Advanced biofuels from waste cooking oil via solventless and hydrogen-free catalytic deoxygenation over mesostructured Ni-Co/SBA-15, Ni-Fe/SBA-15, and Co-Fe/SBA-15 catalysts
Advanced biofuels from waste cooking oil via solventless and hydrogen-free catalytic deoxygenation over mesostructured Ni-Co/SBA-15, Ni-Fe/SBA-15, and Co-Fe/SBA-15 catalysts
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DOI：
10.1016/j.fuel.2021.122695
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发表时间：
2021-11
期刊：
影响因子：
7.4
通讯作者：
Norshakirah Ahmad Rashidi;Elnida Mustapha;Yeow Yean Theng;N. A. Razak;Najihah Abdul Bar;Khairul Basyar Baharudin;D. Derawi
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文献类型：
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作者：
Norshakirah Ahmad Rashidi;Elnida Mustapha;Yeow Yean Theng;N. A. Razak;Najihah Abdul Bar;Khairul Basyar Baharudin;D. Derawi
废食用油因其成本低且储量丰富而成为先进生物燃料生产中极具吸引力的原料之一。本研究合成了一系列介孔双金属催化剂Ni-Co/SBA-15、Ni-Fe/SBA-15和Co-Fe/SBA-15，并通过脱羧和脱羰基反应途径组成的无氢和无溶剂催化脱氧过程分析了它们的催化活性。在这个过程中，WCO的氧化三酰甘油（TAGs）被转化为含有类似汽油和柴油的碳氢化合物的先进生物燃料。首先，在六方介孔催化剂载体SBA-15上，采用Ni-Co、Ni-Fe和Co-Fe （5 wt%、10 wt%和15 wt%）金属种类湿浸渍法制备了双金属催化剂。氮等温物理吸附分析表明，所制备的催化剂均为介观结构，孔径范围在4.8 ~ 5.5 nm之间。x射线衍射图证实，湿浸渍双金属颗粒不会破坏催化剂载体SBA-15的六边形结构。催化活性和脱氧过程表明，10% Ni-Fe/SBA-15对柴油馏分（C11-C17）的选择性较低，但对液体的收率最高（73.1%）；5% Ni-Co/SBA-15对柴油馏分（C11-C17）的选择性最高，为81%。
Waste cooking oil (WCO) is one of the attractive feedstocks in the production of advanced biofuels due to its low cost and was usually left behind abundantly. In this study, a series of mesoporous bimetallic catalysts, Ni-Co/SBA-15, Ni-Fe/SBA-15, and Co-Fe/SBA-15 were synthesized and analyzed their catalytic activity through a hydrogen-free and solventless catalytic deoxygenation process that consists of decarboxylation and decarbonylation reaction pathways. In this process, the oxygenated triacylglycerols (TAGs) of WCO were converted to advanced biofuels that contain gasoline and diesel-like hydrocarbons. Firstly, the bimetallic catalysts were prepared using the wet impregnation process of Ni-Co, Ni-Fe, and Co-Fe (5 wt%, 10 wt%, and 15 wt%) metal species on the hexagonal mesoporous catalyst supporter, SBA-15. Nitrogen-isotherm physisorption analysis proved that all the prepared catalysts are mesostructured with a 4.8–5.5 nm pore diameter range. X-ray diffractogram confirmed that the wet impregnation of bimetallic particles does not disrupt the hexagonal structure of catalyst support, SBA-15. The catalytic activity, deoxygenation process show that 10% Ni-Fe/SBA-15 possess the highest yield of liquid (73.1%) but have a low selectivity towards the diesel fraction, while the 5% Ni-Co/SBA-15 posed the highest selectivity of diesel fraction (C11-C17) of 81%.