双金属催化剂在丙烯环氧化中的应用研究
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摘要
制备和考察了一系列银催化剂、金催化剂和银-金双金属催化剂,通过系列结构表征及其在丙烯直接环氧化制环氧丙烷反应中的性能评价研究,发现单金属银催化剂对目标产物的选择性较低,而双金属催化剂能够显著提高反应选择性,在丙烯直接环氧化反应中表现出良好的应用潜力。
In this study, a series of silver catalysts, gold catalysts and Ag-Au bimetallic catalysts were prepared. The structure characteristics were investigated by series of characterizations and their catalytic performances were evaluated by the direct epoxidation of propylene to produce propylene oxide. It was found that the selectivity of monometallic silver catalyst to the target product was very low, while the bimetallic catalyst could significantly improve the selectivity of the reaction and showed good application potential in the direct epoxidation of propylene.
In this study, a series of silver catalysts, gold catalysts and Ag-Au bimetallic catalysts were prepared. The structure characteristics were investigated by series of characterizations and their catalytic performances were evaluated by the direct epoxidation of propylene to produce propylene oxide. It was found that the selectivity of monometallic silver catalyst to the target product was very low, while the bimetallic catalyst could significantly improve the selectivity of the reaction and showed good application potential in the direct epoxidation of propylene.
引文
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[7]金国杰,郭杨龙,刘晓晖,等.用原位红外技术研究Ag-MoO3/ZrO2催化丙烯气相环氧化反应[J].化学学报,2006,19:1941-1946.
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[9]李灿,罗孟飞,鲁继青.用于空气直接氧化丙烯制环氧丙烷反应的Ag-CuCl催化剂[P],中国:CN01136129.8,2011.
[10]Takahashi A,Hamakawa N,Nakamura I,et al.Effects of added 3Dtransition-metals on Ag-based catalysts for direct epoxidation of propylene by oxygen[J].Applied Catalysis A,2005,294(1):34-39.
[11]Kumagai M,Messing G L.Controlled Transforma-tion and Sintering of a Boehmite Sol-Gel by Alumina Seeding[J].J Am Ceram Soc.,1985,68:500-505.
[2]蔡杰,吴莉娜.国内外环氧丙烷生产技术及市场分析[J].中国氯碱,2009,05:1-6.
[3]陈超美.环氧丙烷合成工艺技术进展[J].石油化工,2002,31:300-304.
[4]郭杨龙,姚炜,刘晓晖,等.丙烯环氧化合成环氧丙烷技术的研究进展[J].石油化工,2008,37(2):111-118.
[5]薛祖源.环氧丙烷生产工艺述评及发展设想[J].化工设计,2009,19(5):3-10.
[6]Torres D,Lopez N,Illas F,et al.Low-basicity oxygen atoms:A key in the search for propylene epoxidation catalysts[J].Angew Chem,2007,119:2101-2104.
[7]金国杰,郭杨龙,刘晓晖,等.用原位红外技术研究Ag-MoO3/ZrO2催化丙烯气相环氧化反应[J].化学学报,2006,19:1941-1946.
[8]Lu J,Bravo-Suárez JJ,Haruta M,et al.Direct propylene epoxidation over modified Ag/CaCO3 catalysts[J].Applied Catalysis A,2006,302:283-295.
[9]李灿,罗孟飞,鲁继青.用于空气直接氧化丙烯制环氧丙烷反应的Ag-CuCl催化剂[P],中国:CN01136129.8,2011.
[10]Takahashi A,Hamakawa N,Nakamura I,et al.Effects of added 3Dtransition-metals on Ag-based catalysts for direct epoxidation of propylene by oxygen[J].Applied Catalysis A,2005,294(1):34-39.
[11]Kumagai M,Messing G L.Controlled Transforma-tion and Sintering of a Boehmite Sol-Gel by Alumina Seeding[J].J Am Ceram Soc.,1985,68:500-505.