Ce-Cu-Co/CNTs催化剂催化合成气制低碳醇及乙醇的研究
采用共浸渍法制备了不同Ce含量的Ce-Cu-Co/CNTs催化剂,考察了其在合成气制低碳醇反应中的催化性能,借助X射线衍射（XRD）、程序升温还原（H2-TPR）、N2吸脱附实验（BET）、透射电镜（TEM）和CO程序升温脱附（CO-TPD）对这些催化剂进行了表征.结果表明,当Ce的质量分数为3%时,低碳醇的时空收率和选择性达到最高,分别为696.4 mg？g-1？h-1和59.7%,其中乙醇占总醇的46.8%,适量Ce的添加能提高Cu物种在催化剂上的分散度和催化剂的还原性能,能显著地增加催化剂吸附CO的能力,促进合成醇活性位的形成,进而明显提高催化剂的活性和总醇的选择性.研究表明,将具有高活...
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| Published in | 物理化学学报 Vol. 30; no. 11; pp. 2127 - 2133 |
|---|---|
| Main Author | |
| Format | Journal Article |
| Language | Chinese |
| Published |
太原理工大学煤科学与技术教育部和山西省重点实验室,太原,030024%太原理工大学煤科学与技术教育部和山西省重点实验室，太原030024
2014
中国科学院山西煤炭化学研究所煤转化国家重点实验室，太原030001 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1000-6818 |
| DOI | 10.3866/PKU.WHXB201409121 |
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| Abstract | 采用共浸渍法制备了不同Ce含量的Ce-Cu-Co/CNTs催化剂,考察了其在合成气制低碳醇反应中的催化性能,借助X射线衍射（XRD）、程序升温还原（H2-TPR）、N2吸脱附实验（BET）、透射电镜（TEM）和CO程序升温脱附（CO-TPD）对这些催化剂进行了表征.结果表明,当Ce的质量分数为3%时,低碳醇的时空收率和选择性达到最高,分别为696.4 mg？g-1？h-1和59.7%,其中乙醇占总醇的46.8%,适量Ce的添加能提高Cu物种在催化剂上的分散度和催化剂的还原性能,能显著地增加催化剂吸附CO的能力,促进合成醇活性位的形成,进而明显提高催化剂的活性和总醇的选择性.研究表明,将具有高活性和高碳链增长能力的CuCo基催化剂与碳纳米管的限域效应结合,可实现缩窄产物分布、大幅度提高乙醇选择性的目的. |
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| AbstractList | O643; 采用共浸渍法制备了不同Ce含量的Ce-Cu-Co/CNTs催化剂，考察了其在合成气制低碳醇反应中的催化性能，借助X射线衍射(XRD)、程序升温还原(H2-TPR)、N2吸脱附实验(BET)、透射电镜(TEM)和CO程序升温脱附(CO-TPD)对这些催化剂进行了表征.结果表明，当Ce的质量分数为3%时，低碳醇的时空收率和选择性达到最高，分别为696.4 mg?g-1?h-1和59.7%，其中乙醇占总醇的46.8%，适量Ce的添加能提高Cu物种在催化剂上的分散度和催化剂的还原性能，能显著地增加催化剂吸附CO的能力，促进合成醇活性位的形成，进而明显提高催化剂的活性和总醇的选择性.研究表明，将具有高活性和高碳链增长能力的CuCo基催化剂与碳纳米管的限域效应结合，可实现缩窄产物分布、大幅度提高乙醇选择性的目的. 采用共浸渍法制备了不同Ce含量的Ce-Cu-Co/CNTs催化剂,考察了其在合成气制低碳醇反应中的催化性能,借助X射线衍射（XRD）、程序升温还原（H2-TPR）、N2吸脱附实验（BET）、透射电镜（TEM）和CO程序升温脱附（CO-TPD）对这些催化剂进行了表征.结果表明,当Ce的质量分数为3%时,低碳醇的时空收率和选择性达到最高,分别为696.4 mg？g-1？h-1和59.7%,其中乙醇占总醇的46.8%,适量Ce的添加能提高Cu物种在催化剂上的分散度和催化剂的还原性能,能显著地增加催化剂吸附CO的能力,促进合成醇活性位的形成,进而明显提高催化剂的活性和总醇的选择性.研究表明,将具有高活性和高碳链增长能力的CuCo基催化剂与碳纳米管的限域效应结合,可实现缩窄产物分布、大幅度提高乙醇选择性的目的. |
| Abstract_FL | A series of Ce-Cu-Co/carbon nanotubes (CNTs) catalysts with different Ce contents were prepared by co-impregnation, and the catalytic performance was investigated for the synthesis of higher alcohols from syngas. The catalysts were characterized by X-ray diffraction (XRD), temperature-programmed reduction of H2 (H2-TPR), N2 adsorption-desorption isotherms (BET), transmission electron microscopy (TEM), and temperature-programmed desorption of CO (CO-TPD). The results showed that at a Ce content of 3%the catalyst had the highest catalytic activity. The formation rate and selectivity of alcohol reached 696.4 mg?g-1?h-1 and 59.7%, where the mass fraction of ethanol was 46.8%of the total amount of alcohols. The addition of an appropriate amount of Ce facilitated the dispersion of Cu and promoted reduction of the catalysts. It also markedly increased the adsorption capacity for CO, and significantly improved the formation of active sites for alcohols, which is favorable for the catalytic activity and to improve the selectivity of alcohols. Research showed that combining the CuCo-based catalyst, which has high activity and a high ability of carbon chain growth, with the confinement effect of CNTs can result in a narrow distribution of alcohols and significantly improve the selectivity of ethanol. |
