Effect of basicity and adding CO2 in the feed on the oxidative coupling of methane over K2O and SrO promoted La2O3/ZnO catalysts | |
Xu, YD; Yu, L; Guo, XX | |
刊名 | applied catalysis a-general |
1997-12-23 | |
卷号 | 164期号:1-2页码:47-57 |
关键词 | oxidative coupling of methane basicity active oxygen species KSLZ catalyst |
英文摘要 | lz and slz catalysts are fairly active for oxidative coupling of methane. their catalytic performance can be further improved by adding k+ cations (supposedly in the form of k2o) as promoters. under conventional reaction conditions such as a reaction temperature of 1073 k, methane conversion is 18.2% and c-2-selectivity is 68.3%. the effect of adding co2 into the feed has also been examined in order to understand the promotional effect of k2o on the reaction. xrd, co2-tpd and xps techniques were used to characterize the basicity and possible active oxygen species of kslz catalysts. the functions of k2o in kslz catalyst can be attributed to its high dispersion, enrichment of surface basic sites and the ability to create active oxygen adspecies on the catalyst surface. unfortunately, at the moment it is difficult to definitely identify the nature of the active oxygen adspecies. meanwhile, it is found that with decreasing concentrations of sro species on the catalyst surface, the catalyst will be less sensitive to the addition of co2 in the feed. (c) 1997 elsevier science b.v. |
WOS标题词 | science & technology ; physical sciences ; life sciences & biomedicine |
类目[WOS] | chemistry, physical ; environmental sciences |
研究领域[WOS] | chemistry ; environmental sciences & ecology |
关键词[WOS] | oxide catalysts ; surface |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000070990200005 |
公开日期 | 2015-11-17 |
内容类型 | 期刊论文 |
源URL | [http://159.226.238.44/handle/321008/142827] |
专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
作者单位 | Chinese Acad Sci, State Key Lab Catalysis, Dalian Inst Chem Phys, Dalian 116023, Peoples R China |
推荐引用方式 GB/T 7714 | Xu, YD,Yu, L,Guo, XX. Effect of basicity and adding CO2 in the feed on the oxidative coupling of methane over K2O and SrO promoted La2O3/ZnO catalysts[J]. applied catalysis a-general,1997,164(1-2):47-57. |
APA | Xu, YD,Yu, L,&Guo, XX.(1997).Effect of basicity and adding CO2 in the feed on the oxidative coupling of methane over K2O and SrO promoted La2O3/ZnO catalysts.applied catalysis a-general,164(1-2),47-57. |
MLA | Xu, YD,et al."Effect of basicity and adding CO2 in the feed on the oxidative coupling of methane over K2O and SrO promoted La2O3/ZnO catalysts".applied catalysis a-general 164.1-2(1997):47-57. |
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