摘要
采用并流共沉淀法制备了一系列ZrO2的原子比不同的CuO-ZnO-ZrO2甲醇合成催化剂。在固定床反应器中进行合成气制甲醇的研究,考察了ZrO2在催化剂中的作用。结果表明,ZrO2的加入能显著提高催化剂的性能,当ZrO2的原子比达到0.10时,催化剂的活性最高并且耐热性能最强;过量的ZrO2会降低催化剂的活性。利用TPR、XRD、BET技术对催化剂进行了表征,发现适量ZrO2的加入不仅有助于提高Cu活性组分在催化剂表面的分散,提高催化剂的比表面积,使催化剂不容易高温烧结,而且有利于促进催化剂还原。
A variety of CuO-ZnO-ZrO2 methanol catalysts with ZrO2 contents were prepared by co-precipitation. The catalytic activity and thermo-stability of catalysts for hydrogenation of synthesis gas to methanol were tested using a fixed-bed reactor. The results showed that the catalyst containing 0.10 (atomic ratio) of ZrO2 performed the best catalytic behavior. The BET, XRD and TPR measurement revealed that the addition of ZrO2 increased the dispersion particle of catalysts, enlarge the surface areas, deduced the catalytic reduction temperature, prevented the catalysts from sintering at higher temperature and enhanced the reduction capability of the catalysts also.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2007年第6期696-700,共5页
Journal of Fuel Chemistry and Technology
