碱纤维素催化加氢制C2~C3多元醇的研究化学工艺专业论文.docxVIP

temperature range; the FTIR results showed that the ionic liquid coating on the metal in the form of physical adsorption to prevent oxidation and agglomeration of the Ru nanoparticles. Comprehensively, in the process of synthesis of Ru nanoparticles, the ionic liquids in the form of physical adsorption rather than chemical action coating on the metal surface play a role as dispersing agent and protective agent. The ionic liquid [Bmim] PF6 and [Bmim] BF4 stabilited Ru nanoparticles were obtained with smaller particle size and good dispersion, and the ionic liquid [Bmim] Cl and [HO-emim] Cl stabilited Ru nanoparticles also had a molecular diameter of less than 5 nm, but the dispersion was poor. The nano-ruthenium catalysts in alkali cellulose hydrogenolysis system for the optimization of reaction conditions were investigated. Investigated factors including reaction temperature, reaction time, amount of catalyst and so on. According to the analysis of the previous characterization results and reaction products, the using of Ru/[Bmim]BF4 catalyst revealed a good performance. The optimal reaction conditions for the hydrogenolysis reaction is operated at 433 K for 5 h, resulting a better conversion and C2~C3 polyol selectivity which in the case of the conversion rate of 63.78 %, glycerol, 1,2-propylene glycol and ethylene glycol selectivity, respectively, 18.37 % , 22.55 % and 17.99 % respectively. KEY WORDS：alkali cellulose, hydrogenolysis, polyols, ionic liquids, nano-metal catalyts 目 录 HYPERLINK \l _bookmark0 前 言1 HYPERLINK \l _bookmark1 第一章 文献综述2 HYPERLINK \l _bookmark2 1.1 纤维素概述2 HYPERLINK \l _bookmark3 1.1.1 纤维素的组成和结构2 HYPERLINK \l _bookmark4 1.1.2 纤维素的性质3 HYPERLINK \l _bookmark5 1.1.3 纤维素的预处理4 HYPERLINK \l _bookmark6 1.2 离子液体稳定的金属纳米粒子催化剂9 HYPERLINK \l _bookmark7 1.2.1 离子液体在制备金属纳米粒子催化剂中的优势9 HYPERLINK \l _bookmark8 1.2.2 离子液体保护的金属纳米粒子催化剂的应用10 HYPERLINK \l _bookmark9 1.3 纤维素催化加氢制备多元醇12 HYPERLINK \l _bookmark10 1.3.1 纤维素催化加氢制备六元醇12 HYPERLINK \l _bo