Fe、Co组成对Cu-Fe-Co基混合醇催化剂合成性能的影响

引用本文: 郭海军, 熊莲, 罗彩容, 丁飞, 陈新德, 陈勇. Fe、Co组成对Cu-Fe-Co基混合醇催化剂合成性能的影响[J]. 物理化学学报, 2011, 27(11): 2632-2638. doi: 10.3866/PKU.WHXB20111114 shu

Citation: GUO Hai-Jun, XIONG Lian, LUO Cai-Rong, DING Fei, CHEN Xin-De, CHEN Yong. Effect of Fe/Co Mass Ratio on Catalytic Performances of Cu-Fe-Co Based Catalysts for Mixed Alcohols Synthesis[J]. Acta Physico-Chimica Sinica, 2011, 27(11): 2632-2638. doi: 10.3866/PKU.WHXB20111114 shu

Fe、Co组成对Cu-Fe-Co基混合醇催化剂合成性能的影响

基金项目:
广州市科技计划项目(2008Zi-D021) (2008Zi-D021)

中国科学院可再生能源与天然气水合物重点实验室基金项目(y107jd1001)资助. (y107jd1001)

摘要: 采用共浸渍法制备了一系列不同Fe、Co组成的Cu-Fe-Co 基混合醇催化剂, 对其CO加氢合成混合醇反应性能进行了考察, 并采用BET比表面积分析、X射线衍射(XRD)、X射线光电子能谱(XPS)、场发射扫描电子显微镜(FE-SEM)及H₂程序升温还原(H₂-TPR)等手段对其进行了表征. 结果表明: Cu-Fe 二元催化剂添加适量的Co可以明显提高催化剂醇的时空收率(STY)、CO转化率, 而总醇选择性不变. 当活性组分Cu、Fe及助剂Co的质量分数分别为25%、22%、3%时, 催化剂醇的时空收率高达205.6 g·kg^-1·h^-1, CO转化率为56.6%. XRD、XPS和TPR结果表明: 在Cu组分含量不变时, 少量Co组分的引入使催化剂表面形成微量的CuFe₂O₄相, 促进了Cu-Fe 组分间相互作用的增强, 改善了催化剂活性组分的分散度, 有利于提高催化剂活性及醇的时空收率;随Co含量的增大, 催化剂中金属组分间的相互作用发生转变, 形成了Cu-Co尖晶石相, 导致催化剂的醇选择性有所下降.

关键词:

English

Effect of Fe/Co Mass Ratio on Catalytic Performances of Cu-Fe-Co Based Catalysts for Mixed Alcohols Synthesis

1.
1. Key Laboratory of Renewable Energy and Natural Gas Hydrate, Chinese Academy of Sciences, Guangzhou 510640, P. R. China;
2. Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, P. R. China;
3. Guangzhou Branch of Chinese Academy of Sciences, Guangzhou 510640, P. R. China
Received Date: 17 May 2011
Available Online: 27 October 2011
Fund Project:
广州市科技计划项目(2008Zi-D021)

中国科学院可再生能源与天然气水合物重点实验室基金项目(y107jd1001)资助.

Abstract: A series of Cu-Fe-Co based catalysts with different mass fractions of Fe and Co were prepared by co-impregnation method. The catalytic performances of the catalysts for mixed alcohols synthesis from carbon monoxide hydrogenation were investigated in a fixed bed flow reactor. The samples were characterized by Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field-emission scanning electron microscope (FE-SEM), and H₂ temperature-programmed reduction (H₂-TPR). The results showed that the addition of a suitable content of Co to the Cu-Fe based catalyst significantly improved the space-time yield (STY) and CO conversion while alcohol selectivity was constant. For the catalyst with a mass fraction of Cu, Fe, and Co of 25%, 22%, and 3%, respectively, a STY of 205.6 g·kg^-1·h^-1 and CO conversion of 56.6% were obtained. The XRD, XPS, and TPR results showed that when the Cu content was unchanged, the introduction of some Co contributed to the formation of a small quantity of the CuFe₂O₄ phase on the surface of catalysts, which promoted the interaction between Cu and Fe, improved the dispersion of active components and enhanced the catalytic activity and STY of the mixed alcohols. With an increase of the Co content in the catalyst, the interaction between the metallic components was transformed and the Cu-Co spinel phase was generated, leading to a slight decrease of alcohol selectivity.

Key words:

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沈阳化工大学材料科学与工程学院沈阳 110142

Fe、Co组成对Cu-Fe-Co基混合醇催化剂合成性能的影响

English

Effect of Fe/Co Mass Ratio on Catalytic Performances of Cu-Fe-Co Based Catalysts for Mixed Alcohols Synthesis

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

Fe、Co组成对Cu-Fe-Co基混合醇催化剂合成性能的影响

English

Effect of Fe/Co Mass Ratio on Catalytic Performances of Cu-Fe-Co Based Catalysts for Mixed Alcohols Synthesis

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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