Hydrogenation Reaction in CO2-Expanded Liquid on Metal-loading Mesoporous Catalysts

潘世惟(Phan The Duy)

指導教授 ： 談駿嵩

國立清華大學/工學院/化學工程學系/碩士(2010年)

https://doi.org/10.6843/NTHU.2010.00651

摘要

Catalytic hydrogenation is commcercially used to reduce the aromatics content from petroleum derivatives such as medium distillates, kerosene and paraffinic solvents. Due to the stringent environmental regulations, supported group VIII metals based catalysts are required to reach high rates of reaction at mild operating conditions. These catalysts are more active than the conventional hydrotreating one, although they are highly sensitive to the sulfur compounds present in the industrial feed-stocks. For these reasons, the liquid-phase hydrogenation of p-xylene (arenes) was studied over Ru and Rh dispersed on mesoporous support (MCM-41, SBA-15,…). The main goal of this work is to compare the behavior of silica supported Ru and Rh catalysts in the p-xylene hydrogenation and examine the effects of CO2-expanded liquid on the reaction performance. It is commonlly thought that rate-enhancement in catalytic hydrogenation involving CO2-expanded media is associated with an increase in the solubility of H2 in the liquid phase. Another explanation that has been proposed for the rate enhancement is that CO2 modifies the reactivity of the substrate via intermolecular interactions with its functional groups. There is also the possibility that CO2 influences the catalytic activity of small supported metal particles.

關鍵字

氫化 ； 化學流體沉積法 ； 二氧化碳膨脹溶液 ； 中孔洞奈米金屬觸媒

參考文獻

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