Glycerol conversion in the aqueous solution under hydrogen over Ru/C plus an ion-exchange resin and its reaction mechanism
Glycerol conversion in the aqueous solution under hydrogen over Ru/C plus an ion-exchange resin and its reaction mechanism
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DOI：
10.1016/j.jcat.2006.03.023
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发表时间：
2006-06-10
影响因子：
7.3
通讯作者：
Tomishige, Keiichi
中科院分区：
文献类型：
--
作者：
Miyazawa, Tomohisa;Kusunoki, Yohei;Tomishige, Keiichi
在各种贵金属（Ru/C、Rh/C、Pt/C和Pd/C）和酸催化剂[离子交换树脂（Amberlyst）、H2SO 4（aq）和HCl（aq）]中，Ru/C与Amberlyst的组合在脱水+氢化中是有效的（即，在温和的反应条件（393 K，8.0 MPa）下，甘油发生氢解反应。甘油脱水制丙酮醇是在酸催化剂的催化下进行的。随后丙酮醇在金属催化剂上氢化得到1，2-丙二醇。金属催化剂+ Amberlyst催化甘油氢解反应的活性与金属催化剂上丙酮醇加氢反应的活性有关。在酸性催化剂中，H2SO 4（aq）的甘油脱水活性低于Amberlyst，HCl（aq）的催化活性显著降低Ru/C催化剂的丙酮醇加氢活性。此外，Ru/C上的OH基团还可以催化甘油脱水为3-羟基丙醛，然后通过随后的氢化和其他降解产物将其转化为1，3-丙二醇。(c)2006年爱思唯尔公司All rights reserved.
Of the various noble metals (Ru/C, Rh/C, Pt/C, and Pd/C) and acid catalysts [an ion-exchange resin (Amberlyst), H2SO4(aq), and HCl(aq)], the combination of Ru/C with Amberlyst is effective in the dehydration + hydrogenation (i.e., hydrogenolysis) of glycerol under mild reaction conditions (393 K, 8.0 MPa). The dehydration of glycerol to acetol is catalyzed by the acid catalysts. The subsequent hydrogenation of acetol on the metal catalysts gives 1,2-propanediol. The activity of the metal catalyst + Amberlyst in glycerol hydrogenolysis can be related to that of acetol hydrogenation over the metal catalysts. Regarding acid catalysts, H2SO4(aq) shows lower glycerol dehydration activity than Amberlyst, and HCl(aq) strongly decreases the activity of acetol hydrogenation on Ru/C. In addition, the OH group on Ru/C can also catalyze the dehydration of glycerol to 3-hydroxypropionaidehyde, which can then be converted to 1,3-propanediol through subsequent hydrogenation and other degradation products. (c) 2006 Elsevier Inc. All rights reserved.