文献类型：期刊文献

中文题名：草酸二甲酯加氢制乙二醇Cu/SiO_2催化剂的制备与改性

英文题名：Preparation and modification of Cu/SiO_2 catalyst for hydrogenation of dimethyl oxalate to ethyl glycol

作者：黄维捷[1];文峰[1];康文国[1];李伟[1]

机构：[1]华东理工大学国家重点实验室,上海200237

年份：2008

卷号：16

期号：6

起止页码：13

中文期刊名：工业催化

外文期刊名：Industrial Catalysis

收录：CSTPCD

语种：中文

中文关键词：催化化学;Cu/SiO2催化剂;草酸二甲酯加氢;乙二醇;催化剂制备;均匀沉淀法

外文关键词：catalytic chemistry ; Cu/SiO2 catalyst; dimethyl oxalate hydrogenation ; ethyl glycol ; catalyst preparation ; homogeneous deposition-precipitation

摘要：采用均匀沉淀沉积法制备Cu/SiO2催化剂。考察了Cu2+浓度、洗涤条件及铜与硅物质的量比等的影响,并通过BET和XRD等表征手段研究分析,结果表明,前驱体制备过程及条件对催化剂结构和活性有较大影响。低Cu2+浓度、醇洗干燥均有利于形成大孔径高活性的催化剂。铜与硅物质的量比对反应活性的影响较大,存在一个最佳值,在0.4时活性最高。最优条件下制得的催化剂用于草酸二甲酯加氢制乙二醇,在反应温度205℃、压力2 MPa、n(H2)∶n(DMO)=80和空速1.0 h-1条件下,草酸二甲酯的转化率为100%,乙二醇选择性为99.1%,乙醇酸甲酯选择性为0.9%,无其他副产物生成。
Cu/SiO2 catalysts were prepared by homogeneous deposition-precipitation of the mixture of aqueouscuprammonia complex and silica sol, accompanied by heating to remove ammonia. The influence of Cu^2＋ concentration, washing condition and copper loadings （ copper-silica molar ratio） were investigated and characterized by BET and XRD. It was shown that preparation condition of the precursor had much influence both on the structure and activity of the catalysts. It was found that low Cu^2＋ concentration and alcohol washing favored formation of mesopore catalysts with high activity, and the catalyst exhibited optimal performance at copper/silica molar ratio of 0.4. The catalyst prepared under optimal condition was used for dimethyl oxalate （DMO） hydrogenation under the following condition： 205 ℃, 2 MPa, n（ H2 ） ： n（DMO） = 80 and LHSV = 1.0 h^-1. DMO conversion of 100%, selectivity to ethyl glycol （EG） of 99.1% and selectivity to methyl glycollate （MG） of 0.9% were obtained, without formation of other by-products.