| Author | 韩涛 黄伟 王晓东 唐钰 刘双强 游向轩 |
| AuthorAffiliation | 太原理工大学煤科学与技术教育部和山西省重点实验室,太原030024 中国科学院山西煤炭化学研究所煤转化国家重点实验室,太原030001 |
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| Author_FL | LIU Shuang-Qiang HAN Tao HUANG Wei TANG Yu YOU Xiang-Xuan WANG Xiao-Dong |
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| Copyright | Copyright © Wanfang Data Co. Ltd. All Rights Reserved. |
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| DOI | 10.3866/PKU.WHXB201409121 |
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| DocumentTitleAlternate | Study of Ce-Cu-Co/CNTs Catalysts for the Synthesis of Higher Alcohols and Ethanol from Syngas |
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| EndPage | 2133 |
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| Keywords | Ce 乙醇 Ethanol CuCo/CNTs催化剂 Higher alcohol CuCo/CNTs catalyst 低碳醇 合成气 Syngas |
| Language | Chinese |
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| Notes | 11-1892/06 HAN Tao, HUANG Wei, WANG Xiao-Dong, TANG Yu, LIU Shuang-Qiang, YOU Xiang-Xuan （1.Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, P R. China; 2.State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, P R. China） A series of Ce-Cu-Co/carbon nanotubes （CNTs） catalysts with different Ce contents were prepared by co-impregnation, and the catalytic performance was investigated for the synthesis of higher alcohols from syngas. The catalysts were characterized by X-ray diffraction （XRD）, temperature-programmed reduction of H2 （H2-TPR）, N2 adsorption-desorption isotherms （BET）, transmission electron microscopy （TEM）, and temperature-programmed desorption of CO （CO-TPD）. The results showed that at a Ce content of 3% the catalyst had the highest catalytic activity. The formation rate and selectivity of alcohol reached 696.4 mg .g-＇. h-1 and 59.7%, where the mas |
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| PublicationTitle | 物理化学学报 |
| PublicationTitleAlternate | Acta Physico-Chimica Sinica |
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| PublicationYear | 2014 |
| Publisher | 太原理工大学煤科学与技术教育部和山西省重点实验室,太原,030024%太原理工大学煤科学与技术教育部和山西省重点实验室，太原030024 中国科学院山西煤炭化学研究所煤转化国家重点实验室，太原030001 |
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| Snippet | 采用共浸渍法制备了不同Ce含量的Ce-Cu-Co/CNTs催化剂,考察了其在合成气制低碳醇反应中的催化性能,借助X射线衍射（XRD）、程序升温还原（H2-TPR）、N2吸脱附实验（BET）、透射... O643; 采用共浸渍法制备了不同Ce含量的Ce-Cu-Co/CNTs催化剂，考察了其在合成气制低碳醇反应中的催化性能，借助X射线衍射(XRD)、程序升温还原(H2-TPR)、N2吸脱附实验(BET)、透... |
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| SubjectTerms | Ce CuCo/CNTs催化剂 乙醇 低碳醇 合成气 |
| Title | Ce-Cu-Co/CNTs催化剂催化合成气制低碳醇及乙醇的研究 |
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