高效甲醇水蒸气重整制氢的SBA-15改性的Cu/ZnO/Al_2O_3催化剂  

Highly Effective Hydrogen Production from Steam Reforming of Methanol over SBA-15-modified Cu/ZnO/Al_2O_3 Catalysts

作　　者：姚成漳[1] 张新荣[1] 王路存[1] 曹勇[1] 戴维林[1] 范康年[1] 吴东[2] 孙予罕[2] 

机构地区：[1]复旦大学化学系上海市分子催化与功能材料重点实验室,上海200433 [2]中国科学院山西煤炭化学研究所煤转化国家重点实验室,太原030001

出　　处：《化学学报》2006年第3期269-272,共4页Acta Chimica Sinica

基　　金：国家自然科学基金(Nos.20473021;20203003);国家基金委创新群体基金(No.20421303);国家重点基础发展规划(No.2003CB615807);上海市科技启明星计划(No.02QA14006)资助项目

摘　　要：以介孔SBA-15为结构助剂,制备出用于甲醇水蒸气重整制氢的新型高效氧化硅掺杂的Cu/ZnO/Al2O3催化剂,并与传统Cu/ZnO/Al2O3催化剂在相同条件下的催化性能进行了比较.结果表明,添加适量介孔SBA-15可显著提高催化剂的催化活性和选择性,在大幅度提高甲醇转化率的同时有效降低了重整产气中CO的含量.原位XRD分析证实适量介孔SBA-15的添加对传统Cu/ZnO/Al2O3催化剂的微结构性质可产生重要的调控作用,从而大大改善其催化活性和制氢选择性.Siliceous mesoporous SBA-15 has been proposed as a new effective structural promoter to prepare highly effective SiO2-modified Cu/ZnO/Al2O3 catalysts for hydrogen production. It was demonstrated that the SBA-15 modified catalyst exhibited superior performance in terms of methanol conversion and suppressed formation of CO during steam reforming of methanol. It was suggested that the intrinsic nature of SBA-15 should favor the generation of modified catalyst with much larger metallic copper surface area and improve copper dispersion. In addition, it was shown by in situ XRD that a considerable increase of the microstraln of Cu nanocrystals could be achieved in the catalysts modified by SBA-15, which correlates well with the enhanced CH3OH conversion as observed on the corresponding samples.

关 键 词：甲醇水蒸气重整 介孔SBA-15 Cu/ZnO/Al2O3催化剂 微观应变 原位XRD 

分 类 号：TQ116.2[化学工程—无机化工]