生物质合成气合成甲醇

THE METHANOL SYNTHESIS FROM BIOMASS-DERIVED SYNGAS

在高压微型反应装置上进行了生物质合成气合成甲醇的实验研究。利用组成为V(H2)/V(CO)/V(CO2)/V (N2)=50/25/20/5的富CO2原料气考察了不同温度、压力和空速条件下甲醇的时空产率、甲醇和水的选择性等指 标。结果表明,在所考察的范围内,温度、压力和空速对甲醇的产率和选择性都有影响。在反应压力为4．6MPa, 空速为7000h-1时,时空产率的最大值为0．69g/(mL·h),甲醇的选择性范围为93％-97．2％。和富CO的原料气 相比,利用富CO2的生物质合成气合成甲醇,甲醇的时空产率和选择性都有所下降,时空产率下降的幅度在 10％-30％之间,选择性的下降幅度在2％-8％之间。通过控制适宜的操作条件,可降低甲醇的产率和选择性 的下降幅度。

The synthesis of methanol from CO2-rich （CO/CO2/H2） syngas was carried out in a high pressure micro-reactor system. The effect of temperature, pressure and space velocity on Space Time Yield （STY） and selectivity of methanol was studied using a feed gas which is composed of H2（50%）,CO（25%）,CO2（20%） and N2（5%）. The results show that both STY and selectivity of methanol are infected by these parameters in tested ranges. The highest STY is about 0.69gmL^-1 h^-1 and selectivity ranges from 93% to 97.3% at P=4.6MPa, SV=7000h^-1 . Compared with the results of methanol synthesis using CO-rich syngas, SPY and selectivity of methanol are decreased in the range of 10-30% and 2-8% respectively. Optimal STY and selectivity of methanol can be obtained by controlling suitable operation conditions.