乙烷一步直接制环氧乙烷催化剂的研毕业论文.doc

学校代码 10345 　　 研究类型 基础研究 硕 士 学 位 论 文 题 目: 乙烷一步直接制环氧乙烷催化剂的研究 学 科 专 业: 物　理　化　学 年 级: 2006级 学 号: 　2006210408　 研 究 生: 指导教师:  The Study on the Catalyst of Direct Oxidation Ethane to Ethylene Oxide This Thesis Submitted to Zhejiang Normal Unversity for the requirements for the degree of Master of Science by Bin-fu Wu Supervised by Ass. Prof. Ying Wu Prof. Ting-hua Wu Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces Institute of Physical Chemistry Zhejiang Normal University April 2009 乙烷一步直接制环氧乙烷催化剂的研究 摘 要 环氧乙烷（EO）工业仅次于聚乙烯和聚氯乙烯的重要有机化工产品，用途广泛的合成中间体目前在工业生产中，环氧乙烷是由乙烯氧化获得乙烯是石脑油乙烷裂解制得的。乙烷高温裂解制乙烯的温度通常在900 ℃以上，乙烯直接氧化制环氧乙烷的反应温度一般在200 ℃~300 ℃之间，由于两者温差很大，使得在目前条件下不可能由乙烷一步氧化直接制环氧乙烷。 ） ℃下具有较好的催化性能，在实验条件下乙烯的收率可达25 %。在此基础上，我们将纳米氧化镍催化剂和乙烯环氧化的银催化剂进行“一步两段法”研究，在相同的反应温度下让乙烷先后通过这两种催化剂，结果表明由乙烷可直接制得环氧乙烷。 本论文又采用均匀沉淀法制得复合Ag-Ni-O催化剂可以催化乙烷直接制得环氧乙烷本论文还对复合Ag-Ni-O催化剂 THE STUDY ON THE CATALYST OF DIRECT OXIDATION ETHANE TO ETHYLENE OXIDE ABSTRACT Ethylene oxide as derivatives of ethylene industury is an important organic chemical products and wildely used as organic synthetic intermediate. In the industrial process ethylene oxide is obtained through epoxidation of ethylene which is obtained through steam cracking of ethane or naphtha. Generally, the preparation temperature of ethylene by high temperature cracking of ethane is above 900 ℃, but the preparation temperature of ethylene oxide by direct oxidation of ethylene is between 200 ℃ and 300 ℃. The great temperature difference makes it impossible to synthesize ethylene oxide by direct oxidation of ethane. Nanoscaled nickel oxide can greatly reduce the reaction temperature of oxidation dehydrogenation of ethane. In this paper we firstly investigate low-temperature oxidation of ethane to ethylene using nanosized nickel oxide as catalyst in order to reduce the reaction temperature. The result indicated that under 350 ℃ the catalyst prepared in optimum conditions showed bett