Preparation method of modified bio-charcoal based catalyst

Abstract

The invention discloses a preparation method of a modified bio-charcoal based catalyst, which can remove carbonyl sulfide, carbon disulfide, and hydrogen cyanide at the same time. The bio-charcoal is taken as the carrier, a series of modifications is carried out to prepare the catalyst, the catalyst is applied to catalytic hydrolysis so as to simultaneously remove COS, CS2, and HCN; the work temperature of the catalyst is not higher than 100 DEG C, the removal rates of COS and CS2 are not less than 90%, the removal rate of HCN is not less than 70%; and the bio-charcoal based catalyst is prepared by the following steps: subjecting waste biomass to carbonization and activation in sequence so as to obtain the bio-charcoal carrier, then boiling the bio-charcoal carrier in a KOH solution, adding the bio-charcoal carrier in a metal salt solution to carry out ultrasonic impregnation, then burning the bio-charcoal carrier at a certain temperature; adding the burned bio-charcoal carrier into an alkaline solution to carry out ultrasonic impregnation, and finally drying to obtain the bio-charcoal based catalyst. The technology is concise, the operation is convenient, the operation is continuous, COS, CS2 and HCN in flue gas are removed and converted into valuable resources, and no secondary pollution is generated.

Description

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AI Technical Summary

Benefits of technology

This patented technology provides an effective way to remove harmful substances from exhaust streams by utilizing biomass or metals that have been treated with certain agents beforehand. These processes involve reacting them under specific conditions such as low temperatures and strong acidic solutions. By removing these reagents, valuable resources like nitrogen (N) and oxygen (O2) may be recovered while minimising environmental impacts associated therewith. Additionally, this technique allows for efficient recovery of useful components including organosulfanes, thiocyanates, polysacchangers, aminopyridines, quaternary salts, etc., which could help improve air quality standards and reduce health hazards caused by volatile compounds released into our environment.

Problems solved by technology

Technologies described include methods for efficiently decombing volatile compounds containing chlorine or fluoroformyl nitrosothiocyanate (HCNS). These techniques involve converting these molecules into more stable forms like hydrocrackable liquid products called solvates. However, there exist other ways to break down them while reducing environmental impact caused by certain types of halogens including bromochloroarsene (BCL2) and hexavalenceodium monosulfanadionte(HDMA)). Additionally, some technical means involving combining different processes together may help reduce emissions and improve treatment outcomes.

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