbon.  Air velocity of empty tower :U= 1.0m /s.OriginalIts adsorption performance mainly depends on several main material parameters and process parameters on it [8. Material parameters including carbon adsorption porosity, thickness of honeycomb structure and the content of carbon; process parameters including fluid flow rate and concentration of the adsorption properties of adsorption, can adsorption depends on the carbon structure and adsorption properties of features such as molecular weight). The curve is one of the main performance characterization of adsorption, adsorption is the adsorbate concentration ratio before and after the change over time of a function [9 '. This ratio is 0.95, the amount of adsorption properties of adsorption is called penetration capacity. Penetration capacity depending on the fluid flow rate, the concentration of the adsorbate and honeycomb carbon component content the nature of the adsorbent Depends on its bath solubility, surface white energy, polarity, adsorbate molecule size and unsaturation, the concentration of adsorbate, etc ③ Wastewater pH value Activated carbon generally has a higher adsorption rate in acidic solution than in alkaline solution. The pH value will affect the state and bath solubility of the adsorbent in the water towel, thus affecting the adsorption effect. ④ Coexisting substances When a variety of adsorbates coexist, the adsorption capacity of activated carbon to a certain adsorbate is worse than that containing only the adsorbate (5) temperature The effect of temperature on the adsorption of activated carbon is small 
How strong is the chemical adsorption of activated carbon02021-05-28 00:11:10
Distillation, activation treatment after the production of activated carbon methods are :① steam, gas activation method.Carbon is activated by water vapor or carbon dioxide at 850~900℃. ② chemical activation method.Activated carbon can be obtained after high temperature treatment by using the gas released by the activator or soaking the raw material with the activator.Activated carbon has a micro product structure, the micro product arrangement is completely irregular, the product body has micropores (radius is less than 20[angstroms]=10-10 meters), through the hole (halfDiameter 20~1000), large hole (radius 1000~100000), so that it has a large inner surface, specific surface area of 500~1700 m 2/ g.This determines that activated carbon has good adsorption, can adsorb the metal ions in waste water and waste gas, harmful gases, organic pollutants, pigments and so on. Because of its rich pore structure, huge specific surface area and good machinability, activated carbon has become the most studied and widely used adsorbent material in compound filter additives. This paper mainly discusses the activated carbon pore structure on the influence of the filtration efficiency of flue gas particle phase, for the application of active carbon composite filter in the Chinese style cigarette and cigarette * reduce harm reducing tar "work provide basic data and technical support, as well as the preparation with specific pore structure and properties of activated carbon and choose the smoke cigarette manufacturing using activated carbon has certain guiding significance.activated carbon pellets companies  Firstly, the adsorption and desorption isotherms of three activated carbons for coconut shell-based smoke and three activated carbons for apricot kernel based smoke were determined by low temperature nitrogen adsorption method. The specific surface area and total pore volume were calculated by BET model. The microstructure parameters and pore size distribution of micropores and mesopores were calculated by H-K method and BJH method, respectively. The surface morphology of activated carbon was also observed by scanning electron microscope. The results show that the pore structure of activated carbon for commercial tobacco is different at present. Among the six activated carbon samples selected, Y1 and CTN are microporous activated carbon, and the micropore ratio is more than 97%. X3 and X5 samples were medium pore activated carbon with microporosity of only 69.3% and 55.5%. The micropore contents of X2 and Y5 samples were 87.2% and 81.8%, respectively, between X3 and X5 samples and Y1 and CTN samples. SEM observation of the surface morphology of activated carbon samples for smoke showed that the surface of activated carbon was honeycomb-like with developed pores, and the large pores were all in the shape of open pipe structure. There were various small circular and elliptical holes on the pipe wall. granular activated carbon manufacturers korea 
Ding Xinda activated carbon carbon adsorption and carbon principle and adsorption price02021-11-29 22:43:36
Its adsorption is selective, and non-polar substances are easier to be adsorbed than polar substances.In the same series of substances, the higher the boiling point of the substance, the more tolerantEasy to be adsorbed, the greater the pressure,activated carbon from china  the lower the temperature, the greater the concentration, the greater the amount of adsorption.On the contrary, decompression and heating are beneficial to gas desorption.It is often used for gas adsorption,Separation and purification, recovery of solvents, decolorizing agents for sugar solution, grease, glycerin, medicine, deodorant for drinking water and refrigerators, filter agent for gas masks,It can also be used as a catalyst or metal salt catalyst carrier.Early production of activated carbon raw materials for wood, hard nut shell or animal bones, later mainly used coal, after dryingDistillation, activation treatment after the production of activated carbon methods are :① steam, gas activation method.Carbon is activated by water vapor or carbon dioxide at 850~900℃. gold coconut shell activated carbon activated carbon is a kind of very small granular has a large surface area, and more tiny holes in the granular - capillary. The capillary has very strong adsorption capacity, due to the granular surface area is large, so a good contact with with gas (impurities). When these gases (impurities) encounter capillary by adsorption, purification effect. Activated carbon surface area of the study is very important, only the BET specific surface area detecting data of active carbon method detected result is reliable, domestic at present there are many instruments can only make direct comparison method of detection, 
Iodine adsorption value and adsorption capacity of activated carbon0CLMnb2021-08-26 02:59:39
