低温液相合成甲醇用铜铬硅催化剂的制备与表征  

Preparation and Characterization of Cu-Cr-Si Catalysts for Methanol Synthesis at Low Temperature in Slurry Phase

作　　者：何川华[1] 储伟[1] 王奎铃[1] 罗仕忠[1] 吴玉塘[1] 邱发礼[1] 

机构地区：[1]中国科学院成都有机化学研究所,四川成都610041

出　　处：《合成化学》2001年第4期322-325,共4页Chinese Journal of Synthetic Chemistry

基　　金：国家自然科学基金 ( 2 990 30 11) ; "973"计划国家重点基础研究 ;四川省青年科技基金会青年学术带头人培养计划 ( 4 5 9)资助项目

摘　　要：采用共沉淀方法制备了一种含 Cu,Cr,Si三种组分的复合氧化物催化剂用于低温液相合成甲醇。用TG-DTG对催化剂前体做了表征 ,用 XRD,BET,H2 -TPR,松装比测试等方法对合成用催化剂作了系列表征并在间歇式高压反应釜中考察了催化剂的活性、选择性和稳定性。结果表明 :铜铬硅催化剂的反应活性、选择性和稳定性都明显优于铜铬催化剂。其前体中只具有一个高温热不稳定体 ,而铜铬催化剂中具有低温和高温两个热不稳定体。两种催化剂都以无定型形存在 :加入硅后得到的铜铬硅催化剂结构更加疏松、比表面积更大 ,其H2The Cu-Cr and Cu-Cr-Si catalysts were prepared and characterized by XRD,H 2 TPR. The precursors of the catalysts were characterized by TG DTG. The activity, stability and selectivity of the catalysts for methanol synthesis at low temperature in slurry phase were evaluated in a 500mL stainless steel autoclave reactor with magnetical stirrer. Due to the effect of Si, the peak temperature of Cu-Cr-Si in the H 2 TPR curves became lower than that of Cu-Cr catalysts and the Cu-Cr-Si catalyst exhibited higher activity, stability and selectivity than Cu-Cr catalyst.

关 键 词：低温液相合成 催化剂 甲醇 催化活性 铜 铬 硅 复合氧化物 制备 表征 合成气 

分 类 号：TQ223.121[化学工程—有机化工] O643.36[理学—物理化学]