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The Difference Between Biochar and Activated Carbon

Although biochar and activated carbon are both composed of carbon elements and have adsorption capabilities, they have significant differences in structure and application fields. And today we will mainly talk about it. Difference Between Biochar and Activated Carbon 1. Composition and structure: Biochar is mainly composed of carbon elements, with loose and porous characteristics. Its pores are unevenly distributed, with both macropores and micropores and mesopores, and the specific surface area is usually within 400 square meters per gram. Activated carbon is also composed of carbon elements, but it is looser than ordinary charcoal and has stronger adsorption capacity. Activated carbon is mainly microporous, with a specific surface area of more than 1000 square meters per gram. Even activated carbon prepared using seaweed as raw material can have a specific surface area of about 2000. 2. Application areas: Biochar is widely used in agriculture, industry, environment, new energy and other fields. For example, in the agricultural field, biochar can improve the water holding capacity and nutrient supply of the soil, increase microbial activity, and help increase crop yields. In the environmental field, biochar, as an excellent adsorption material, can remove pollutants in the environment. Activated carbon has excellent adsorption properties...

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Factors That Affect The Adsorption Of Activated Carbon On Dioxins

 The pore structure of activated carbon mainly includes specific surface area, pore volume and pore size distribution, which are key parameters affecting the adsorption performance of activated carbon and important factors affecting dioxin adsorption. The adsorption of dioxin on activated carbon is essentially a pore filling process. After the dioxin molecules contact the surface of activated carbon through external diffusion, they diffuse into the pores through the pore channels on the surface of activated carbon. Today we will explain its influence in detail.   Factors affecting the adsorption of dioxin by activated carbon   Pore size distribution: The pore size of activated carbon needs to match the size of dioxin molecules for effective adsorption. The suitable pore size range is 2.0~5.0nm.   Specific surface area: The larger the specific surface area, the stronger the adsorption capacity. Generally, the specific surface area is required to be greater than 500m²/g.   Pore volume: Pore volume and pore volume are also important factors affecting the adsorption effect, and the specific pore volume is usually required to be greater than 0.2cm³/g.   Effects in practical applications   In practical applications, activated carbon achieves effective adsorption and elimination of dioxins through its unique pore structure and physical and chemical properties. For...

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Principle of Mercury Removal by Activated Carbon

Activated carbon is a kind of micro-quality carbon material made of carbon-containing materials. It is black in appearance, odorless, non-toxic, has a developed internal pore structure, a large specific surface area, and strong adsorption capacity. It is a commonly used adsorbent. It makes mercury vapor react with sulfur more easily and more effectively to produce mercury sulfide, which is deposited in the pores of activated carbon to achieve the purpose of removing mercury. It is suitable for removing mercury vapor in airflow in places where conventional methods are difficult to remove mercury. Ensure production safety and environmental protection standards. Principle of activated carbon adsorption of mercury: Activated carbon is a highly adsorbent with a large number of pores and surface area and good adsorption performance. For harmful metal elements such as mercury, they are mainly adsorbed by activated carbon through physical adsorption and chemical adsorption. Physical adsorption refers to the monolayer of mercury atoms formed on the pores and surfaces of activated carbon. This adsorption is reversible and weakens with increasing temperature. Chemical adsorption refers to the adsorption of mercury ions by the active functional groups of activated carbon and the combination with the active functional groups through chemical bonds....

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Relationship Between Methylene Blue And Iodine Adsorption Values ​​Of Activated Carbon

Methylene blue adsorption value and iodine adsorption value are two different indicators to measure the performance of activated carbon, each reflecting different characteristics of activated carbon. ‌ The methylene blue adsorption value is mainly used to characterize the decolorization ability of activated carbon. The molecular diameter of methylene blue is larger than that of iodine molecules, so the methylene blue value is usually used to represent the number of mesopores in activated carbon, which is crucial for the decolorization process. The higher the methylene blue value, the stronger the decolorization ability of activated carbon is usually, which means that the decolorization effect is better at the same unit weight. ‌Iodine adsorption value is mainly used to characterize the adsorption ability of activated carbon for small molecules, especially for micropores with a diameter of less than 1.0nm. The diameter of iodine molecules is only 0.335nm, so the iodine value reflects the degree of development of activated carbon micropores, which is very important for the adsorption of small molecular impurities. The higher the iodine value, the stronger the adsorption capacity of activated carbon, and the more effectively it can remove impurities such as organic matter, residual chlorine, heavy metal ions in water,...

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Working Process of Activated Carbon Adsorption Steam Recovery System

The activated carbon adsorption, desorption, condensation and recovery combination utilizes the adsorption and desorption capabilities of activated carbon at different temperatures to perform adsorption and desorption operations on organic matter. The equipment is mainly composed of an activated carbon adsorption and desorption tank, a pneumatic valve, a fan, a chimney, a dry filter, a drying fan, a condenser, an oil-water separator, etc. The steam desorption system can meet the requirements by using the manufacturer’s steam or a small steam generator. The desorption efficiency can reach 80%-90%. The desorbed gas enters the condensation system and is separated and reused through the oil-water separator, which is energy-saving and environmentally friendly, achieving the effect of resource recycling. Working Process: Pretreatment adsorption: The exhaust gas is pressurized by the fan and enters the activated carbon adsorber. The organic components are adsorbed when penetrating the activated carbon layer, and the adsorbed and purified gas is discharged from the top. Desorption regeneration: The desorption recovery process uses water vapor to regenerate the activated carbon. The desorption steam enters from the top, heats the activated carbon bed, and desorbs organic matter. The humidity and temperature of the desorbed activated carbon are very high, and air needs to...

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Do You Know the Application of Lindlar Catalyst?

Lindela catalyst is a unique supported palladium hydrogenation catalyst, mainly used for selective catalytic hydrogenation reactions. It is made of palladium adsorbed on a carrier and a small amount of inhibitor added. Common carriers are CaCO3 and BaSO4, and inhibitors include lead salts, bismuth salts or lead-bismuth mixtures. Lindlar catalyst has a highly selective hydrogenation effect on acetylenic bonds, and can only hydrogenate acetylenic bonds during the hydrogenation process without affecting other polyene bonds. Application areas Pharmaceutical synthesis: Lindlar catalyst is widely used in drug synthesis. For example, it is used to prepare 25-hydroxycholesterol, which is an important precursor for the generation of 1,25-(OH)2D3, which is essential for bone formation and calcification. In addition, the catalyst is also used for the hydrogenation of vitamin A intermediates, selectively hydrogenating only acetylenic bonds without affecting other polyene bonds. Species and flavors synthesis: In the synthesis of spices and flavors, the highly selective hydrogenation of Lindlar catalyst enables it to efficiently synthesize specific flavor ingredients to meet the needs of different products. Environmental protection: Lindlar’s catalyst recovery technology can effectively recover valuable resources from spent catalysts, and therefore has been widely used in the environmental protection field4.

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