Effect of synthesis parameters on the chromium content and catalytic activities of mesoporous Cr-MSU-x prepared under acidic conditions
文献类型：期刊论文
| 作者 | Liu, Licheng; Li, Huiquan; Zhang, Yi |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY B
 |
| 出版日期 | 2006-08-10 |
| 卷号 | 110期号:31页码:15478-15485 |
| 关键词 | mcm-41 molecular-sieves oxidative dehydrogenation oxide catalysts carbon-dioxide pore-size silica ethane performances surfactants ethylene |
| ISSN号 | 1520-6106 |
| 其他题名 | J. Phys. Chem. B |
| 中文摘要 | A series of chromium-incorporated MSU-x mesoporous molecular sieves were synthesized under different templates, initial Si/Cr molar ratios, aging times, and temperatures in acid solution. The synthesis was performed by using sodium silicate, chromium nitrate, and nonionic poly(ethylene oxide) surfactant as the source of silicone, metal, and the template, respectively. The Cr-MSU-x products were analyzed by inductively couple plasma-optical emission spectrometry to determine the actual Cr content and were characterized by X-ray diffraction, N-2 adsorption-desorption, scanning electron microscopy, high-resolution transmission electron microscopy, diffuse reflectance UV-visible, X-ray adsorption near-edge spectroscopy, and temperature-programmed reduction techniques. The Cr species were mostly formed as Cr(VI) in tetrahedral coordination. Two kinds of Cr(VI) species with different reduction abilities were distinguished. The catalytic activities of Cr-MSU-x in the dehydrogenation of ethane to ethylene with CO2 were investigated at the same time. The synthesis parameters explored strongly influence the chromium content in Cr-MSU-x and, subsequently, the catalytic activities. The Cr-MSU-x synthesized with Si/Cr = 20, aging at 25 degrees C for 22 h, and templating by fatty alcohol polyoxyethylene ether gave the best activities, resulting in 58.0% ethane conversion and 92.1% ethylene selectivity. The Cr species in Cr-MSU-x are more efficient in activating and converting ethane molecules than are conventional catalysts. |
| 英文摘要 | A series of chromium-incorporated MSU-x mesoporous molecular sieves were synthesized under different templates, initial Si/Cr molar ratios, aging times, and temperatures in acid solution. The synthesis was performed by using sodium silicate, chromium nitrate, and nonionic poly(ethylene oxide) surfactant as the source of silicone, metal, and the template, respectively. The Cr-MSU-x products were analyzed by inductively couple plasma-optical emission spectrometry to determine the actual Cr content and were characterized by X-ray diffraction, N-2 adsorption-desorption, scanning electron microscopy, high-resolution transmission electron microscopy, diffuse reflectance UV-visible, X-ray adsorption near-edge spectroscopy, and temperature-programmed reduction techniques. The Cr species were mostly formed as Cr(VI) in tetrahedral coordination. Two kinds of Cr(VI) species with different reduction abilities were distinguished. The catalytic activities of Cr-MSU-x in the dehydrogenation of ethane to ethylene with CO2 were investigated at the same time. The synthesis parameters explored strongly influence the chromium content in Cr-MSU-x and, subsequently, the catalytic activities. The Cr-MSU-x synthesized with Si/Cr = 20, aging at 25 degrees C for 22 h, and templating by fatty alcohol polyoxyethylene ether gave the best activities, resulting in 58.0% ethane conversion and 92.1% ethylene selectivity. The Cr species in Cr-MSU-x are more efficient in activating and converting ethane molecules than are conventional catalysts. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Chemistry, Physical |
| 研究领域[WOS] | Chemistry |
| 关键词[WOS] | MCM-41 MOLECULAR-SIEVES ; OXIDATIVE DEHYDROGENATION ; OXIDE CATALYSTS ; CARBON-DIOXIDE ; PORE-SIZE ; SILICA ; ETHANE ; PERFORMANCES ; SURFACTANTS ; ETHYLENE |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000239463300059 |
| 公开日期 | 2013-10-24 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/3960]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, Beijing 100080, Peoples R China 2.Grad Univ, Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Licheng,Li, Huiquan,Zhang, Yi. Effect of synthesis parameters on the chromium content and catalytic activities of mesoporous Cr-MSU-x prepared under acidic conditions[J]. JOURNAL OF PHYSICAL CHEMISTRY B,2006,110(31):15478-15485. |
| APA | Liu, Licheng,Li, Huiquan,&Zhang, Yi.(2006).Effect of synthesis parameters on the chromium content and catalytic activities of mesoporous Cr-MSU-x prepared under acidic conditions.JOURNAL OF PHYSICAL CHEMISTRY B,110(31),15478-15485. |
| MLA | Liu, Licheng,et al."Effect of synthesis parameters on the chromium content and catalytic activities of mesoporous Cr-MSU-x prepared under acidic conditions".JOURNAL OF PHYSICAL CHEMISTRY B 110.31(2006):15478-15485. |
入库方式： OAI收割
来源：过程工程研究所
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