混合型Ni-W催化剂催化葡萄糖氢解制乙二醇的反应研究  

Hydrogenolysis of glucose into ethylene glycol over hybrid nickel-tungsten catalysts

作　　者：肖竹钱 毛建卫[1,2] 王珍珍 张金建[1,2] 张徐[1,2] 计建炳[3] 

机构地区：[1]浙江科技学院生物与化学工程学院,浙江杭州310023 [2]浙江省农业生物资源生化制造协同创新中心,浙江杭州310023 [3]浙江工业大学化学工程学院,浙江杭州310014

出　　处：《合成纤维工业》2016年第5期18-22,共5页China Synthetic Fiber Industry

基　　金：浙江省教育厅科研项目(Y20112088);浙江省科技计划项目(2011R09028-10)

摘　　要：将一定浓度的水合硝酸镍浸渍于分子筛(SBA-15)上,在500℃下煅烧制得不同Ni含量的自还原型单金属加氢催化剂(Ni/SBA-15),再与钨基催化剂按质量比10∶15混合,制得混合型双金属Ni-W催化剂,将其应用于葡萄糖加氢催化制备乙二醇的反应中,考察了钨基催化剂的种类、用量、Ni/SBA-15加氢催化剂中Ni含量及其用量对葡萄糖的转化率和乙二醇收率的影响。结果表明:加氢催化剂Ni/SBA-15中有金属Ni的存在,且晶体状态与Ni含量有关,钨基催化剂中WO3效果较好;葡萄糖氢解制备乙二醇的较优反应条件为葡萄糖0.5 g,水55 m L,WO30.1 g,Ni质量分数为12%的Ni/SBA-15加氢催化剂0.15 g,H2压力5.0MPa,反应温度240℃,反应时间2 h,在此条件下制得的乙二醇收率为26.0%,葡萄糖转化率为99.1%。A self-reduction monometallic hydrogenation catalyst （ Ni/SBA-15 ） was prepared with different Ni loading by im-pregnating molecular sieve SBA-15 with nickel nitrate hydrate of a specific concentration prior to calcinations at 500 ℃ and was mixed with tungsten-based catalyst at the mass ratio of 10：15 to produce a hybrid bimetallic Ni-W catalyst , which was applied in the reaction system of glucose hydrogenation into ethylene glycol .The effects of the type and amount of tungsten-based catalyst and the Ni loading and amount of Ni/SBA-15 on the conversion rate of glucose and the yield of ethylene glycol were studied .The results showed that metallic Ni existed in Ni/SBA-15 hydrogenation catalyst and its crystal state was related with Ni loading;WO3 provided a satisfying catalysis performance among the tungsten-based catalysts;the yield of ethylene glycol could be 26.0%and the conversion rate of glucose 99.1%under the conditions of 0.5 g glucose, 55 mL water, 0.1 g WO3 , 0.15 g Ni/SBA-15 hy-drogenation catalyst containing 12%Ni by mass fraction, H2 pressure 5.0 MPa, reaction temperature 240℃, reaction time 2 h.

关 键 词：葡萄糖 乙二醇 氢解 镍-钨催化剂 混合型 三氧化钨 收率 转化率 

分 类 号：TQ223.162[化学工程—有机化工]