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The role of activated carbon in the pharmaceutical industry02021-12-29 21:08:17
On the basis of industrial test, the technical indexes, pore structure and adsorption properties of activated carbon for water purification by crushing block were analyzed and studied. The results show that there are two kinds of micropores in the activated carbon, and the contribution of micropores to the specific surface area, pore volume and adsorption performance of activated carbon is much larger than that of medium and large pores. It is a kind of activated carbon with low ash content, high strength, activated carbon gold mining narrow pore distribution, high specific surface area and excellent adsorption performance. After analysis and calculation, the mesopar diameter of activated carbon is 6.71A, BET surface area is 764.83m2 /g, Langmuir specific surface area is 1229.5m3 /g, internal specific surface area is 91.50m3 /g, external specific surface area is 673.33m37g, and micropore volume is 0.133 cm3/g. When P/P=0.30, the maximum specific surface area is 809.776 m'7g, and the maximum pore volume is 0.412 cm'/gc activated carbon company 
The role of activated carbon in the pharmaceutical industry02022-01-17 23:32:14
Acid-base modification is to use acid, alkali and other substances to treat activated carbon, according to the actual need to adjust the surface functional groups of activated carbon, make it change, improve its ability of adsorption of metal ions, so as to achieve the desired adsorption effect.Acid-base modification of activated carbon is usually carried out to improve the adsorption effect of activated carbon on metal ions represented by copper ions. The commonly used modifiers include HC1, NaOH and citrate 3.It was found that by acid-base modification of common coal activated carbon, the ash content of the activated carbon could be greatly reduced and the specific surface area of the activated carbon could be increased www.powdered-activated-carbon.com  Electrochemical modification is to change the electrical and chemical properties of activated carbon surface by using micro electric field, so as to improve the adsorption selectivity and performance.It does not need to add chemical agents, does not need to heat, does not cause pollution to the environment, low energy consumption, only a few hundred millivolts, easy to operate.The results show that the adsorption equilibrium of activated carbon is dependent on the electric potential: the adsorption amount of activated carbon increases with the increase of the potential, and the adsorption speed is accelerated;Arpolarity polarization is beneficial to the adsorption of chloroform by activated carbon, while cathodic polarization inhibits the adsorption of chloroform by activated carbon 3-341]. Activated carbon heteroatom carrier and compound modificationActivated carbon has very high stability and good activity, these two basic properties become the activated carbon as a catalyst or catalyst carrier conditions.By introducing certain heteroatoms and compounds on the surface of activated carbon by liquid phase deposition, the adsorption performance of activated carbon can be increased by using the binding effect between these substances and adsorbents.compounds, which has the advantages of increasing the reaction rate and increasing the adsorption capacity.Yang Quanhong et al. 'Using FESO;Activated carbon material was modified. imagitarium activated carbon pellets 
The role of activated carbon in the pharmaceutical industry02021-12-22 23:39:38
The iodine adsorption value, methylene blue adsorption value, strength and BET specific surface area of GAC were 1020.04mGG, 225mg/g, 88.73% and 1486.48m2/g respectively. The experimental results show that the impregnation ratio and carbon activation temperature have great effects on the adsorption performance of GAC, while the kneading temperature and impregnation ratio have great effects on the strength of GAC.activated carbon gold mining  Because the strength of GAC decreases with the increase of impregnation ratio, and the decrease range is large, so the preparation of GAC with compound activator is proposed. The results show that the composite activator can reduce the impregnation ratio of phosphoric acid to wood chips and improve the strength of granular activated carbon.activated carbon company  At the same time, the composite activator can improve the adsorption performance of GAC. Therefore, granular activated carbon with good adsorption performance and high strength can be prepared by this method. 
The role of activated carbon in the pharmaceutical industry02021-12-07 22:42:02
The preparation methods of activated carbon include physical method, chemical method, microwave radiation method, etc.(1) Physical method.activated carbon gold mining  Physical method is to use carbon dioxide, water vapor or the mixture of both as activator, the carbonized carbon material and gas in the activation furnace at 500~1200℃ for carbon activation reaction, so that the pore size of the carbonized material to expand, the formation of activated carbon with porous microcrystalline structure.Gas activation method mainly includes carbonization and activation engineering.The so-called carbonization, refers to the low temperature (about 500℃) is small, the volatile coal tar molecules in the material and the thermal decomposition and curing process of asphalt, that is, to remove the volatile in advance, made suitable for the next step of activation with carbonization.activated carbon company   When the temperature is below 600℃, the specific surface area of carbonized material increases with the increase of temperature.When 600~900℃, the specific surface area reaches a certain value: 250~300 m2/g; when above1000℃, the specific surface area shrinks rapidly. When the carbonization temperature is above 800℃, the reaction performance of carbonized compounds and activation gas gradually becomes weaker, so the carbonization temperature is generally below 1000℃. However, if the residual volatile content and thermal effect are taken into account, the most suitable temperature should be 600~700℃39]. The carbonized substance obtained from the carbonization process is placed in water vapor or a mixture of water vapor and combustion gas and heat treated at 800~1000℃, which is called the activation process. 
