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The shell activated carbon is a porous carbon material made of carbon-containing organic matter through carbonization and activation process. It has good selective adsorption force and is widely used in decolorization, water purification and other fields. It is an important chemical product in the national economy. First, the function of the shell activated carbon is extremely large. Different production methods can produce shell-shell activated carbon products with different pore structures, and their adsorption characteristics are also different. The water vapor method has high pores and is suitable for adsorbing small molecular impurities. The phosphoric acid method has more pores in the shell, which is suitable for adsorbing macromolecular impurities, and has less pollution due to phosphoric acid production. It has become the main method for industrial production of shell-shell activated carbon in the United States. Since the size of the impurity molecules is complicated in the industrial wastewater actually treated, the activated carbon used for treating industrial wastewater requires both micropores and mesopores. In order to obtain the granular activated oil of granulated Camellia oleifera with good strength, in this study, the raw material of Camellia oleifera was first carbonized to obtain a stable carbon skeleton with high mechanical strength, and then activated by steam to obtain the basis of microporous shell activated carbon with higher strength. On top, the pore structure is adjusted by phosphoric acid reactivation to increase the mesoporous ratio while maintaining good particle strength.
Camellia oleifera is a unique woody edible oil tree species in China. It is abundant in the southern provinces of China, mainly distributed in Hunan, Jiangxi, Guangxi, Guangdong, Zhejiang, Guizhou, Yunnan and other provinces. Camellia oleifera fruit is composed of oil tea husk and seed. Camellia oleifera accounts for more than 60% of the total quality of whole tea, and its constituents contain cellulose, hemicellulose, lignin and tannin. According to statistics, the existing cultivated area of oil tea in the country has reached 4 million hectares, with an annual output of more than 5.6 million tons of oil tea, which brings more than 3 million tons of camellia husk. Nuts are used to process tea oil, and the shell often becomes a residue that has been discarded and has not been effectively utilized. Therefore, how to make full use of this waste to prepare high value-added products and achieve intensive production is one of the focuses of the research on the oil tea industry.
The experiment determines the preparation process conditions, and at the same time obtains high-quality shell activated carbon with abundant micropores and mesopores, and has good strength, which can meet the requirements of continuous purification of complex water bodies. At the same time, it has positive significance for the comprehensive utilization of the oil tea husk and the expansion of the raw material of the shell activated carbon.
According to the performance of the gas mask, the pore size distribution of activated carbon must be mostly microporous, so that it can be more suitable for adsorbing substances with small molecular diameter (toxic gas). If the pore width of the adsorption pore of activated carbon is smaller than the critical molecular diameter of the adsorbate, it belongs to Invalid pores, but too wide pores can only function as diffusion channels. Therefore, only the critical molecular diameter of the adsorbate is smaller than the pore width, and it cannot exceed a certain size requirement (according to various types of anti-virus) to achieve effective adsorption.
VIEW DETAILSThere are many types of coal-based activated carbon for clean water. The most commonly used ones are coal-based columnar activated carbon, coal-based granular activated carbon, coal-based powdered activated carbon, and coal-like spherical activated carbon.
VIEW DETAILSFollowing the increase in environmental pollution, water use has been affected to varying degrees. In addition, the environment varies from place to place, making the water content of the day different. The use of "odor" in daily water, especially in drinking water, has become the cause of many areas plaguing residents. Honeycomb activated carbon manufacturers will handle this problem for us.
VIEW DETAILSThe shell activated carbon is a porous carbon material made of carbon-containing organic matter through carbonization and activation process. It has good selective adsorption force and is widely used in decolorization, water purification and other fields. It is an important chemical product in the national economy. First, the function of the shell activated carbon is extremely large.
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