【摘 要】
：
Dimethyl carbonate (DMC) is an attractive chemical with versatile applications, which is required an increasing production capacity.Copper (Ⅰ and Ⅱ) chlorides are known as effective catalysts to produ
【机 构】
：
Key Laboratory for Green Chemical Process of Ministry of Education, Wuhan Institute of Technology, H
【出 处】
：
The 6th Joint China-Japan Chemical Engineering Symposium(第六届
论文部分内容阅读
Dimethyl carbonate (DMC) is an attractive chemical with versatile applications, which is required an increasing production capacity.Copper (Ⅰ and Ⅱ) chlorides are known as effective catalysts to produce DMC by oxidative carbonylation of methanol.In this catalytic systems, the loss of Cl-may result in catalyst deactivation.Therefore, it is necessary to choose high-performance support and promotor for the preparation of catalyst.Micro-porous manganese oxide octahedral molecular sieve (OMS) has been one of new catalytic materials that possessed pore dimensions close to molecular size.Due to its characters such as mild surface acidity-basicity, perfect ion-exchange ability and chemically made of mixed valence state manganese (Mn2+,Mn3+ and Mn4+), OMS has been widely applied in catalyst field.In this article, manganese oxide octahedral molecular sieve materials (OMS-2) with different metal cation dopants (M: Ag+、 Ce3+、 Sr2+、 Pb2+、 Zn2+、 La+) were prepared by a wet impregnation process and characterized through XRD, SEM, H2-TPR and.CO2-TPD.It was found that the dopants by different metal cation could change inherent topography of OMS-2 resembled Mn2O3 in patterns.And this change was perhaps the reason that improved the catalytic activity.For example, Ag/Cu-OMS-2 catalyst showed better catalytic activity with 89.7% yield of DMC.
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