Hydrodeoxygenation and pyrolysis of free fatty acids obtained from waste rendering fat
Hydrodeoxygenation and pyrolysis of free fatty acids obtained from waste rendering fat
复制标题
从废弃提炼脂肪中获得的游离脂肪酸的加氢脱氧和热解
DOI：
10.26850/1678-4618eqj.v45.3.2020.p28-36
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
J. M. Hidalgo Herrador
中科院分区：
文献类型：
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作者：
M. Murat;J. Lederer;A. Rodová;J. M. Hidalgo Herrador
非食用脂肪是用于生物燃料生产的常见可再生原料，以部分避免使用可食用饲料和化石燃料。这项工作的目的是利用废物提炼脂肪生产热解油和氢化油。原料水解产生游离脂肪酸和甘油+残余物。将游离脂肪酸分别热解（有和没有金属硫化物金属负载的催化剂）或加氢处理。使用在氮气（热解）或氢气（加氢处理）气氛中密封的高压釜。通过GC-FID/TCD分析气态产物。通过模拟蒸馏（ASTM D2887）和FT-IR（衰减全反射技术）分析液体产物。对于热解，主要的气态产物是二氧化碳、甲烷、乙烷和丙烷。对于加氢处理，产生的气体总量低得多，是主要产物二氧化碳。对于液体，游离脂肪酸的加氢处理通过脱羧反应产生相应的烃，并且热解产生与原始游离脂肪酸相比具有较低沸程的化合物的混合物。在热解中使用金属硫化物金属负载型催化剂导致更高量的氢气产生。但与非催化试验相比具有相似的沸程液体产物。
Non-edible fats are a common renewable feedstock for the biofuels production to avoid partially the use of edible feeds and fossil fuels. The aim of this work was the use of waste rendering fat to produce pyrolyzed and hydrogenated oils. The feedstock was hydrolyzed producing free fatty acids and glycerol + residues. The free fatty acids were pyrolyzed (with and without metal sulfides metal supported catalyst) or hydrotreated separately. An autoclave closed hermetically in nitrogen (pyrolysis) or hydrogen (hydrotreatment) atmosphere was used. Gaseous products were analyzed by GC‑FID/TCD. Liquid products were analyzed by Simulated Distillation (ASTM D2887) and FT-IR (attenuated total reflectance technique). For the pyrolysis, the main gaseous products were carbon dioxide, methane, ethane, and propane. For the hydrotreatment, the total amount of gases produced was much lower being the main product the carbon dioxide. For liquids, the hydrotreatment of the free fatty acids produced the respective hydrocarbons by decarboxylation reaction and the pyrolysis produced a mixture of compounds with lighter boiling ranges compared to the original free fatty acids. The use of a metal sulfide metal supported catalyst in the pyrolysis led to a higher amount of hydrogen production. but similar boiling range liquid products compared to the non-catalytic test.