The role of activated carbon in the pharmaceutical industry02021-12-29 19:52:03
Laboratory studies have shown that ceramic honeycomb activated carbon catalytic ozone oxidation technology and removal of trace organic matter in water has more obvious advantages, but the catalytic oxidation and active carbon process characteristics to be in-depth study, therefore the pilot was investigated through honeycomb ceramic catalytic ozonation and activated carbon catalytic ozonation and activated carbon filter combination process operation characteristics. activated carbon gold mining  Under experimental conditions, the gas-liquid mass transfer capacity of honeycomb ceramic catalytic reactor is slightly lower than that of ozone reactor, but when the gas-water ratio is greater than 0.15, the gas-liquid mass transfer capacity exceeds that of ozone reactor. The gas holdup (Eg) of ozone reactor and honeycomb ceramic catalytic oxidation reactor is 0.19% and 0.15% respectively when the gas volume is 0.L m3/h, indicating that the size of bubbles in the catalytic oxidation reactor is large, which is not conducive to gas-liquid mass transfer. The Pe values of ozone reactor and honeycomb ceramic catalytic reactor were 3.14 and 5.25, respectively, in the liquid pulse addition test, indicating that the liquid level pushing flow component in catalytic oxidation reactor is higher, which is conducive to gas-liquid mass transfer. The gas-liquid mass transfer efficiency of catalytic oxidation reactor is more affected by increasing gas-water ratio. activated carbon company  
The role of activated carbon in the pharmaceutical industry02021-12-07 18:55:47
Principle of activated carbon adsorption activated carbon is a kind of very small granular hasactivated carbon wholesale  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,  activated carbon for gold recovery 
The role of activated carbon in the pharmaceutical industry02021-12-07 18:54:37
The preparation methods of activated carbon include physical method, chemical method, microwave radiation method, etc.(1) Physical method.activated carbon gold mining  Physical method is to use carbon dioxide, water vapor or the mixture of both as activator, the carbonized carbon material and gas in the activation furnace at 500~1200℃ for carbon activation reaction, so that the pore size of the carbonized material to expand, the formation of activated carbon with porous microcrystalline structure.Gas activation method mainly includes carbonization and activation engineering.The so-called carbonization, refers to the low temperature (about 500℃) is small, the volatile coal tar molecules in the material and the thermal decomposition and curing process of asphalt, that is, to remove the volatile in advance, made suitable for the next step of activation with carbonization.activated carbon company   When the temperature is below 600℃, the specific surface area of carbonized material increases with the increase of temperature.When 600~900℃, the specific surface area reaches a certain value: 250~300 m2/g; when above1000℃, the specific surface area shrinks rapidly. When the carbonization temperature is above 800℃, the reaction performance of carbonized compounds and activation gas gradually becomes weaker, so the carbonization temperature is generally below 1000℃. However, if the residual volatile content and thermal effect are taken into account, the most suitable temperature should be 600~700℃39]. The carbonized substance obtained from the carbonization process is placed in water vapor or a mixture of water vapor and combustion gas and heat treated at 800~1000℃, which is called the activation process. 
