%0 Journal Article
%T Influence of precipitation method on the properties of precursors of CuO/ZnO/Al2O3 catalysts<br>加料方式对CuO/ZnO/Al2O3系催化剂前驱体性质的影响
%A FANG De-ren
%A LIU Zhong-min
%A LI Xiao-qiong
%A ZHANG Hui-min
%A XU Lei
%A <br>房德仁
%A 刘中民
%A 黎晓琼
%A 张慧敏
%A 许磊
%J 燃料化学学报
%D 2004
%I 
%X The influence of precipitation method on the precursors of CuO/ZnO/Al_2O_3 catalysts were studied by X-ray Diffraction, Thermogravimetry-Differential Thermogravimetry and Temperature Programmed Reduction techniques. The catalytic activity of the catalysts for methanol synthesis was tested using a differential fixed-bed reactor. It is found that the feeding method has strong influence on the Cu precursors in CuO/ZnO/Al_2O_3 catalyst. In case of base to salt, the initial precipitate was crystal Cu_2(OH)_3NO_3; while in the case of co-current, the initial phase was mainly amorphous Cu_2CO_3(OH)_2. The feed method has no effect on the initial phase composition and crystallinity of Zn-precursor and Zn_5(CO_3)_2(OH)_6 was the unique phase in the precursors. The phases of (Cu, Zn)_2CO_3(OH)_2 and (Cu, Zn)_5(CO_3)_2(OH)_6 in the precursors of the catalyst were produced from the substitution of Cu_2CO_3(OH)_2 (amorphous) and Zn_5(CO_3)_2(OH)_6. The activity of the catalyst was in the order of co-current>salt to base >base to salt.
%K CuO/ZnO/Al_2O_3 catalyst
%K precursor
%K methanol synthesis
%K activity<br>CuO／ZnO／A2O3催化剂
%K 前驱体
%K 合成甲醇
%K 活性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=6579068328FE643F&jid=C6AB115B41BD2F1616ECDB095B69B8ED&aid=2D5372F61044AD41&yid=D0E58B75BFD8E51C&vid=9971A5E270697F23&iid=B31275AF3241DB2D&sid=7F9B7E84827A650F&eid=547991B346A6585E&journal_id=0253-2409&journal_name=燃料化学学报&referenced_num=7&reference_num=7