生物质气一步法合成二甲醚中试实验

Pilot scale study on direct synthesis of dimethyl-ether from biomass synthesis gas

在列管式连续固定床中试系统上，采用自制二甲醚（DME）合成催化剂，以玉米芯经两段式固定床富氧气化合成气为气源，进行一步法合成DME实验研究。考察了催化剂反应温度（210～295℃）、空速（650～3000h-1）对合成过程的影响，并对合成DME催化剂反应前后进行XRD）表征。实验结果表明：反应空速为1200h。时，最佳反应温度为270℃时，此时CO转化率最高为73．55％；空速在650～3000h-1时，CO转化率为82．00％～67．74％，时空产率为124．28—281．24kg／（m3·h）。

The pilot scale technology of dimethyl-ether （DME） synthesis from biomass synthetic gas using hybrid catalyst is studied in a fixed bed. In this paper, the temperature （210- 295 ℃ ） and the GHSV （650- 3 000 h-l） of the reaction are used to investigate their effects on the direct DME synthesis. The results show that the best reaction temperature of DME synthetic catalyst is 270℃ and CO conversion ratio reaches 73.55% when the reaction GHSV is 1 200 h- 1. CO conversion ratio and the space time yield reach 82.00% -67.74% and 124.28- 281.24 kg/（m3·h） respectively when the reaction GHSV is between 650 - 3 000 h- 1.