The role of activated carbon in the pharmaceutical industry02021-06-24 18:41:21
which is the inorganic part of activated carbon, and ash in active carbon is easy to cause secondary pollution.Because of its strong adsorption, activated carbon is widely used in production,In the life.Activated carbon material is processed by the amorphous carbon, has a large specific surface area, the gas, solution of inorganic or organic matter and colloidal particles have good adsorption capacity.Activated Carbon materials mainly include Activated Carbon (AC) and Activated Carbon Fibers (ACF), etc.Activated carbon material as a kind of excellent adsorbent, mainly because of its unique adsorption surface structure and surface chemical properties.Activated carbon material has stable chemical properties and high mechanical strength. Microwave method, microwave method is not independent of the physical method and chemical method of the preparation of activated carbon, but on the basis of the physical method and chemical method instead of the traditional heating method, but it has a very significant effect.wholesale activated carbon pellets  Microwave refers to the electromagnetic radiation located between far-infrared and radio waves in the electromagnetic spectrum, with a frequency range of 300MHz to 300GHz and a wavelength of 1m to 1mmMicrowave generates "internal friction heat" through high frequency reciprocating motion of dipole molecules in the heated body, which raises the temperature of the material. It does not require any heat conduction process, and has the characteristics of high efficiency, selectivity, non-contact, integrity, uniformity, quick start and stop, and easy operation Studies have shown that activated carbon can effectively absorb microwave energy and make the temperature rise to 110o℃5' within a few minutes.https://www.dxdcarbon.com  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 that 
The role of activated carbon in the pharmaceutical industry02021-06-16 18:49:38
In domestic has been eliminated. Specific surface area test unified the multi-point BET method at home and abroad, specific surface area measurement standards are developed at home and abroad is based on BET test method, please see our national standard (GB/T 19587-2004) - gas adsorption BET principle of solid material specific surface area measurement methods. Specific surface area testing is actually the more time-consuming jobs, as the adsorption capacity of sample is different, some sample testing may need to spend the whole dayTime, if the test process is not fully automated, the tester can not leave at any time, and should be highly focused, observe the dashboard, control the knob, a little careless will lead to the failure of the test process, which will waste a lot of valuable time of the tester.https://www.activated-carbon-pellets.com  F - Sorb 2400 specific surface tester is really able to BET method detection instruments (both direct comparison method), the more important F - Sorb 2400 specific surface tester is by far the only specific surface area of the fully automated intelligent testing equipment, the test results with the international high consistency, the stability is very good also, at the same time reduce the human error, improve accuracy test results.carbon activated company   The adsorption capacity of activated carbon on each gas (unit: mL /cm3):H2, O2, N2, CI2, CO2 4.5, 35, 11, 494, 97 The main factors affecting the adsorption of activated carbon ① the nature of activated carbon adsorbent 
The role of activated carbon in the pharmaceutical industry02021-12-05 21:51:05
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, 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℃. 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.  gold coconut shell activated carbon  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. activated carbon from china 
The role of activated carbon in the pharmaceutical industry02022-01-14 22:33:54
(1) The isotherm of adsorption and desorption of coconut-based activated carbon for domestic tobacco was determined by low temperature nitrogen adsorption method, BET method was used to calculate its specific surface area and pore volume, and density function theory was used to calculate its total pore distribution. The surface morphology of activated carbon was observed by scanning electron microscope. Finally, seven kinds of samples whose structural parameters meet the requirements of the experimental gradient are determined. The specific surface area of the sample ranges from 700-1400m2/g, and the particle size ranges from 40-60, 60-80 and 80-100 mesh. All the samples are dominated by micropores, and the percentage of micropores is more than 80%.www.chinactivecarbon.com  (2) determination of activated carbon to join before and after the join in cigarette smoke volatile) base material, phenolic compounds, 5 kinds of volatile organic compounds (1, 3 butadiene and isoprene, acrylonitrile, benzene and toluene) and aroma composition to release a quantity to change, discusses the structure, the nature of the compound, activated carbon and filtration efficiency of flue gas composition. The results show that the activated carbon has a general filtering effect on flue gas compounds, but the filtering degree of different compounds is different. The filtration efficiency is mainly related to the specific surface area and micropore volume of activated carbon. When the particle size is certain, the filtration efficiency increases with the increase of specific surface area and micropore volume of activated carbon. When the specific surface area and micropore volume are close to each other, the smaller the carbon particle size is, the higher the filtration efficiency of flue gas components is. Microporous high percentage of carbon retention ability of small molecules, of acetaldehyde, 1, 3 - butadiene and isoprene small molecule compounds, such as high filtration efficiency, high percentage and microporous carbon mass transfer resistance is big, such as phenolic half less volatile components of filtering, appropriately increase large and medium hole and transitional channel will increase the filtering of macromolecular compounds. The filtration efficiency was related to the properties of the compounds, especially the molecular weight and boiling point of the compounds. The filtration efficiency of volatile carbon substrate and 5 volatile organic compounds increased with the increase of the boiling point of the molecular weight of compounds. The filtration efficiency of phenolic compounds was significantly lower than that of volatile compounds) and five volatile organic compounds, and the filtration efficiency of binary phenol was lower than that of monophenol. The filtration efficiency of aromatic compounds decreased with the increase of molecular weight boiling point.  gold adsorption on activated carbon 
The role of activated carbon in the pharmaceutical industry92022-03-21 00:11:34
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 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. 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.activated charcoal wholesale australia  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.https://www.dxdcarbon.com/  : 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. This is a widely used physical adsorption, also known as van der Waals adsorption academically. 

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