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《Chinese Journal of Catalysis》 2011-02
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Effect of La and Mn Promoters on Structure and Performance of CuZr Catalyst Prepared by Complete Liquid-Phase Technology

GAO Zhihua,HUANG Wei,YIN Lihua,XIE Kechang Key Laboratory of Coal Science and Technology of Ministry of Education and Shanxi Province, Taiyuan University of Technology,Taiyuan 030024,Shanxi,China  
A CuZr slurry catalyst promoted by La and Mn additives was prepared by complete liquid-phase technology. The performance of the catalyst for direct synthesis of dimethyl ether from syngas was evaluated in a slurry reactor. The catalyst was characterized by NH3 temperature-programmed desorption,powder X-ray diffraction,N2 adsorption-desorption,X-ray photoelectron spectroscopy,and H2 tempera-ture-programmed reduction. The results indicated that the addition of La and Mn promoters to the CuZr slurry catalyst effectively improved the active metal dispersibility and increased the catalyst surface area. The presence of La and Mn also increased the surface vacancy of ZrO2,improved the number of highly dispersed CuO and reducible CuO,and thereby enhanced the interaction between Cu and Zr. Consequently,the catalyst activity was obviously increased.
【Fund】: 国家自然科学基金(20706039);; 2010年山西省高等学校优秀青年学术带头人支持计划;; 山西省开放基金(2009011059-13)
【CateGory Index】: O643.32
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