铜、锌、铝、锆物质的量比对CuO-ZnO-Al_2O_3-ZrO_2系催化剂催化CO_2加氢合成甲醇的影响  

Influence of Cu,Zn,Al,Zr Mole Proportion on CuO-ZnO-Al_2O_3-ZrO_2 Catalysts for the Hydrogenation of CO_2 to Methanol

作　　者：韩冲[1,2] 高文桂[1,2] 王华[1,2] 覃志强[1,2] 郭伟[1,2] 张明宇[1,2] 

机构地区：[1]昆明理工大学冶金节能减排教育部工程研究中心,昆明650093 [2]云南省复杂有色金属资源清洁利用国家重点实验室(培育基地),昆明650093

出　　处：《材料导报》2012年第24期89-92,共4页Materials Reports

基　　金：国家自然科学基金重点研究计划项目(90616635);国家科技支撑计划(2011BAC01B03);昆明理工大学分析测试基金(2011217)

摘　　要：采用并流共沉淀法制备了各组分不同物质的量比的CuO-ZnO-Al2O3-ZrO2催化剂,考察各组分物质的量比对该系列催化剂前驱体及催化剂的影响。运用X射线衍射(XRD)、H2程序升温还原(H2-TPR)技术、热重-微分热分解(TG-DTG)实验分析等手段对其进行表征分析,并在固定床连续流动反应器中利用组成为V(H2)/V(CO2)=3.0的混合气,在T=250℃、P=3.0MPa、GHSV=3000h-1反应条件下对CuO-ZnO-Al2O3-ZrO2系列催化剂进行了催化CO2加H2合成甲醇的活性评价实验。结果表明:该系列催化剂在抑制Zn2+取代Cu2+方面表现良好,当n(Cu)∶n(Zn)∶n(Al)∶n(Zr)为0.45∶0.45∶0.02∶0.08时催化剂体现的还原性和活性最佳。To investigate the effects of mole ratio of Cu, Zn, Al, Zr on the CuO-ZnO-Al2O3-ZrO2 catalyst and its precursor sysmtemically, a series of CuO-ZnO-Al2O3-ZrO2 composite catalysts with different mole proportions were prepared by co-current co-precipitation method. The catalysts and their precuisors were characterised by XRD, H2-TPR and TG-DTG, and the series of CuO-ZnO-Al2O3 genation of CO2 to methanol was further evaluated using a ZrO2 composite catalysts catalytic performance for hydro- feed mixed gas composed of V（H2 ）/（CO2）=3.0. All of the process was proceed in a laboratory fixed-bed reactor system, and under the condition of T= 250℃, P= 3.0MPa, GHSV=3000h-1. The results demonstrate that CuO-ZnO-Al2O3-ZrO2 composite catalysts can restrain Zn2＋ from replacing Cu2＋ ,and the catalyst shows excellent reduction qualification and catalytic activity when the Cu, Zn, Al, Zr mole ratio was 0.45 ： 0. 45 ： 0.02 ： 0. 08.

关 键 词：二氧化碳 加氢 甲醇 CuO-ZnO-Al2O3-ZrO2催化剂 

分 类 号：O643[理学—物理化学]