DYNAMIC PROCESS OF CARBON DEPOSITION ON PT AND PT-SN CATALYSTS FOR ALKANE DEHYDROGENATION
文献类型：期刊论文
| 作者 | LIN, LW; ZHANG, T; ZANG, JL; XU, ZS |
| 刊名 | applied catalysis
 |
| 出版日期 | 1990-12-03 |
| 卷号 | 67期号:1页码:11-23 |
| 关键词 | PLATINUM PLATINUM-TIN DEHYDROGENATION COKE DEPOSITION DEACTIVATION |
| 英文摘要 | the process of carbon deposition on pt/al2o3 and pt-sn/al2o3 catalysts under different conditions was investigated in a multifunctional apparatus which can be used for hydrogen chemisorption; tpo and tpsr determinations. the results showed that on both pt and pt-sn catalysts, carbon deposition is a dynamic process. the carbonaceous materials which originate from the metal surface may be converted to carbon through successive dehydrogenation on metal sites, or they may continuously migrate to the support with irreversible coke formation through condensation or hydrogen transfer reactions. the results of chemisorption and thermal desorption of ethylene on platinum and platinum-tin catalysts showed that the incorporation of tin reduced the strength of chemisorption of the hydrocarbons on the metal surface, so that the carbon precursors can migrate towards the support more easily. the proportion of carbon deposited on the support of the platinum-tin catalysts was greater than that of the platinum catalysts. with the same level of carbon deposition, 30% of the metal surface on platinum-tin catalyst remained uncovered, whereas only 10% of the metal surface of the platinum catalysts was bare. the high stability of pt-sn/al2o3 catalysts is closely related to the larger bare metal surface under high-temperature conditions. |
| WOS标题词 | science & technology ; physical sciences |
| 类目[WOS] | chemistry, physical |
| 研究领域[WOS] | chemistry |
| 关键词[WOS] | coke formation ; reforming catalysts ; pt/al2o3 ; coking |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:A1990ET75300004 |
| 公开日期 | 2015-11-10 |
| 源URL | [http://159.226.238.44/handle/321008/139447]  |
| 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 |
| 推荐引用方式 GB/T 7714 | LIN, LW,ZHANG, T,ZANG, JL,et al. DYNAMIC PROCESS OF CARBON DEPOSITION ON PT AND PT-SN CATALYSTS FOR ALKANE DEHYDROGENATION[J]. applied catalysis,1990,67(1):11-23. |
| APA | LIN, LW,ZHANG, T,ZANG, JL,&XU, ZS.(1990).DYNAMIC PROCESS OF CARBON DEPOSITION ON PT AND PT-SN CATALYSTS FOR ALKANE DEHYDROGENATION.applied catalysis,67(1),11-23. |
| MLA | LIN, LW,et al."DYNAMIC PROCESS OF CARBON DEPOSITION ON PT AND PT-SN CATALYSTS FOR ALKANE DEHYDROGENATION".applied catalysis 67.1(1990):11-23. |
入库方式： OAI收割
来源：大连化学物理研究所
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