负载型金-银双金属催化剂低温催化尾氯脱氢性能
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摘要
以Al_2O_3作为载体,采用阴离子浸渍法和等体积浸渍法制备负载型金-银双金属催化剂,并使用固定床反应器考察在低温条件下,不同的焙烧温度、还原温度等对催化剂尾氯催化脱氢性能的影响。结果表明,Au-Ag双金属催化剂的最佳制备条件为:Au负载量为0.4%,Ag负载量为0.7%,制备的Au-Ag/Al_2O_3催化剂在反应温度为100℃时,脱氢的氢气转化率达94.58%,氢氧反应选择性达59.28%.
Supported catalysts Au-Ag/Al_2O_3 were made by anion impregnation method and incipient-wetness impregnation method.The catalytic dehydrogenate performance of the catalysts in tail chlorine was measured by a fixed bed reactor at low temperature.The experiment exploited the influence of calcination temperature,reduction temperature and reaction temperature on the performance of catalytic dehydrogenation of tail chlorine.The results show that the hydrogen conversion was 94.58% and selectivity of hydrogen-oxygen reaction was 59.28% when the reaction temperature was 100 ℃ and the Au-Ag loading was 0.4%~0.7%.
Supported catalysts Au-Ag/Al_2O_3 were made by anion impregnation method and incipient-wetness impregnation method.The catalytic dehydrogenate performance of the catalysts in tail chlorine was measured by a fixed bed reactor at low temperature.The experiment exploited the influence of calcination temperature,reduction temperature and reaction temperature on the performance of catalytic dehydrogenation of tail chlorine.The results show that the hydrogen conversion was 94.58% and selectivity of hydrogen-oxygen reaction was 59.28% when the reaction temperature was 100 ℃ and the Au-Ag loading was 0.4%~0.7%.
引文
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[2]PIETERS W J M,WENGER F.Removal of low concentrations of hydrogen from chlorine gas:US4224293[P].1980-09-23.
[3]周华,董守安.纳米金负载型催化剂的研究进展[J].贵金属,2004,25(2):49-55.ZHOU H,DONG S A.Advances in the research of supported gold particle catalysts[J].Precious Metals,2004,25(2):49-55.
[4]BOND G C,THOMPSON D T.Catalysis by gold[J].Catalysis Reviews:Science and Engineering,1999,41(3/4):319-388.
[5]HARUTA A.When gold is not noble:catalysis by nanoparticles[J].Chemical Record,2003,3(2):75-87.
[6]HARUTA M.Catalysis of gold nanoparticles deposited on metal oxides[J].CATTECH,2002,33(43):102-115.
[7]THOMPSON D T.Highlights of the symposium on gold/silver catalysis[J].Gold Bulletin,2001,34(4):134-140.
[8]索掌怀,翁永根,金明善,等.金溶液pH值及浸泡处理对Au/Al2O3催化剂上CO氧化反应活性的影响[J].催化学报,2005,26(11):1022-1026.SUO Z H,WENG Y G,JIN M S,et al.Influence of gold solution pH value and steeping treatment on CO oxidation reactivity over Au/Al2O3catalyst[J].Chinese Journal of Catalysis,2005,26(11):1022-1026.
[9]高典楠,王胜,刘莹,等.焙烧温度对Pd/Al2O3催化剂上甲烷燃烧反应性能的影响[J].催化学报,2010,31(11):1363-1368.GAO D N,WANG S,LIU Y,et al.Methane combustion over Pd/Al2O3catalyst:effect of calcination temperature[J].Chinese Journal of Catalysis,2010,31(11):1363-1368.
[10]詹亮,张睿,王艳莉,等.Pd在超级活性炭上的负载对其储氢性能的影响[J].新型炭材料,2005,20(1):33-38.ZHAN L,ZHANG R,WANG Y L,et al.Properties of super-activated carbon coated with palladium for hydrogen storage[J].New Carbon Materials,2005,20(1):33-38.
[11]许立信,王豹,李培杰,等.Au/γ-Al2O3催化氧化葡萄糖制备葡萄糖酸钠的研究[J].食品工业科技,2012,33(16):289-295.XU L X,WANG B,LI P J,et al.Catalytic oxidation of glucose to sodium gluconate by Au/γ-Al2O3catalysts[J].Science and Technology of Food Industry,2012,33(16):289-295.
[12]张学清,项金钟,胡永茂,等.纳米Al2O3的制备及红外吸收研究[J].中国陶瓷,2004,40(1):26-29.ZHANG X Q,XIANG J Z,HU Y M,et al.Study on preparation and IR absorbency of nanoscale Al2O3[J].China Ceramics,2004,40(1):26-29.
[13]王志明,王昊.Al2O3-SiO2溶胶的红外吸收光谱分析[J].玻璃纤维,2000(1):6-8.WANG Z M,WANG H.Analysis of infrared absorption spectra of Al2O3-SiO2sol[J].Fiber Glass,2000(1):6-8.