中国石油大学学报（自然科学版）2017，Vol.41Issue(5)：169-175,7.DOI:10.3969/j.issn.1673-5005.2017.05.021
协同效应对一步法合成二甲醚催化剂失活的影响
Influence of synergistic effect on deactivation of direct dimethyl ether synthesis catalyst
摘要
Abstract
As there is synergistic effect between the catalysts in the direct synthesis of dimethyl ether, the feedstock conver-sion is high. Multi-functional catalysts of direct dimethyl ether synthesis were prepared using HZSM-5 zeolite with different Si/Al molar ratio and XNC-98 methanol synthesis catalysts. The differences of synergistic effect on different compositions of synthesis catalysts and their effects on the stability of the catalysts were studied. Meanwhile, the influences of different prep-aration and reduction methods of catalysts on synergistic effect and stability of catalysts were also investigated. The results show that the synergistic effect between the zeolite with Si/Al molar ratio of 40 and methanol synthesis catalysts is the stron-gest, which presents higher activity and better stability. It is also found that close contact between methanol synthesis cata-lysts and methanol dehydration catalysts could result in stronger synergistic effect of composite catalysts were, and better sta-bility of catalysts as well. The reducing gas with lower hydrogen was used in the process of reduction, which can obtain smal-ler Cu grain of the methanol synthesis catalysts after reduction. And the activity and stability of the catalyst are also better.关键词
二甲醚/催化剂/协同效应/失活Key words
dimethyl ether/catalyst/synergistic effect/deactivation分类
化学化工引用本文复制引用
张海鹏,于英民,李青松..协同效应对一步法合成二甲醚催化剂失活的影响[J].中国石油大学学报（自然科学版）,2017,41(5):169-175,7.基金项目
重质油国家重点实验室自主研发重点项目(SLKZZ-2017002) （SLKZZ-2017002）