Microwave heating can produce good effects in the preparation and modification of activated carbon (S2. Microwave modification, many backwater hole is opened, the distributed capacitance change obviously, promoting the improvement of the adsorption. The microwave power and irradiation time are key determinants of modified activated carbon adsorption performance. On the mechanism of microwave carbonization and activation, it is generally believed thathttps://www.granular-activated-carbon.com  Plant waste is mostly made of plant fiber raw materials, in the plant body under the action of capillary, modified solution absorbed by material whole fully, between fiber is filled with the subtle space, make the dry material volume expansion after soaking wet, and reaction. Because of the water in the raw material, modified solution constitute a polar molecule, with a strong absorption of microwave dielectric properties,Therefore, polar molecules collide and rub violently with microwave frequency, generating a large amount of heat, which makes water and modified solution volatilize rapidly, and generate steam pressure, which explodes out from the inside of the raw material to the outside. This sharp action makes the fiber space of the raw material expand and produce sharp drying.In this way, the raw material has a more obvious pore structure and a larger internal specific surface area than before microwave irradiation. Compared with the traditional heating method, the mechanism of microwave in the preparation process of activated carbon is completely different.It shows its unique advantages: high efficiency, energy saving, uniformity, selectivity, low pollution, high thermal efficiency, low energy consumption, simple process and equipment and small footprint, conducive to automation, low carbon loss, and recovery of useful substances.coal based granular activated carbon  Many theoretical problems in this new field, especially the microwave heating mechanism, need to be further studied, and the mathematical model of the heating process needs to be established 
Ding Xinda activated carbon carbon adsorption and carbon principle and adsorption02021-11-29 22:42:41
With the rapid development 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. gold recovery activated carbon  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.coconut activated carbon factory  Experts said that with the continuous improvement of people's life quality and health care consciousness enhancement, as well as the rapid development of all kinds of industrial, environmental pollution has been increasingly serious, people an opportunity to contact with a variety of harmful material, activated carbon and activated carbon as the leading raw material to produce medicines and health products, medical market will become a major conventional leading consumer products, Market demand will be on the rise year by year, is a new economic growth point in the pharmaceutical and chemical market, its economic and social benefits will increase year by year. 
Activated carbon air adsorption02021-03-31 19:59:56
Its adsorption performance mainly depends on several main material parameters and process parameters on it [8. Material parameters including carbon adsorption porosity, thickness of honeycomb structure and the content of carbon; process parameters including fluid flow rate and concentration of the adsorption properties of adsorption, can adsorption depends on the carbon structure and adsorption properties of features such as molecular weight). The curve is one of the main performance characterization of adsorption, adsorption is the adsorbate concentration ratio before and after the change over time of a function [9 '. This ratio is 0.95, the amount of adsorption properties of adsorption is called penetration capacity. Penetration capacity depending on the fluid flow rate, the concentration of the adsorbate and honeycomb carbon component content granular activated carbon  Factors such as [10. For honeycomb activated carbon, the wall thickness is a very important parameter, by changing the wall thickness to improve its adsorption efficiency. Under the same porosity, thickness increases, the honeycomb carbon content per unit volume also will increase, which can improve the adsorption capacity. This is because the wall thickness increases, the fluid channel in the cellular cross-sectional area reduced, so the real surface or volume flow rate will increase. At the same time, the contact between adsorbate and carbon efficiency will, there is a balance between the two. Under the given conditions, the balance will determine adsorption increase or decrease. If the adsorbate at higherthe diffusion rate diffuses to the inside of the honeycomb wall, and the empty adsorption site can be continuously adsorbed, so the thick-walled honeycomb should have better adsorption efficiency and adsorption capacity"Determination of air velocity and cross-sectional area of empty towerThe empty tower gas velocity is the velocity of gas passing through the entire cross section of the adsorber.The selection of air velocity not only directly determines the size and pressure drop of the adsorber, but also affects the adsorption efficiency. Activated carbon powder injection combined with bag dust collector (ACI+ BF) is an effective and widely used method to control dioxin emission from incinerator flue gas.wanyang active carbon  In order to provide reference and theoretical basis for the preparation and selection of activated carbon for the adsorption of dioxins, this paper carried out a study on the combined technology of activated carbon injection and double bag dust collector, the characteristics of activated carbon adsorption for dioxins and the influencing factors of activated carbon adsorption for dioxins.The adsorption and desorption isotherms of 13 kinds of commercial activated carbon were determined by low temperature nitrogen adsorption method, and the physical structures of activated carbon were calculated according to BET, T-Plot, BJH and DFT theory, and the iodine value and methylene blue value of 4 kinds of activated carbon were detected. The physical structure characteristics of activated carbon were analyzed in detail to prepare for the subsequent experiment. Using small activated carbon fixed bed adsorption gas phase dioxin test bench, a typical activated carbon adsorption dioxin factors affecting the experimental study, discusses the types of dioxin adsorption activated carbon and activated carbon fixed bed adsorption gas phase characteristics of dioxins, and discusses the adsorption temperature and adsorption time of activated carbon adsorption of dioxins.The results showed that the specific surface area and micropore volume of activated carbon had weak correlation with the adsorption efficiency of dioxins. The mesopore volume of activated carbon is an important factor to determine the adsorption capacity of dioxins. The surface area of the pore size between 2 nm and 20nm plays a key role in the adsorption of dioxins.The higher the adsorption temperature, the lower the adsorption efficiency of activated carbon.The longer the adsorption time, the lower the adsorption efficiency of activated carbon.There is no selective adsorption of gaseous dioxins in activated carbon fixed bed. 

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