Comparative study of the reaction characteristics and kinetics of catalytic hydrogenation involving propylene, 1-butene, and their mixture over Pt/ZrO2
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引用次数: 0
Abstract
In this study, the hydrogenation reaction of propylene, 1-butene, and their equimolar mixture was conducted over a Pt/ZrO2 catalyst with varying temperatures and initial gas compositions, in order to compare the reaction characteristics and kinetics of hydrogenation involving propylene and 1-butene. The results demonstrated that the conversion of propylene was generally higher than that of 1-butene, with the difference being less pronounced in a mixture feedstock. A kinetic model based on the Langmuir–Hinshelwood mechanism was developed for each feedstock. After optimization of the parameters included in the model while meeting the physicochemical constraints, the present model was successful in reproducing the measured data, with an error margin of less than 20%. Particularly, due to the similarity of reaction characteristics between propylene and 1-butene in a mixture feedstock, it was suggested that treating them as one olefin is a good option for simplifying the rate equation \({\text{F}}_{{{\text{C}}_{{\text{n}}} {\text{H}}_{{\text{2n,}}} {0}}}\) . \({\text{P}}_{{{\text{C}}_{{\text{n}}} {\text{H}}_{{2{\text{n}}}} }}\) . \({\text{x}}_{{{\text{C}}_{{\text{n}}} {\text{H}}_{{2{\text{n}}}} }}\) .
本研究在不同温度和初始气体组成的Pt/ZrO2催化剂上进行了丙烯、1-丁烯及其等摩尔混合物的加氢反应,比较了丙烯和1-丁烯加氢的反应特征和动力学。结果表明,丙烯的转化率一般高于1-丁烯的转化率,在混合原料中差异不明显。基于Langmuir-Hinshelwood机理建立了不同原料的动力学模型。在满足物理化学约束条件下对模型参数进行优化后,该模型成功地再现了实测数据,误差范围小于20%. Particularly, due to the similarity of reaction characteristics between propylene and 1-butene in a mixture feedstock, it was suggested that treating them as one olefin is a good option for simplifying the rate equation \({\text{F}}_{{{\text{C}}_{{\text{n}}} {\text{H}}_{{\text{2n,}}} {0}}}\) . \({\text{P}}_{{{\text{C}}_{{\text{n}}} {\text{H}}_{{2{\text{n}}}} }}\) . \({\text{x}}_{{{\text{C}}_{{\text{n}}} {\text{H}}_{{2{\text{n}}}} }}\) .
期刊介绍:
Reaction Kinetics, Mechanisms and Catalysis is a medium for original contributions in the following fields:
-kinetics of homogeneous reactions in gas, liquid and solid phase;
-Homogeneous catalysis;
-Heterogeneous catalysis;
-Adsorption in heterogeneous catalysis;
-Transport processes related to reaction kinetics and catalysis;
-Preparation and study of catalysts;
-Reactors and apparatus.
Reaction Kinetics, Mechanisms and Catalysis was formerly published under the title Reaction Kinetics and Catalysis Letters.