A solid acid catalyst has been prepared by grafting Boron trifluoride on mesoporous molecular sieve MCM 41 and characterized by XRD and FTIR techniques. The XRD and FTIR results indicated that the BF 3·Et 2O inte...A solid acid catalyst has been prepared by grafting Boron trifluoride on mesoporous molecular sieve MCM 41 and characterized by XRD and FTIR techniques. The XRD and FTIR results indicated that the BF 3·Et 2O interlocks with the silicon groups of MCM 41 surface to form strong solid acid. The solid acid catalyst would effectively promote the opening of epichlorohydrin with isobutanol to form 1 isobutoxy 3 chloropropanol, and showed a nice activity and selectivity.展开更多
用浸渍法制备了 Ni/ Si O2 和 Ni/ Ca O- Si O2 催化剂 ,研究了流化床反应器中用 Ca O改性微球硅胶载体对催化性能的影响 ,考察了 Ni/ Ca O- Si O2 催化剂上甲烷部分氧化与甲烷二氧化碳重整耦合制合成气反应中 Ca负载量、反应温度、空...用浸渍法制备了 Ni/ Si O2 和 Ni/ Ca O- Si O2 催化剂 ,研究了流化床反应器中用 Ca O改性微球硅胶载体对催化性能的影响 ,考察了 Ni/ Ca O- Si O2 催化剂上甲烷部分氧化与甲烷二氧化碳重整耦合制合成气反应中 Ca负载量、反应温度、空速和原料气中的 O2 / CO2 比对活性与选择性以及产物 H2 / CO比的影响 ,并用 XRD、TEM、H2 - TPR和 CO2 - TPD等测试手段对催化剂进行了表征。结果表明 ,经过氧化钙改性的微球硅胶能够将“自由态”的镍物种转变为“束缚态”,使镍物种达到高度分散状态。引入 10(wt) % Ca助剂所制备的催化剂具有很好的活性和稳定性 。展开更多
文摘A solid acid catalyst has been prepared by grafting Boron trifluoride on mesoporous molecular sieve MCM 41 and characterized by XRD and FTIR techniques. The XRD and FTIR results indicated that the BF 3·Et 2O interlocks with the silicon groups of MCM 41 surface to form strong solid acid. The solid acid catalyst would effectively promote the opening of epichlorohydrin with isobutanol to form 1 isobutoxy 3 chloropropanol, and showed a nice activity and selectivity.
