Increasing the activity and selectivity of Co-based FTS catalysts supported by carbon materials for direct synthesis of clean fuels by the addition of chromium
文献类型：期刊论文
| 作者 | Zhao, Z; Lu, W; Feng, CH; Chen, XK; Zhu, HJ; Yang, RO; Dong, WD; Zhao, M; Lyu, Y; Liu, T |
| 刊名 | JOURNAL OF CATALYSIS
 |
| 出版日期 | 2019 |
| 卷号 | 370期号:-页码:251—264 |
| 关键词 | FISCHER-TROPSCH SYNTHESIS HIGHER ALCOHOLS MN PROMOTION CO/SIO2 OLEFINS SYNGAS HYDROGENATION CONVERSION SITES |
| ISSN号 | 0021-9517 |
| DOI | 10.1016/j.jcat.2018.12.022 |
| 文献子类 | 期刊论文 |
| 英文摘要 | Synthesis of clean transportation fuels from syngas (CO + H-2) derived from coal, natural gas, and renewable biomass is an efficient method for reducing dependence on oil reservoirs, for which developing effective catalysts is significant. Co-based catalysts supported by carbon materials possess advantages such as longer lifetimes and easy handling of wasted catalysts, but increasing their activity and selectivity remains a challenge. Here we report using Cr as a promoter to enhance the CO hydrogenation process over activated carbon (AC)-supported Co-based catalysts, namely, CoxCr/AC catalysts. An almost twofold increase in activity (from 28.9% to 47.0%), accompanied by decreased CH4, olefin, and alcohol selectivity, was achieved by adding Cr, resulting in a significant increase in the yield of transportation fuel products. The results of chemisorption indicate that Cr facilitates H-2 adsorption and suppresses the formation of cobalt carbide (Co2C), forming a relative H-rich and C-lean surface chemical environment, so that the CO hydrogenation process and C-C coupling step are enhanced. Structural characterizations show that Cr exists in the form of Cr2O3 and aggregates on the surfaces of the catalysts in a highly dispersed manner at relative low loadings (<2 wt%), and that Co nanoparticles are partly covered by Cr at high loadings. We suggest that the interaction between Cr3+ and adjacent metallic Co may play a pivotal role in the elevation of CO hydrogenation activity and C5+ selectivity. (C) 2018 Elsevier Inc. All rights reserved. |
| 语种 | 英语 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/31669]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 作者单位 | 1.Zhejiang Normal Univ, Hangzhou Inst Adv Studies, Hangzhou 311231, Zhejiang, Peoples R China; 2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China; 3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China; 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 5.Shaanxi Yanchang Petr Yulin Coal Chem Co, Yulin 719000, Shaanxi, Peoples R China; 6.Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhao, Z,Lu, W,Feng, CH,et al. Increasing the activity and selectivity of Co-based FTS catalysts supported by carbon materials for direct synthesis of clean fuels by the addition of chromium[J]. JOURNAL OF CATALYSIS,2019,370(-):251—264. |
| APA | Zhao, Z.,Lu, W.,Feng, CH.,Chen, XK.,Zhu, HJ.,...&Ding, YJ.(2019).Increasing the activity and selectivity of Co-based FTS catalysts supported by carbon materials for direct synthesis of clean fuels by the addition of chromium.JOURNAL OF CATALYSIS,370(-),251—264. |
| MLA | Zhao, Z,et al."Increasing the activity and selectivity of Co-based FTS catalysts supported by carbon materials for direct synthesis of clean fuels by the addition of chromium".JOURNAL OF CATALYSIS 370.-(2019):251—264. |
入库方式： OAI收割
来源：上海应用物理研究所
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