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首页> 外文期刊>RSC Advances >Optimization of process variables for supercritical liquefaction of giant fennel
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Optimization of process variables for supercritical liquefaction of giant fennel

机译：大茴香超临界液化工艺参数的优化

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摘要

Milled giant fennel (Ferula orientalis L.) stalks were treated in supercritical solvents in the presence of catalyst in a high pressure reactor. Effects of process variables including temperature (from 240 to 320 degrees C), solvent (2-propanol, 2-butanol, and acetone), catalyst (Na2CO3, NaOH, and ZnCl2), particle size (from 0.224 > D-p > 0.150 to 0.850 > D-p > 0.425), solvent/mass ratio (from 50/5 to 50/15) and reaction time (from 45 to 95 min) on product yields were investigated. The amounts of solid, liquid and gas produced, as well as the properties of the resulting bio-oils were determined. Temperature, catalyst and reaction time were major factors affecting the product yields and composition of bio-oils. The highest conversion (liquid + gas products) of 73.48% was achieved in acetone with 10% zinc chloride at 320 degrees C. Acetone as solvent, zinc chloride (10%) as catalyst, 0.224 > D-p > 0.150 as particle size, 50/5 as solvent/mass ratio, and 80 minutes as reaction time provide the optimum conditions for the supercritical liquefaction of Ferula orientalis L. The liquid products (bio-oils) obtained at 300 degrees C were analyzed by gas chromatography-mass spectrometry (GC-MS). The bio-oils which contained a higher amount of carbon and hydrogen than that of the original raw material had higher heating values ranging from 23.66 to 26.17 MJ kg(-1).
机译：在高压反应器中，在催化剂的存在下，在超临界溶剂中处理碾碎的巨型茴香（Ferula Orientalis L.）茎。工艺变量的影响，包括温度（240至320摄氏度），溶剂（2-丙醇，2-丁醇和丙酮），催化剂（Na2CO3，NaOH和ZnCl2），粒径（0.224> Dp> 0.150至0.850） > Dp> 0.425），溶剂/质量比（50/5至50/15）和反应时间（45至95分钟）对产物收率的影响进行了研究。测定了产生的固体，液体和气体的量，以及所得生物油的性质。温度，催化剂和反应时间是影响产物产率和生物油组成的主要因素。在丙酮中，在320℃下用10％氯化锌在丙酮中实现了最高转化率（液体+气体产物）为73.48％。丙酮为溶剂，氯化锌（10％）作为催化剂，粒度为0.224> Dp> 0.150，50 /溶剂/质量比为5，反应时间为80分钟，为东方Ferula L的超临界液化提供了最佳条件。用气相色谱-质谱（GC-MS）分析300摄氏度下获得的液体产物（生物油）。多发性硬化症）。与原始原料相比，碳和氢含量更高的生物油具有更高的发热量，范围从23.66到26.17 MJ kg（-1）。

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