Biomass gasification catalyst and its production method

Abstract

A catalyst used in biomass gasifier or gas furnace for cracking tar and removing uncracked tar and alkali metal is prepared from attapulgite-type clay, high-A alumina, iron oxide, magnesium oxide, calcium oxide and anthracite through proportionally mixing, stirring, grinding, granulating and baking.

Description

Technical field: [0001] The invention relates to a catalyst, in particular to a catalyst for a biomass gasification furnace and a production method. Background technique: [0002] In the early 1980s, my country began to study biomass thermal decomposition gasification technology, and developed various forms of gasifiers. Biomass is a kind of renewable energy with abundant reserves. It can be used as an alternative energy source to realize CO 2 Zero emissions, and low S, N content, greatly reduce the greenhouse effect and environmental pollution. [0003] At present, the main problem of domestic biomass gasification technology is that the calorific value of gas is low, and the tar produced in the gasification process is more, which makes it difficult to purify the gas and affects the normal operation of the gasifier. The gas purification system usually adopts simple water washing treatment, which not only causes serious pollution of the washing water, but also is not conduc...

AI Technical Summary

Problems solved by technology

"The particle diameter of finished iron oxide and activated carbon will be less than 1-3cm. In the case of different particle diameters, it is difficult to distribute dolomite, iron oxide and activated carbon evenly, which will directly affect the actual catalytic effect of the catalyst. The price of activated carbon is relatively high, which not only increases the cost of gasification, but also is inconvenient to use

[0006] The thermochemical conversion and utilization of biomass must go through the pyrolysis stage. The alkali metals volatilize and precipitate during the pyrolysis stage, and the steam condenses on the surface of the gasifier, gas pipelines and heat exchangers, and is in a viscous molten state and is continuously captured. The solid particles in the fuel gas make the particles agglomerate, leading to the formation of deposits and corrosion of the reactor, which has a serious impact on the biomass thermal conversion system, hinders heat exchange, and reduces heat exchange efficiency. Therefore, it is necessary to control the concentration of alkali metals control