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www.chinactivecarbon.com 02022-01-19 22:22:54
Therefore, it is widely used in many fields of industry, agriculture, transportation, medicine and health, chemical industry, metallurgy, environmental protection, national defense, aerospace and People's Daily life.Because of its acid resistance, alkali resistance, heat resistance, and granular activated carbon can be easily regenerated after adsorption saturation, so it plays a more and more role.With the development of society and the improvement of people's living standards, the enhancement of environmental protection awareness, activated carbon in the field of application, market demand for product types, demand shows a trend of gradual growth. This also promotes thgold adsorption on activated carbon e formation of large-scale production of activated carbon at home and abroad.There are many kinds of activated carbon products, according to raw materials can be divided into: coal based activated carbon, wood activated carbon, nut shell activated carbon and synthetic activated carbon.Due to the demand of environmental protection, the production of wood activated carbon is subject to more and more restrictions.www.chinactivecarbon.com   Wood activated carbon in China since the 1970 s, the proportion of total domestic activated carbon production of 80% to 40% of the 90 s, but our country coal resources are relatively abundant, variety complete, and low cost, stable and reliable supply, taking coal base as raw material to the production of coal based activated carbon percentage rise gradually, in the 1970 s and 90 s, coal-based activated carbon in China increased from 15% to 60% of the total amount of active carbon, and present a trend of increasing 1 all the time. Therefore, the preparation technology of coal based activated carbon has been widely valued at home and abroad, and has made great development.At the same time, it has improved the performance of coal-based activated carbon products and become the world's largest activated carbon product in terms of production and consumption, accounting for about 70% of the total output of activated carbon in the ancient world.However, due to the protection of the environment and high-quality coal and wood resources, some developed countries have introduced relevant laws and regulations to limit the production of high pollution and high energy consumption of activated carbon, resulting in the production and export of activated carbon gradually reduced;On the other hand, because activated carbon is a resource-consuming, labor-intensive product, the production cost of activated carbon produced in developed countries is high, and its competitiveness in the international market is gradually declining.The activated carbon exported by China is mainly of middle and low grade varieties, with low added value. In order to occupy the international market share, enterprises generally adopt low-price marketing strategy, resulting in the low price of activated carbon in the international market.Statistics show that at present, the average price of China's exported activated carbon is only one quarter of that of the United States. This extremely low selling price, for the activated carbon preparation industry, which relies on resource consumption to a large extent, is undoubtedly a waste of precious data. Activated carbon industry is currently facing the dilemma of low price and resource waste. Due to the rapid development of activated carbon industry in some Southeast Asian countries with relatively rich resources, the export of activated carbon is increasing year by year. International buyers use their sales channels to maliciously undercut prices; Domestic industry standards such as: output, capital, technology, environmental protection and other aspects, low entry threshold, the flood of small enterprises. There are some small enterprises lack of funds, the corresponding preparation technology is backward, in the market shoddy, malicious price. As a result, the precious characteristic resources in the process of preparing activated carbon are wasted, leading to the shortage of high quality raw media.  [View Answers]
www.chinactivecarbon.com02022-01-18 22:21:33
The evaporation loss of petroleum and its products during processing, storage and transportation is an important problem perplexing the petroleum and environmental protection industries. gold adsorption on activated carbon  If no action is taken, the impact on people's health, the economy and the environment will be serious. Therefore, it is urgent and important to promote and adopt oil and gas recovery technology.In this paper, the basic principles of four oil and gas recovery technologies such as adsorption method, condensation method, absorption method and membrane separation method are described, and the oil and gas recovery technology based on adsorption method is systematically analyzed.A kind of activated carbon material suitable for oil and gas recovery system by adsorption method was selected according to the design requirements.www.chinactivecarbon.com  The main equipment of oil and gas recovery system by activated carbon adsorption method, the activated carbon tank, is designed and calculated, and its strength is checked. The flowchart of the oil and gas recovery system by activated carbon adsorption in the laboratory of Environmental Engineering Department is also drawn, and the system is simulated in three dimensional. Finally, the economic and technical analysis of activated carbon oil and gas recovery technology is carried out, and it is considered that the application of activated carbon adsorption oil and gas recovery system will bring obvious social benefits, environmental benefits and economic benefits, and has a wide application prospect.  [View Answers]
