Catalyst issues in the large-scale gasification of coal?

Catalyst issues in the large-scale gasification of coal? It seems there is no catalyst (except for the catalysts used in coal combustion in boilers). The coal combustion catalyst CHARNA C produced by Beijing Jinyuan Chemical Group Co., Ltd. has been granted authorization by the Intellectual Property Office; its patent number is ZL 200610075905.0. 　　Coal combustion catalysts are mainly composed of four categories: penetration-type, oxygen-containing free radical-type, catalytic cracking-type, and functional surface-type. The chemical principles behind energy conservation and emission reduction involve improving the combustion efficiency of coal by altering the kinetic properties of coal combustion and catalytically cracking the large molecular carbon chains in coal. Numerous industrial applications have shown that by adding the coal combustion catalyst CHARNA C to coal, it is possible to save 8–15% of the coal used, reduce sulfur dioxide emissions by 20–30%, and at the same time remove coking and scale.

In laboratory studies, alkali metals such as K, Na, and Li; alkaline earth metals like Ca and Mg; and transition metals such as Ni and Fe all have varying degrees of effect in promoting the gasification of coal. In large-scale gasification processes, Fe is used as a gasification catalyst; the role of the others is not very clear

In my opinion, the most important aspect in the gasification process is that, in the gasification furnace, it should be the burners that play a key role； The increase in main temperature and pressure during the gasification process, as well as post-treatment.

In coal gasification, I only know that there is a gasifying agent; I’m not aware of what catalysts are used (my knowledge is too limited). The gasifying agent is obtained by mixing oxygen or air with steam in proportion and then feeding this mixture into the gasification furnace. Steam serves both as a catalyst within the furnace and as a means to control the temperature there.

Catalysts that are used in this context are mainly alkali metal catalysts; they serve to lower the temperature of the gasification reaction and thereby reduce energy consumption. This project has been developed by the ENN Group in Langfang, Hebei, and it has received funding: http://www.enn.cn/big5/news/media_20090916_063132.html http://www.cheminfo.gov.cn/static/temp_hgyw/20090916240072.htm

What was mentioned upstairs is just a research project; it is still a long way away from industrialization. The main reason is the high cost associated with the difficult recovery of catalysts, followed by issues such as catalyst corrosion and scaling. In fact, catalytic gasification was studied quite early on; the reasons why it has not been industrialized are complex, with cost being the key factor. Personally, I think gasification technology is already quite mature nowadays, and the prospects for catalytic gasification don’t seem very good.

Industrial-scale gasification processes do not use catalysts, mainly due to cost considerations

The gasification reaction of coal is relatively fast; no catalyst is required, and the focus varies among different gasification processes