CAJ | 학술논문

采用水热合成法，以十六烷基三甲基溴化铵(CTAB)为模板剂，硅酸钠为硅源，硝酸铜、硫酸锌、硝酸铝为金属源，合成了不同铜含量的Cu-Zn-Al-MCM-41介孔分子筛。利用XRD、TEM、FT-IR、UV-vis和BET技术手段对合成样品进行表征，并考察其对CO加氢反应的催化性能。结果表明，合成的Cu-Zn-Al-MCM-41介孔分子筛具有典型的六方介孔结构，孔径均一，平均直径在2.5 nm左右，且金属离子进入分子筛骨架结构中。随着铜含量的增加，孔径增大而比表面积降低。该催化剂具有加氢脱水双功能催化作用，在异丙醇存在下，对CO加氢反应生成仲丁醇具有良好的催化性能。随着铜含量的增加，CO转化率增大；当合成催化剂的nSi：nCu：nZn：nAl为40：4：1：1，反应温度为493 K下反应4 h后，CO转化率可达到89%。
채용수열합성법，이십륙완기삼갑기추화안(CTAB)위모판제，규산납위규원，초산동、류산자、초산려위금속원，합성료불동동함량적Cu-Zn-Al-MCM-41개공분자사。이용XRD、TEM、FT-IR、UV-vis화BET기술수단대합성양품진행표정，병고찰기대CO가경반응적최화성능。결과표명，합성적Cu-Zn-Al-MCM-41개공분자사구유전형적륙방개공결구，공경균일，평균직경재2.5 nm좌우，차금속리자진입분자사골가결구중。수착동함량적증가，공경증대이비표면적강저。해최화제구유가경탈수쌍공능최화작용，재이병순존재하，대CO가경반응생성중정순구유량호적최화성능。수착동함량적증가，CO전화솔증대；당합성최화제적nSi：nCu：nZn：nAl위40：4：1：1，반응온도위493 K하반응4 h후，CO전화솔가체도89%。
The catalysts of different copper content Cu-Zn-Al-MCM-41 mesoporous molecular sieves were synthesized by hydrothermal method with cetyltrimethylammonium bromide (CTAB) as template, sodium silicate as silicon source and copper nitrate, zinc sulfate, aluminium nitrate as metal source. The catalysts were characterized by XRD, TEM, FT-IR, UV-vis and BET, respectively, and their catalytic abilities were investigated by CO hydrogenation. The results show that the Cu-Zn-Al-MCM-41 mesoporous molecular sieves have uniform hexagonal mesoporous structure and uniform pore distribution with average pore diameter of about 2.5 nm. The metal ions are incorporated into the framework of MCM-41. With the increase of copper content the pore diameter of MCM-41 is increased while the surface area is decreased. The catalysts have hydrogenation and dehydration bifunctional catalytic ability. The hydrogenation of CO over the catalysts can yield 2-butanol with 2-propanol as the solvent and during the hydrogenation the catalytic activity of the catalyst is good. The conversion of CO is increased with increasing copper content of the catalyst. The conversion of CO is 89%under the condition of using the catalyst with nSi:nCu:nZn:nAl=40:4:1:1, reaction temperature=493 K and reaction time=4 h.