铜基催化剂催化合成气一步合成甲醇和甲酸甲酯IV.空速、反应时间、杂质和Cu-Cr摩尔比的影响(英文)

在低温低压和浆态反应条件下，考察了空速、反应时间、杂质及Ｃｕ－Ｃｒ摩尔比对铜基催化剂催化合成气一步合成甲醇和甲酸甲酯反应的影响。实验结果表明，空速对催化剂活性有较显著的影响；ＣＯ转化率与反应时间无关，但Ｈ２的转化率与反应时间有关。在１５小时之内Ｈ２的转化率随反应时间增加而缓慢增加，此后与反应时间无关。此外，高浓度的杂质使催化剂的活性和寿命下降，而且Ｃｕ／Ｃｒ摩尔比和热处理气氛对催化剂的物相和活性也有显著的影响。

CONCURRENT SYNTHESIS OF METHANOL AND METHVL FORMATE FROM SYNTHESIS GAS CATALYZED BY COPPER-BASED CATALYSTS IV. INFLUENCES OF SPACE VELOCITY, REACTION TIME AND IMPURITIES AS WELL AS Cu-Cr MOLAR RATIONS

The concurrent synthesis of methanol(CH3OH) and methyl formats (HCOOCH3, MF) from synthesis gas at low temperature and pressure in a slurry phase heterogeneously catalyzed by copper-based catalysts has been investigated, including influences of space velocity (SV), reaction time and impurities as well as Cu-Cr molar ratios. The experimental results have demonstrated that the space velocity has a significant influence on the catalyst activity. The conversion of CO is independent of reaction time, but the conversion of H2 depends upon the reaction time. The conversion of H2 increases slowly with the reaction the during the first 15h. After that, the conversions are irrelevant to the reaction time. In addition, the impurities with high content may reduce the catalyst activity and life. Furthermore, Cu-Cr molar ratio and thermal treatment atmosphere have remarkable influences on the catalyst phase and activity.