Effect of vanadyl species in Keggin-type heteropoly catalysts in selective oxidation of methacrolein to methacrylic acid
文献类型：期刊论文
| 作者 | Zhou, Lilong; Wang, Lei; Zhang, Suojiang; Yan, Ruiyi; Diao, Yanyan |
| 刊名 | JOURNAL OF CATALYSIS
 |
| 出版日期 | 2015-09-01 |
| 卷号 | 329期号:SEP页码:431-440 |
| 关键词 | Vanadyl species Heteropoly compounds Methacrolein Methacrylic acid Oxidation |
| ISSN号 | 0021-9517 |
| 英文摘要 | Three Keggin-type heteropoly catalysts with different vanadyl species, H4PMo11VO40 (V existing in the primary structure), HVOPMo12O40 (V existing as VO2+ in the secondary structure), and V2O5/H3PMo12O40 (V existing in V2O5 before calcination), were prepared and studied to identify the preferable vanadyl species for oxidation of methacrolein to methacrylic acid. The catalysts were characterized by FT-IR, Raman, XRD, UV-vis, EPR, and XPS before and after calcination at different temperatures. The calcined catalysts were applied in the selective oxidation of methacrolein. The chemical state and position of the vanadyl species varied with the treatment temperature. Compared with the VO2+ species in HVOPMo12O40, the VO2+ species generated in H4PMo11VO40 and V2O5/H3PMo12O40 during calcination processes showed very different promotional effects, and the VO2+ species that interact with the Keggin structure turned to be the main active vanadyl species in all the catalysts. The active vanadyl species changed from an independent ion form to a squashed square pyramidal on Keggin structure or defect Keggin structure during the oxidation reaction. The optimum conversion of methacrolein and selectivity to methacrylic acid were obtained on the V2O5/H3PMo12O40 catalyst calcined at 350 degrees C, so a new means of adding vanadium in the Keggin-type heteropoly catalysts to obtain high selectivity to methacrylic acid is proposed. (C) 2015 Elsevier Inc. All rights reserved. |
| WOS标题词 | Science & Technology ; Physical Sciences ; Technology |
| 类目[WOS] | Chemistry, Physical ; Engineering, Chemical |
| 研究领域[WOS] | Chemistry ; Engineering |
| 关键词[WOS] | ONE-STEP SYNTHESIS ; 12-MOLYBDOPHOSPHORIC ACID ; STRUCTURAL EVOLUTION ; ISOBUTYRIC ACID ; CESIUM SALTS ; SOLID-STATE ; AMMONIUM ; ISOBUTANE ; BEHAVIOR ; PROPANE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000361250800041 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/19569]  |
| 专题 | 过程工程研究所_多相复杂系统国家重点实验室 |
| 作者单位 | Chinese Acad Sci, Beijing Key Lab Ion Liquids Clean Proc, Inst Proc Engn, Key Lab Green Proc & Engn,State Key Lab Multiphas, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou, Lilong,Wang, Lei,Zhang, Suojiang,et al. Effect of vanadyl species in Keggin-type heteropoly catalysts in selective oxidation of methacrolein to methacrylic acid[J]. JOURNAL OF CATALYSIS,2015,329(SEP):431-440. |
| APA | Zhou, Lilong,Wang, Lei,Zhang, Suojiang,Yan, Ruiyi,&Diao, Yanyan.(2015).Effect of vanadyl species in Keggin-type heteropoly catalysts in selective oxidation of methacrolein to methacrylic acid.JOURNAL OF CATALYSIS,329(SEP),431-440. |
| MLA | Zhou, Lilong,et al."Effect of vanadyl species in Keggin-type heteropoly catalysts in selective oxidation of methacrolein to methacrylic acid".JOURNAL OF CATALYSIS 329.SEP(2015):431-440. |
入库方式： OAI收割
来源：过程工程研究所
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