助剂Zr对浆态床合成气/CO2制甲醇铜基催化剂性能的影响  

Effect of Zr on performance of CuO/ZnO/Al_2O_3 catalyst for synthesis of methanol from syngas/CO_2 in a slurry reactor

作　　者：肖艳[1] 马凤云[1] 莫文龙[1] 王晔[1] 钟梅[1] 刘景梅[1] 肖峰[1] 李忠[2] 张静 马空军[1] 

机构地区：[1]新疆大学化学化工学院,煤炭洁净转化与化工过程自治区重点实验室,新疆乌鲁木齐830046 [2]太原理工大学煤化工研究所,煤科学与技术教育部和山西省重点实验室,山西太原030024 [3]新疆庆华能源集团有限公司,新疆伊宁835100

出　　处：《天然气化工—C1化学与化工》2015年第5期1-4,23,共5页Natural Gas Chemical Industry

基　　金：乌鲁木齐市科学技术计划项目(G131010001)

摘　　要：采用并流共沉淀法,以Na2CO3为沉淀剂,制备了Cu O/Zn O/Al2O3(CZA)和Zr-Cu O/Zn O/Al2O3(Zr-CZA)催化剂,对其进行了BET、XRD、FT-IR和SEM表征,并考察了其在浆态床中由合成气/CO2合成甲醇的催化性能。结果表明,Zr-CZA催化剂的比表面积达176.19m2·g-1,高于CZA催化剂的89.11m2·g-1;所制备的前驱体均发生了同晶取代反应,生成了活性物相锌孔雀石和绿铜锌矿,且Zr-CZA催化剂还原后的XRD峰更为弥散,说明其活性组分铜的晶粒尺寸更小;Zr-CZA催化剂的CO转化率明显高于CZA催化剂,且在566h的寿命试验中稳定性良好,失活速率仅为0.103%/d。CuO/ZnO/Al2O3 （CZA） and Zr-CuO/ZnO/A1203 （Zr-CZA） catalysts were prepared by parallel current co-precipitation method, and characterized by XRD, FT-IR, SEM and BET. The performances of the catalysts for synthesis of methanol from syngas/ CO., were investigated in a slurry reactor. Results showed that？the specific surface area of catalyst Zr-CZA was up to 176.19m2.g-1, much higher than that of catalyst CZA （89.11m2 .g-1）; the isomorphous substitution reactions occurred in the precursors of both catalysts, generating active phase of rosasite and aurichatcite; XRD peaks of reduced Zr-CZA were more diffused, which indicated that its grain size of copper was smaller; and Zr-CZA obviously had higher CO conversion than CZA, and showed good stability in the life test of 566h with a deactivation rate of only 0.103%/d.

关 键 词：浆态床 合成气 二氧化碳 甲醇合成 铜基催化剂 锆助剂 

分 类 号：O643[理学—物理化学] TQ426[理学—化学]