Tam Contained Type Zeolite Catalysts The Loess Temple Of Coal Pyrolysis Behavior

Pyrolysis of coal is the most basic step of coal conversion process. In order to increase the pyrolysis conversion, lower reaction temperature and control the composition and distribution of the pyrolytic products, TG-FTIR coupled technique is used to investigate the pyrolysis behavior of HTM coal over several typical zeolite catalysts with or without loaded transition metals. The main aspects are as follows:1. The effect of pyrolysis atmosphere is studied by means of TG-FTIR. And the results show that hydrogen atmosphere can promote the conversion of coal pyrolysis. It not only inceases the aromatics. aliphatic hydrocarbons, CH4 and CO, but also reduces the release temperature of these substances.2. The hydropyrolysis processes of HTM coal over HZSM-5 (Si/Al=25,50,100) with or without loaded transition metals (Co or Mo) under 2%,5% and 10% additive amount are studied. TGA results show that the effects of catalysts on coal hydropyrolysis behavior mainly lie in the second degassing stage, there being slightly differences among conversion curves, and the total conversion rate is almost the same. Whereas FTIR results show somewhat changed distribution of pyrolysis products.3. The hydropyrolysis processes of HTM coal over 13X with or without loaded transition metals (Co or Mo) under 2%,5% and 10% additive amount are also studied. And it was found that, compared with HZSM-5, the content of aromatics, aliphatic hydrocarbons, CH4 and CO obtained over 13X are a little bit lower, and the content of CO2 is significantly low.4. Through the analysis of the catalytic hydropyrolysis products it is found that basically the content of CO2 is negative related with that of hydrocarbons, aromatic hydrocarbons, CH4, and CO, i.e.if aliphatic hydrocarbons, aromatic hydrocarbons, CH4, and CO are increased, then there will be a reduction of CO2 content correspondly.