片状ZnO形貌对Co/ZnO催化剂性能影响  

Effects of morphology of plate-like ZnO on performance of Co /ZnO catalysts

作　　者：杨守斌[1] 邸琬茗[1] 宁文生[1] 刘潜潜 金杨福[2] 

机构地区：[1]浙江工业大学化学工程学院,浙江杭州310032 [2]浙江工业大学材料科学与工程学院,浙江杭州310032

出　　处：《现代化工》2014年第6期101-104,共4页Modern Chemical Industry

基　　金：浙江省自然科学基金(Y14B030012);国家科技支撑计划(2014BAD02B05)

摘　　要：采用水热法合成ZnO,并由浸渍法制备Co/ZnO催化剂。利用X-射线衍射、扫描电子显微镜和低温N2-物理吸附等对样品进行表征,由固定床反应装置测试了催化剂的费托合成反应性能。水热合成温度为100℃时,所得ZnO的优势晶面为极性面,他促进了Co/ZnO催化剂的还原,提高了其反应活性,说明Co/ZnO催化剂的费托合成反应性能对ZnO形貌有较强的依赖。Two kinds of plate-like ZnO are hydrothermally synthesized from zinc acetate and hexamethylene tetramine by tuning the reaction temperature.The morphology and structure of the obtained ZnO are characterized by scanning electron microscopy （SEM）,X-ray diffraction （XRD） and low temperature N2 adsorption.According to the intensity ratio of （002） to （100） in the XRD patterns,the ZnO synthesized at 100℃ （Z100） is rich of polar facet on the surface,while the ZnO synthesized at 140℃ （Z140） is mainly composed by nonpolar facet.The specific surface area of Z100 （6.63 m2/g） is only about one half of Z140 （13.50 m2/g）.Co/ZnO catalysts are prepared by wetness impregnation method using two kinds of ZnO as supports,respectively.Catalyst CZ100 is more active than CZ140 in Fischer-Tropsch synthesis measured by fixed-bed reactor,which is attributed to small size of Co3 O4 particles deposited on the polar facet.

关 键 词：氧化锌 水热法 极性面 钴催化剂 费托合成 

分 类 号：O643.36[理学—物理化学]