High-efficiency deep desulfurization active carbon and preparation method thereof

Abstract

The invention discloses high-efficiency deep desulfurization active carbon and a preparation method thereof, belonging to the field of modified active carbon materials. The high-efficiency deep desulfurization active carbon is prepared through the steps of by adopting coal or a coconut shell as raw materials, crushing, screening, then adding a coal tar adhesive for extrusion forming, and calcining at 750-950 DEG C to form primary active carbon; carrying out dipping treatment on the primary active carbon, uniformly loading a hydroxide active agent and a cyclodextrin assistant active agent, carrying out secondary high-temperature calcination in the presence of excessive heat water vapors to obtain a high-efficiency desulfurization active carbon product. The active carbon prepared through the method disclosed by the invention has the advantages of high sulphur capacity, high desulfurization speed, long usage period, high strength, good abrasion resistance, good material permeability, no dust and the like, can not only be used for the large-scale deep desulfurization and purification of petrochemical products such as fuel oil, natural gas, gas, liquid hydrocarbon and synthetic ammonia, but also be used for the fields of pharmaceutical gas sterilization, solution filtration and purification, solvent recovery, water purification, gas purification and the like.

Description

technical field [0001] The invention relates to the field of modified activated carbon materials, in particular to a high-efficiency deep desulfurization activated carbon and a preparation method thereof. Background technique [0002] A large number of research results have shown that limiting the sulfur content in petrochemical products such as fuel oil is the best way to reduce sulfur dioxide emissions in the atmosphere and effectively avoid the formation of acid rain. Therefore, in order to avoid environmental pollution, countries all over the world have long attached great importance to the research and development of desulfurization technology for petrochemical products such as fuel oil, and have formulated strict laws to limit the sulfur content in oil products. As stipulated in Europe, the sulfur content of gasoline and diesel must be lower than 10ppm. With the rapid development of my country's economy, under the general trend that the country pays more and more atte...

AI Technical Summary

Problems solved by technology

However, its strength and wear resistance are not high, which has a great impact on its actual industrial application.

[0005] However, judging from the current research results and practical application effects of related activated carbon adsorbents, there are generally insufficient strength of activated carbon products, more dust, and the loaded catalyst is easy to block the pores of activated carbon, resulting in a large pressure difference between the inlet and outlet of the adsorption equipment and slow desulfurization speed. There are a series of problems such as short cycle time and low number of regeneration cycles; in addition, many related activated carbon adsorbents need to use strong acids as oxidants in the preparation process, which puts forward high requirements for equipment anti-corrosion and safety and environmental protection in the production process, and further increases cost

The existence of these unfavorable factors makes it difficult for the current deep desulfurization activated carbon adsorbent products and their preparation processes to be popularized in practical applications.