Study On Structure Nature Of Methanol Synthesis Catalysts And Influence Of Operating Conditions On Synthesis Process

Methanol is an important organic chemical material, which is the basis of C1 chemical industry and also is a fine organic solvent and liquid fuel. In the past two years, the growth of methanol production capacity is more than 1,000,000 tpy in our country. And such growth may be further accelerated in further. However, methanol production technology of our country is underdeveloped, the economic performance is poor in many methanol production plants because low level of automation and badly operating state.In this paper, the regularity impact of technological conditions on feed-gas conversion, space-time yield and methanol selectivity is studied, based on the basic nature study of C307 and C9 catalysts; impact of the recycle ratio on the methanol production capacity is validated; the actual adjustable range of the recycle ratio is explored; combined with the market demand of catalyst, the optimization ideas of methanol catalyst is brought forward.The results show as follows:The C307 catalyst which has higher dispersion degree, more activity sites and smaller crystallinity compared with the C9 catalyst, shows better characteristic on activity, selectivity and stability.Elevated temperature or low temperature isn't better to Methanol synthesis, which exist optimum temperature regulating range; when the pressure is lifted, the feed-gas conversion ratio and the space-time yield would rise while the methanol selectivity would reduce; increasing space velocity the feed-gas conversion ratio would reduce, while the space-time yield and the methanol selectivity would rise; the composition of feed-gas {(H2-CO₂)/(CO+CO₂)} should be controlled in range of 2.0 to 2.2, and the best ratio is 2.05; when the content of CO₂ in the feed-gas is 6%, the conversion ratio and the space-time yield could reach the maximum; the sensitivity analysis of technological conditions to the reaction is analyzed, and the conclusion is made that temperature has the most marked effect to the space-time yield while the content of CO₂ has the most marked...