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首页> 外文期刊>Catalysis science & technology >Alkali-and nitrate-free synthesis of highly active Mg-Al hydrotalcite-coated alumina for FAME production
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Alkali-and nitrate-free synthesis of highly active Mg-Al hydrotalcite-coated alumina for FAME production

机译:高度活性的Mg-Al Hydrotalcite涂层氧化铝的碱性和无硝酸盐合成用于名望

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摘要

Mg-At hydrotalcite coatings have been grown on alumina via a novel alkali-and nitrate-free impregnation route and subsequent calcination and hydrothermal treatment. The resulting Mg-HT/Al2O3 catalysts significantly outperform conventional bulk hydrotalcites prepared via co-precipitation in the trans-esterification of C4-C_(18) triglycerides for fatty acid methyl ester (FAME) production, with rate enhancements increasing with alkyl chain length. This promotion is attributed to improved accessibility of bulky triglycerides to active surface base sites over the higher area alumina support compared to conventional hydrotalcites wherein many active sites are confined within the micropores.
机译:MG-AT水力充足的涂层已通过新型碱和无硝酸盐的浸渍途径以及随后的钙化和热液处理在氧化铝上生长。 所得的MG-HT/AL2O3催化剂显着超过了通过共同沉淀在C4-C_(18)甘油三酸酯的跨酯化中制备的常规大量水力钙化,用于脂肪酸甲基酯(FAME)的产生,速率增强的速率随烷基链长而增加。 该促销归因于与传统的水力负体相比,较高面积氧化铝载体的活性表面基地的可及性提高了,其中许多活性位点限制在微孔内。

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