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首页> 外文期刊>RSC Advances >One step synthesis of ethyl levulinate biofuel by ethanolysis of renewable furfuryl alcohol over hierarchical zeolite catalyst
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One step synthesis of ethyl levulinate biofuel by ethanolysis of renewable furfuryl alcohol over hierarchical zeolite catalyst

机译：分级沸石催化剂上可再生糠醇的乙醇化一步合成乙酰丙酸乙酯生物燃料

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摘要

Ethanolysis of renewable furfuryl alcohol (FAL) to ethyl levulinate (EL) biofuel over various zeolites viz. H-ZSM-5 (microporous, medium pore), Hierarchical-HZ-5 (combination of micro-and meso pore), H-Beta (microporous, large pore) and Ultra Stable Y (USY, microporous, large pore) was studied in detail. To the best of our knowledge, probably for the first time, Hierarchical-HZ-5 synthesized by desilication post-treatment has been employed as a heterogeneous catalyst for ethanolysis of FAL. The synthesized catalysts were characterized by powder X-ray diffraction (PXRD), temperature programmed NH3 desorption (TPAD), Energy dispersive X-ray analysis (EDAX), etc. Response surface methodology (RSM) with Box-Behnken experimental design (BBD) was used to investigate the influence of three crucial process variables of ethanolysis such as ethanol to FAL molar ratio, percent catalyst loading and reaction temperature on EL yield. The optimization tool of design expert software was employed to obtain the optimum reaction parameters for FAL ethanolysis over Hierarchical-HZ-5 catalyst. Three intermediates of FAL ethanolysis reaction such as, ethoxymethylfuran (EMF), 4,5,5-triethoxypentan-2-one and diethyl ether (DEE) have been identified and quantified from the product mixture with the aid of Gas Chromatography-Mass Spectroscopy (GC-MS). Hierarchical-HZ-5 was found to be a potential catalyst for ethanolysis of FAL with 73% EL yield and 26% EMF yield at optimized process parameters.
机译：在各种沸石上将可再生糠醇（FAL）乙醇化为乙酰丙酸乙酯（EL）生物燃料。研究了H-ZSM-5（微孔，中孔），Herarchical-HZ-5（微孔和中孔的组合），H-Beta（微孔，大孔）和超稳定Y（USY，微孔，大孔）详细。据我们所知，可能是第一次，通过脱硅后处理合成的Hierarchical-HZ-5被用作FAL乙醇化反应的非均相催化剂。通过粉末X射线衍射（PXRD），程序升温的NH3解吸（TPAD），能量色散X射线分析（EDAX）等对合成的催化剂进行了表征。采用Box-Behnken实验设计（BBD）的响应面方法（RSM）用于研究乙醇化的三个关键过程变量，例如乙醇与FAL的摩尔比，催化剂负载百分比和反应温度对EL收率的影响。采用设计专家软件的优化工具，获得了Herarchical-HZ-5催化剂上FAL乙醇化反应的最佳反应参数。 FAL乙醇化反应的三种中间体，如乙氧基甲基呋喃（EMF），4,5,5-三乙氧基戊烷-2-一和二乙醚（DEE）已通过气相色谱-质谱法从产物混合物中鉴定和定量（ GC-MS）。在优化的工艺参数下，发现Herarchical-HZ-5是FAL乙醇化的潜在催化剂，EL收率73％，EMF收率26％。

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