An EFFect of Carrier on Cu Mn Catalyst Properties in Methanol Synthesis

实验证实CuMn甲醇合成催化剂的载体采用SIO2比Al2O3性能更好，并探讨了催化过程的原理。It is shown by the experiments that SiO 2·Al 2O 3, as the Cu Mn catalyst carrier in methanol synthesis, has better properties.The catalysis mechanism was also sought

Study on CO_2 catalytic hydrogenation For methanol synthesis

用TPd、TPSr-MS活性评价等方法，用Cu-zn-Al催化剂，对CO2加氢合成甲醇的原料气掺入适量CO进行了研究。结果表明，CO能占据催化剂表面部分CO2的吸附位，能抑制CO2加氢的逆水汽变换反应和促进甲醇含成，从而大大提高了CO2加氢合成甲醇的选择性和收率。The eFFects of CO on methanol synthesis From CO2 hydrogenation using Cu-Zn-Al as catalysts were studied by TPD,TPSR-MS techniques and catalytic per Formance evaluation method.The results indicated that CO could occupy some of the CO2 adsorption sites on the catalyst surFace, suppress the reverse water-gas shiFt reaction and promote methanol synthesis, thereFore methanol selectivity with CO2 conversion increased obviously.香港研究基金!RGC/96-97/02;厦门大学固体表面物理化学国家重点实验资

表征催化剂性能的动力学色谱微机系统 1.乙烯环氧化银催化剂的表征

一、前言评价催化剂质量的优劣,需要测定催化剂的动力学性能(活性、选择性等),且常常是用气相色谱仪来检测反应物和产物各组份的峰面积,然后选用适当的定量方法计算出各组份的定量数据,再根据反应的计量关系计算出催化剂的活性、选择性等数值.为了简化这种处理手续,我们将动力学色谱系统与微机联机,实现数据采集、处理过程的全自动化,大大提高了工作效率

CH_4/CO_2重整Ni基催化剂制备与催化性能的关系

用四种浸渍程序制备Ｎｉ－Ｍｇ／γ－Ａｌ２Ｏ３催化剂，其ＣＨ４／ＣＯ２重整制合成气的活性和积炭量的测试表明真空浸渍法最好，其次是二次不等量浸渍。现场ＣＯ歧化和ＣＨ４解离积炭实验表明，Ｎｉ基催化剂的积炭主要从反应生成物ＣＯ的歧化而

低温低压二步法合成甲醇

二步法合成甲醇 ,其第一步是甲醇羰基化合成甲酸甲酯 ;第二步是甲酸甲酯氢解合成甲醇。二步反应的优点是使反应温度和压力降低、选择性提高、产物甲醇不含水 ,使提纯容易。从而低能耗、高产率地合成甲

丙烷氧化脱氢催化剂V_2O_5/MPO_4(M=Al,Zr,Ca)的研究

制备了３种磷酸盐（ＭＰＯ４，Ｍ＝Ａｌ，Ｚｒ，Ｃａ）载体，并在其上负载０．６％～６．０％的Ｖ２Ｏ５．活性评价结果表明，负载型Ｖ２Ｏ５／ＭＰＯ４催化剂在丙烷氧化脱氢反应中具有良好的催化性能．丙烯选择性按Ｖ２Ｏ５／Ｃａ３（ＰＯ４）２＞Ｖ２Ｏ５／Ｚｒ３（ＰＯ４）４＞Ｖ２Ｏ５／ＡｌＰＯ４顺序降低，这与载体的碱性强弱顺序变化一致．载体的性质和钒的负载量影响催化剂的氧化还原性能．ＥＳＲ结果表明，Ｖ４＋离子能可逆存在于催化剂中，暗示Ｖ５＋／Ｖ４＋氧化还原偶参与了氧化还原反

高分散度铜基甲醇合成催化剂的研究

高分散度铜基甲醇合成催化剂的研究李基涛高利珍张伟德陈明树（厦门大学化学系物理化学研究所361005）70年来甲醇合成催化剂被广泛关注，特别是60年代后期英国ICI公司发明低温低压铜基甲醇合成催化剂以来，人们对铜基甲醇合成催化剂的制备与表征进行了深入地...国家自然科学基金;固体表面物理化学国家重点实验室资

Effect of ZnO on Cu/ZnO/Al_2O_3 catalysts for methanol synthesis

[中文文摘]用高速碰撞共沉淀法制备m(CuO) /m(ZnO) /m(Al2 O3 )比分别为 60 /3 0 /1 0和 3 0 /60 /1 0的 1 #和 2 #催化剂 ,结果表明高ZnO的 2 #催化剂活性较好 ,分散度较大。XPS测试表明 2 #催化剂表面ZnO吸附的中间体 (CHx 或CHxO)较多且表面的Cu+1浓度较高 ,从而促进CO加氢合成甲醇的活性。[英文文摘]Cu/ZnO/Al_2O_3 catalysts with ratios of 60/30/10 and 30/60/10 have been prepared by high speed collision coprecipitation method. The performance of the catalyst with the higher ZnO content shows the higher activity in methanol synthesis. The characterization results indicated that the catalyst with the higher ZnO content has higher dispersion. On the surface of the higher ZnO content catalyst, there was more Cu+1 and more intermediate (CH_x and CH_xO) adsorpted. It is beneficial for the CO hydrogenating to produce methanol

Temperature Programmed Decomposition of NO over Er 2O 3/Bi 2O 3 Catalysts

nOX是造成大气污染的化学物质之一，因此，消除nOX是环境保护的一项重要任务.目前比较成熟的消除nOX工艺是用氨为还原剂和V2O5/TIO2为催化剂的选择催化还原（SCr）法［1］，但其成本过高.其后发展了用CH4等低碳烷烃作还原剂，在O2共存下用C...The Face centered cubic(Fcc) phases of n (Er 2O 3)/ n (Bi 2O 3)=5%￣40%, molar Fraction) which is an oxygen ion conductor were prepared.The decomposition of NO over these Er 2O 3/Bi 2O 3 catalysts was examined by means of temperature programmed surFace reaction.The results showed that the surFace adsorbed NO decomposed to N 2 and O 2 at ca.600 ℃.The plot of NO conversion and Er composition showed that there was an optimum decomposition rate at ca.23%(molar Fraction).Comparing to the data of conductivity, one can conclude that the rate of NO decomposition increases with the increase in the number of oxygen vacancies.This has been contributed to the similar electronic structure between O 2 and NO.国家自然科学基金;香港研究基