Intercorrelation of structure and performance of Ni-Mg/Al2O3 catalysts prepared with different methods for syngas methanation
文献类型：期刊论文
| 作者 | Liu, Jiao; Yu, Jian; Su, Fabing; Xu, Guangwen |
| 刊名 | CATALYSIS SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2014 |
| 卷号 | 4期号:2页码:472-481 |
| 关键词 | ni/al2o3 catalysts carbon-dioxide gas support alumina co hydrogenation nio/al2o3 removal aerogel |
| ISSN号 | 2044-4753 |
| 其他题名 | Catal. Sci. Technol. |
| 中文摘要 | Ni-Mg/Al2O3 catalysts prepared with methods of co-precipitation (CP), homogeneous precipitation (HP) and acid-base pairing (ABP) were tested for syngas methanation at 623-923 K in a stainless steel fixed bed reactor and further characterized to justify their performances. The Ni-Mg/Al2O3 catalysts prepared with CP using NH4OH, NaOH and Na2CO3 as the precipitants followed an activity order of NaOH > NH4OH > Na2CO3. Comparing further with the samples prepared by HP and ABP resulted in an activity order of HP > ABP > CP (NaOH) for syngas methanation under 0.1 MPa. For CO conversion, a transition of reaction control from kinetic dominance to thermodynamic dominance was observed at about 780 K. Performing 20 h continuous tests at 773 K and under 0.1 and 2.5 MPa further verified the stability of the HP, ABP and CP (NaOH) catalysts for syngas methanation. Analyzing the catalysts via H-2-TPR clarified that a lower amount of free NiO and a stronger interaction between the dispersed NiO and Al2O3 or MgO ensured better catalytic performance for methanation. The study also identified two types of carbon deposited on the surface of the spent catalysts. |
| 英文摘要 | Ni-Mg/Al2O3 catalysts prepared with methods of co-precipitation (CP), homogeneous precipitation (HP) and acid-base pairing (ABP) were tested for syngas methanation at 623-923 K in a stainless steel fixed bed reactor and further characterized to justify their performances. The Ni-Mg/Al2O3 catalysts prepared with CP using NH4OH, NaOH and Na2CO3 as the precipitants followed an activity order of NaOH > NH4OH > Na2CO3. Comparing further with the samples prepared by HP and ABP resulted in an activity order of HP > ABP > CP (NaOH) for syngas methanation under 0.1 MPa. For CO conversion, a transition of reaction control from kinetic dominance to thermodynamic dominance was observed at about 780 K. Performing 20 h continuous tests at 773 K and under 0.1 and 2.5 MPa further verified the stability of the HP, ABP and CP (NaOH) catalysts for syngas methanation. Analyzing the catalysts via H-2-TPR clarified that a lower amount of free NiO and a stronger interaction between the dispersed NiO and Al2O3 or MgO ensured better catalytic performance for methanation. The study also identified two types of carbon deposited on the surface of the spent catalysts. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Chemistry, Physical |
| 研究领域[WOS] | Chemistry |
| 关键词[WOS] | NI/AL2O3 CATALYSTS ; CARBON-DIOXIDE ; GAS ; SUPPORT ; ALUMINA ; CO ; HYDROGENATION ; NIO/AL2O3 ; REMOVAL ; AEROGEL |
| 收录类别 | SCI |
| 原文出处 | |
| 语种 | 英语 |
| WOS记录号 | WOS:000329927900024 |
| 公开日期 | 2014-05-06 |
| 版本 | 出版稿 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/8130]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Jiao,Yu, Jian,Su, Fabing,et al. Intercorrelation of structure and performance of Ni-Mg/Al2O3 catalysts prepared with different methods for syngas methanation[J]. CATALYSIS SCIENCE & TECHNOLOGY,2014,4(2):472-481. |
| APA | Liu, Jiao,Yu, Jian,Su, Fabing,&Xu, Guangwen.(2014).Intercorrelation of structure and performance of Ni-Mg/Al2O3 catalysts prepared with different methods for syngas methanation.CATALYSIS SCIENCE & TECHNOLOGY,4(2),472-481. |
| MLA | Liu, Jiao,et al."Intercorrelation of structure and performance of Ni-Mg/Al2O3 catalysts prepared with different methods for syngas methanation".CATALYSIS SCIENCE & TECHNOLOGY 4.2(2014):472-481. |
入库方式： OAI收割
来源：过程工程研究所
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