ROLES OF OXYGEN AND CARBON-DIOXIDE ON METHANE OXIDATIVE COUPLING OVER CAO AND SM2O3 CATALYSTS
文献类型：期刊论文
| 作者 | TANG, CL; ZANG, JL; LIN, LW |
| 刊名 | APPLIED CATALYSIS A-GENERAL
 |
| 出版日期 | 1994-08-18 |
| 卷号 | 115期号:2页码:243-256 |
| 关键词 | Calcium Oxide Methane Conversion Samarium Oxide |
| ISSN号 | 0926-860X |
| 文献子类 | Article |
| 英文摘要 | The effect of partial pressures of oxygen and carbon dioxide on the rate of methane conversion over CaO and Sm2O3 catalysts has been investigated by measuring the concentration gradients of products and reactants along the catalyst bed. The results show that the oxidative reaction of methane mainly occurred in the reaction zone of the bed where the methane, oxygen and catalyst co-exist. In this zone, although the oxygen concentration decreases significantly, the rate of methane conversion remains constant over Sm2O3 catalyst at 873 K. No inhibition of the catalyst activity by carbon dioxide was observed over Sm2O3 catalyst. By contrast, at the same reaction temperature of 873 K, CaO catalyst can be completely deactivated behind the reaction zone where the partial pressure of carbon dioxide produced was only 0.8 KPa. When the reacton temperature was elevated to 973 K and 1073 K, the rate of conversion of methane increased sharply to a maximum at the entrance of the bed and then slowly dropped with increasing bed height due to carbon dioxide formation. The curve of rate distribution displays a sharp drop at the point where the concentration of oxygen reaches zero. Based on the above results, a kinetic equation for the methane conversion rate has been suggested which is zero order in oxygen and first order in methane, and the isotherm for carbon dioxide adsorption can be described by a Langmuir equation. |
| WOS关键词 | LI/MGO CATALYST ; CONVERSION ; PHASE ; OXIDE ; MGO |
| WOS研究方向 | Chemistry ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:A1994PD97100004 |
| 出版者 | ELSEVIER SCIENCE BV |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/167558]  |
| 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 | CHINESE ACAD SCI,DALIAN INST CHEM PHYS,POB 110,DALIAN 116023,PEOPLES R CHINA |
| 推荐引用方式 GB/T 7714 | TANG, CL,ZANG, JL,LIN, LW. ROLES OF OXYGEN AND CARBON-DIOXIDE ON METHANE OXIDATIVE COUPLING OVER CAO AND SM2O3 CATALYSTS[J]. APPLIED CATALYSIS A-GENERAL,1994,115(2):243-256. |
| APA | TANG, CL,ZANG, JL,&LIN, LW.(1994).ROLES OF OXYGEN AND CARBON-DIOXIDE ON METHANE OXIDATIVE COUPLING OVER CAO AND SM2O3 CATALYSTS.APPLIED CATALYSIS A-GENERAL,115(2),243-256. |
| MLA | TANG, CL,et al."ROLES OF OXYGEN AND CARBON-DIOXIDE ON METHANE OXIDATIVE COUPLING OVER CAO AND SM2O3 CATALYSTS".APPLIED CATALYSIS A-GENERAL 115.2(1994):243-256. |
入库方式： OAI收割
来源：大连化学物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。