Direct gas-phase epoxidation of propylene to propylene oxide using air as oxidant on supported gold catalyst
文献类型：期刊论文
| 作者 | Suo, Zhanghuai1; Jin, Mingshan1; Lu, Jiqing2; Wei, Zhaobin2; Li, Can2 |
| 刊名 | journal of natural gas chemistry
 |
| 出版日期 | 2008-06-01 |
| 卷号 | 17期号:2页码:184-190 |
| 关键词 | gold catalyst support modified impregnation method epoxidation of propylene molecular oxygen |
| 产权排序 | 2;3 |
| 通讯作者 | zhanghuai suo |
| 英文摘要 | gold catalysts supported on sio(2), tio(2), tio(2)-sio(2), and zro(2)-sio(2) supports were prepared by impregnating each support with a basic solution of tetrachloroauric acid. x-ray diffraction (xrd), transmission electron microscopy (tem), and x-ray photoelectron spectroscopy (xps) techniques were used to characterize their structure and surface composition. the results indicated that the size of gold particles could be controlled to below 10 nm by this method of preparation. washing gold catalysts with water could markedly enhance the dispersion of metallic gold particles on the surface, but it could not completely remove the chloride ions left on the surface. the catalytic performance of direct vapor-phase epoxidation of propylene using air as an oxidant over these catalysts was evaluated at atmospheric pressure. the selectivity to propylene oxide (po) was found to vary with reaction time on the stream. at the reaction conditions of atmosphere pressure, temperature 325 degrees c, feed gas ratio v(c(3)h(6))/v(o(2)) = 1/2, and ghsv = 6000 h(-1), 17.9% po selectivity with 0.9% propylene conversion were obtained at initial 10 min for au/sio(2) catalyst. after reacting 60 min only 8.9% po selectivity were detected, but the propylene conversion rises to 1.4% and the main product is transferred to acrolein (72% selectivity). washing au/tio(2)-sio(2) and au/zrp(2)-sio(2) samples with magnesium citrate solution could markedly enhance the activity and po selectivity because smaller gold particles were obtained. |
| WOS标题词 | science & technology ; physical sciences ; technology |
| 类目[WOS] | chemistry, applied ; chemistry, physical ; energy & fuels ; engineering, chemical |
| 研究领域[WOS] | chemistry ; energy & fuels ; engineering |
| 关键词[WOS] | au catalysts ; molecular-oxygen ; incipient wetness ; oxidation ; impregnation ; propene ; ethylene ; o-2 ; h-2 ; ts-1 |
| 收录类别 | SCI |
| 原文出处 | true |
| 语种 | 英语 |
| WOS记录号 | WOS:000257686500014 |
| 公开日期 | 2010-11-30 |
| 源URL | [http://159.226.238.44/handle/321008/101261]  |
| 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 | 1.Yantai Univ, Inst Appl Catalysis, Yantai 264005, Shandong, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China |
| 推荐引用方式 GB/T 7714 | Suo, Zhanghuai,Jin, Mingshan,Lu, Jiqing,et al. Direct gas-phase epoxidation of propylene to propylene oxide using air as oxidant on supported gold catalyst[J]. journal of natural gas chemistry,2008,17(2):184-190. |
| APA | Suo, Zhanghuai,Jin, Mingshan,Lu, Jiqing,Wei, Zhaobin,&Li, Can.(2008).Direct gas-phase epoxidation of propylene to propylene oxide using air as oxidant on supported gold catalyst.journal of natural gas chemistry,17(2),184-190. |
| MLA | Suo, Zhanghuai,et al."Direct gas-phase epoxidation of propylene to propylene oxide using air as oxidant on supported gold catalyst".journal of natural gas chemistry 17.2(2008):184-190. |
入库方式： OAI收割
来源：大连化学物理研究所
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