浆态床合成二甲醚反应工艺条件的研究

Effect of operation parameters on dimethyl ether synthesis in slurry bed

考察了反应温度、反应压力、进料空速以及催化剂配比对于浆态床合成二甲醚反应过程的影响。结果表明 :在反应温度为 2 40～ 2 80℃范围内 ,随着反应温度的升高 ,CO的转化率逐渐增加 ,在 2 70℃达到最大值后开始下降 ;在反应压力为 2 0～ 5 0MPa范围内 ,随着反应压力的升高 ,CO的转化率和二甲醚的选择性逐渐增加 ;在空速为 80 0～ 5 0 0 0h-1范围内 ,随着空速的增加 ,CO的转化率先增加 ,在 30 0 0h 1达到最大值 ,然后逐渐减小 ;催化剂比例对于CO转化率、二甲醚的选择性以及二甲醚的时空收率都有较大的影响 ;在甲醇合成催化剂与脱水催化剂比例为 4～ 5时 ,CO转化率与DME选择性最好。

The effect of operation parameters including reaction temperature, pressure, GHSV and catalyst ratio on dimethyl ether (DME) synthesis in slurry bed were studied in this paper. It was found that CO conversion reached the maximum at 270℃, and DME selectivity decreased slowly as the temperature increased. Both CO conversion and DME selectivity could be improved at higher pressure. The most favorite GHSV for CO conversion and DME synthesis was 3000h -1 .However, the catalyst ratio had a great influence on DME synthesis reaction, the best of which was 4～5.