www.chinactivecarbon.com02022-01-12 23:12:07
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.gold adsorption on activated carbon  If the gas speed is very small, the size of the adsorber is large and uneconomical. If the gas velocity is too large, the pressure drop will increase and the adsorption efficiency will be affected.The optimum gas velocity was determined by experiment. www.chinactivecarbon.com  [View Answers]
Or flowerbeds packed with activated carbon02022-01-12 23:06:52
The treatment of organic waste gas mainly includes two categories: recovery method and elimination method.The main recovery technologies of organic waste gas include: adsorption method, absorption method, condensation method, membrane separation technology and pressure swing adsorption technology.Organic waste gas elimination technology can be divided into two categories: physical - chemical method and biological method.gold adsorption on activated carbon  Physical - chemical methods include thermal destruction, photodecomposition, corona, ozone decomposition, etc.Biological methods include biological filter, biological drip filter, biological scour tower, membrane bioreactor, activated sludge process, etc.The purification rate of activated carbon adsorption method can reach more than 95%, if there is no regeneration device, the operation cost is too high, if the steam recovery, the process is too long, the operation cost is high, the recovery of solvent and water mixture utilization value is not high;Regeneration needs a stable steam source, and the adsorption capacity of activated carbon after repeated adsorption and desorption will gradually reduce, generally use two or three years after the replacement.The purification rate of liquid absorption method is only 60%-80%, and there are secondary pollution problems.www.chinactivecarbon.com   The purification rate of catalytic combustion method can reach 95%, but it is suitable for the treatment of high concentration, small air volume and high exhaust gas temperature of organic waste gas, and the gas temperature is higher, in order to improve the exhaust gas temperature, it needs to consume a lot of energy.The most used method is a catalytic combustion method, adsorption, it mainly particles or honeycomb carbon as adsorbent, to ensure the continuity of production, generally set up two adsorption bed used interchangeably, as a result of the ćµ·large investment, operation trouble;As the bed volume is large, it is easy to appear the combustion and explosion caused by the accumulation of adsorption heat.To solve these problems, the adsorber of the existing new device adopts a multi-unit shunt combination structure, and uses a new material -- activated carbon fiber as adsorbent  [View Answers]
www.chinactivecarbon.com02022-01-11 22:42:04
Ra is 10.24nm. 1. Combined with Zeta potential, sedimentation experiment, viscosity measurement and other methods, the influence of various dispersants on CEO and slurry suspension effect was studied. The results showed that the formula with good stability was the appropriate concentration of mixed dispersant (NAP +SBN) or (NAP +PAM+SBN).gold adsorption on activated carbon  2. The removal rate of CEOZ slurry prepared with mixed dispersant (NAP +PAM+SBN) in the processing of K9 glass by MASJP was higher than that of other mixed dispersants.www.chinactivecarbon.com  By comparing the processing effect of MASJP with and without mixed additives, it is found that the processing effect of MASJP with mixed additives (NAP +PAM+SBN) has higher surface quality, which can significantly reduce the interface area between the polished area and the unpolished surface and increase the smooth surface as much as possible.3. Combining online observation and single factor method, the formation process of the surface features of the polished area was studied. The experimental results showed that the surface morphology of the polished area showed a W-shaped bowl structure in the vertical jet machining, and an eccentric bowl structure in the crescent shape in the oblique jet machining.Compared with the abrasive water jet machining effect, it is found that the W shape and crescent shape characteristics of the polishing region of MASJP are relatively flat, the smooth surface is larger and the surface quality is higher. 4. When applying nozzle with different outlet shapes in MASJP, it is found that the fluid ejected from the cylindrical nozzle flows out along the direction of the jet and does not disperse. The processing area of the fan-shaped nozzle is large, the polishing area is approximately a rectangle, and the removal depth near the nozzle is larger.Hollow conical nozzle processing finished parts, the polishing area formed a hollow circle, the central part of the removal of less, the circumference of the removal of deep;The removal depth of the polishing area decreases gradually from the center to the circumference after the finished piece is processed by the solid conical nozzle. 5, the workpiece surface profile and material removal depth with the selection of polishing slurry composition changes.With the increase of abrasive concentration, the material removal depth increases, which is roughly in a proportional relationship.With the increase of abrasive particle size, the material removal depth also increases.  [View Answers]

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