Enhanced activation and decomposition of CH4 by the addition of C2H4 or C2H2 for hydrogen and carbon nanotube production
文献类型：期刊论文
| 作者 | Qian, Weizhong1; Tian, Tao1; Guo, Chenyi1; Wen, Qian1; Li, Kuangjie2; Zhang, Hongbo3; Shi, Haibo1; Wang, Dezheng1; Liu, Yi1; Zhang, Qiang1 |
| 刊名 | journal of physical chemistry c
 |
| 出版日期 | 2008-05-22 |
| 卷号 | 112期号:20页码:7588-7593 |
| 英文摘要 | the decomposition of ch4 in the presence of c2h4 or c2h2 using a nanosized iron or nickel based catalyst with volume ratios of c2h4 or c2h2 to ch4 of 1.75:1 to 0.55:1 was investigated. the presence of c2h4 or c2h2 increased the conversion of ch4 to 3 to 5 times that with no c2h4 or c2h2; that is, it significantly increased the production rate of carbon from 20-30 to 45-75 g/gcat/h at 723-873 k. the online detection of the time dependent composition of the product gas and experiments in which the feeding sequence of ch4 and c2h4/c2h2 was changed allowed us to propose a mechanism for the enhanced decomposition as follows. first, the facile exothermic adsorption and decomposition of c2h4 or c2h2 provides the driving force for the in situ endothermic decomposition of ch4. subsequently, the thermodynamically favored intermediate products of aromatics or poly aromatics are formed by the insertion of ch4 into adsorbed c2h4 or c2h2 fragments. finally, the intermediate products are rapidly dehydrogenated on the high activity catalyst to form carbon nanotubes (cnts). the enhancement effect is dependent on the ratio of c2h4 to ch4 but independent of the ratio of c2h2 to ch4, which was explained as being due to the different exothermicities of the c2h4 and c2h2 reactions. this finding provides a new stimulus for methane activation at low temperature to produce hydrogen and cnts with high efficiency. |
| WOS标题词 | science & technology ; physical sciences ; technology |
| 类目[WOS] | chemistry, physical ; nanoscience & nanotechnology ; materials science, multidisciplinary |
| 研究领域[WOS] | chemistry ; science & technology - other topics ; materials science |
| 关键词[WOS] | catalytic decomposition ; methane decomposition ; gas ; adsorption ; acetylene ; ethylene |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000255905400015 |
| 公开日期 | 2015-11-17 |
| 源URL | [http://159.226.238.44/handle/321008/141004]  |
| 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 | 1.Tsinghua Univ, Dept Chem Engn, Beijing Key Lab Green Chem React Engn & Technol, Beijing 100084, Peoples R China 2.Beijing Inst Technol, Sch Mat Sci & Engn, Beijing 100081, Peoples R China 3.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China 4.Tianjin Univ, Sch Chem Engn, Tianjin Key Lab Appl Catalysis Sci & Technol, Tianjin 300072, Peoples R China |
| 推荐引用方式 GB/T 7714 | Qian, Weizhong,Tian, Tao,Guo, Chenyi,et al. Enhanced activation and decomposition of CH4 by the addition of C2H4 or C2H2 for hydrogen and carbon nanotube production[J]. journal of physical chemistry c,2008,112(20):7588-7593. |
| APA | Qian, Weizhong.,Tian, Tao.,Guo, Chenyi.,Wen, Qian.,Li, Kuangjie.,...&Li, Yongdan.(2008).Enhanced activation and decomposition of CH4 by the addition of C2H4 or C2H2 for hydrogen and carbon nanotube production.journal of physical chemistry c,112(20),7588-7593. |
| MLA | Qian, Weizhong,et al."Enhanced activation and decomposition of CH4 by the addition of C2H4 or C2H2 for hydrogen and carbon nanotube production".journal of physical chemistry c 112.20(2008):7588-7593. |
入库方式： OAI收割
来源：大连化学物理研究所
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