The Unique Role of CaO in Stabilizing the Pt/Al2O3 Catalyst for the Dehydrogenation of Cyclohexane
文献类型：期刊论文
| 作者 | J. F. Yu ; R. Wang ; S. Y. Ren ; X. Y. Sun ; C. L. Chen ; Q. J. Ge ; W. Fang ; J. Zhang ; H. Y. Xu ; D. S. Su |
| 刊名 | Chemcatchem
 |
| 出版日期 | 2012 |
| 卷号 | 4期号:9页码:1376-1381 |
| 关键词 | calcium coke dehydrogenation heterogeneous catalysis platinum transform infrared-spectroscopy pt/gamma-al2o3 catalyst alkane dehydrogenation coke characterization platinum xps adsorption metal methylcyclohexane isomerization |
| ISSN号 | 1867-3880 |
| 中文摘要 | Coke-induced deactivation is one of the major challenges in the field of heterogeneous catalysis. Herein, the performance of the Pt/Al2O3 catalyst for the hydrogen-free dehydrogenation of cyclohexane was improved by doping with a small amount of Ca. The Ca-modified Pt/Al2O3 catalyst exhibited a cyclohexane conversion of 97.0?% and maintained a conversion above 75?% after 48 h, whilst the unmodified catalyst was deactivated from 87.0 to 2.7?% under the same conditions. Characterization techniques, including in situ DRIFT, XPS, thermal analysis, and temperature-programmed techniques, revealed that the presence of Ca effectively suppressed the deep dehydrogenation of H-rich carbonaceous components and promoted coke desorption by increasing the H/C ratio of H-deficient coke. This promotion effect of Ca was also associated with neutralizing the residual Cl ions and promoting immediate dehydrogenation. |
| 原文出处 | |
| 公开日期 | 2013-02-05 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/60418]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | J. F. Yu,R. Wang,S. Y. Ren,et al. The Unique Role of CaO in Stabilizing the Pt/Al2O3 Catalyst for the Dehydrogenation of Cyclohexane[J]. Chemcatchem,2012,4(9):1376-1381. |
| APA | J. F. Yu.,R. Wang.,S. Y. Ren.,X. Y. Sun.,C. L. Chen.,...&D. S. Su.(2012).The Unique Role of CaO in Stabilizing the Pt/Al2O3 Catalyst for the Dehydrogenation of Cyclohexane.Chemcatchem,4(9),1376-1381. |
| MLA | J. F. Yu,et al."The Unique Role of CaO in Stabilizing the Pt/Al2O3 Catalyst for the Dehydrogenation of Cyclohexane".Chemcatchem 4.9(2012):1376-1381. |
入库方式： OAI收割
来源：金属研究所
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