Selective Hydrogenation of Acetylene over SBA‐15 Supported Au—Cu Bimetallic Catalysts
作者： Jonathan William Lee , Xiaoyan Liu , Chung‐Yuan Mou , None
关键词:
摘要: Copper has been reported to be active in selective hydrogenation of acetylene but very oligomers instead ethylene. In this work, SBA-15 supported Cu-Au bimetallic nanoparticles are studied under different Cu/Au ratios and temperature. The addition gold promotes the catalytic performance, reducing amount formed on catalyst's surface. A synergistic effect between copper is also displayed. catalyst with ratio at 1/3 both better conversion selectivity 160-200 degrees C, providing opportunities lower operating temperature (>200 C) copper. synergy can ascribed compromise two factors: electronic sintering resistance nanoparticles. Gold makes more electron-deficient, therefore, enhances conversion. Besides, particles remain highly dispersed small (ca. 3 nm) when large reduces ensemble size surface, minimizing C-C coupling reactions.
irgrid.ac.cn参考文章(45)
G. C. Bond, P. A. Sermon, Gold catalysts for olefin hydrogenation Gold Bulletin. ,vol. 6, pp. 102- 105 ,(1973) , 10.1007/BF03215018
Edgar L. Mohundro, Overview on C2 and C3 Selective Hydrogenation in Ethylene Plants ,(2003)
J ANDERSON, C MARQUEZALVAREZ, M LOPEZMUNOZ, I RODRIGUEZRAMOS, A GUERRERORUIZ, Reduction of NOx in C3H6/air mixtures over Cu/Al2O3 catalysts Applied Catalysis B-environmental. ,vol. 14, pp. 189- 202 ,(1997) , 10.1016/S0926-3373(97)00022-2
A. Dandekar, M.A. Vannice, Determination of the Dispersion and Surface Oxidation States of Supported Cu Catalysts Journal of Catalysis. ,vol. 178, pp. 621- 639 ,(1998) , 10.1006/JCAT.1998.2190
K CHOI, CO oxidation over Pd and Cu catalysts. IV, Prereduced Al2O3-supported copper Journal of Catalysis. ,vol. 131, pp. 22- 35 ,(1991) , 10.1016/0021-9517(91)90320-4
Jenna Pike, Siu-Wai Chan, Feng Zhang, Xianqin Wang, Jonathan Hanson, Formation of stable Cu2O from reduction of CuO nanoparticles Applied Catalysis A-general. ,vol. 303, pp. 273- 277 ,(2006) , 10.1016/J.APCATA.2006.02.008
S.A. Nikolaev, V.V. Smirnov, Synergistic and size effects in selective hydrogenation of alkynes on gold nanocomposites Catalysis Today. ,vol. 147, ,(2009) , 10.1016/J.CATTOD.2009.07.032
Andrzej Borodziński, Geoffrey C. Bond, Selective Hydrogenation of Ethyne in Ethene‐Rich Streams on Palladium Catalysts. Part 1. Effect of Changes to the Catalyst During Reaction Catalysis Reviews. ,vol. 48, pp. 91- 144 ,(2006) , 10.1080/01614940500364909
Yolanda Segura, Núria López, Javier Pérez-Ramírez, Origin of the superior hydrogenation selectivity of gold nanoparticles in alkyne + alkene mixtures: Triple- versus double-bond activation Journal of Catalysis. ,vol. 247, pp. 383- 386 ,(2007) , 10.1016/J.JCAT.2007.02.019
Xiaoyan Liu, Aiqin Wang, Lin Li, Tao Zhang, Chung-Yuan Mou, Jyh-Fu Lee, Structural changes of Au-Cu bimetallic catalysts in CO oxidation: In situ XRD, EPR, XANES, and FT-IR characterizations Journal of Catalysis. ,vol. 278, pp. 288- 296 ,(2011) , 10.1016/J.JCAT.2010.12.016