The Role of Some Competitive Adsorbents in the Preparation of Pt/Al_2O_3 Catalysts with Controlled Pt Distribution by Impregnation

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The Role of Some Competitive Adsorbents in the Preparation of Pt/Al_2O_3 Catalysts with Controlled Pt Distribution by Impregnation

Wang Jianguo, Zhang Jiayu and Pang Li Department of Chemistry, Beijing University

Online:1982-06-25 Published:1982-06-25

浸渍法制备Pt/Al_2O_3催化剂的研究——竞争吸附剂对Pt分布的影响

王建国,张嘉郁,庞礼

北京大学化学系 ,北京大学化学系 ,北京大学化学系

Abstract

Abstract: The results of adsorption equilibrium measurements show that the saturation adsorbed amounts(x/m)M of some organic acids increase in the following order:Acetic

摘要： 水溶液中有机酸在η-Al_2O_3上的饱和吸附量（x/m）_M依下列顺序增大:乙酸<一氯乙酸<乳酸<酒石酸<柠檬酸。用H_2PtCl_6溶液浸渍η-Al_2O_3时,若以上述有机酸为竞争吸附剂,则（x/m）_M越大者将使H_2PtCl_6平衡吸附量下降越多。浸渍动力学的研究表明,在竞争吸附剂存在时,H_2PtCl_6在η-Al_2O_3载体上的吸附量取决于吸附平衡。柠檬酸、酒石酸可使H_2PtCl_6平衡吸附量大为下降,这是它们使Pt可能形成蛋白型分布的原因。另外三种酸使H_2PtCl_6平衡吸附量下降不大,因而不能使Pt呈蛋白型分布。

Wang Jianguo, Zhang Jiayu and Pang Li Department of Chemistry, Beijing University. The Role of Some Competitive Adsorbents in the Preparation of Pt/Al_2O_3 Catalysts with Controlled Pt Distribution by Impregnation[J]. .

王建国,张嘉郁,庞礼. 浸渍法制备Pt/Al_2O_3催化剂的研究——竞争吸附剂对Pt分布的影响 [J]. CIESC Journal.