The modified supercritical media for one-pot biodiesel production from Chlorella vulgaris using photochemically-synthetized SrTiO3 nanocatalyst
The modified supercritical media for one-pot biodiesel production from Chlorella vulgaris using photochemically-synthetized SrTiO3 nanocatalyst
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DOI：
10.1016/j.renene.2020.06.081
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发表时间：
2020-11-01
期刊：
影响因子：
8.7
通讯作者：
Hamadanian, Masood
中科院分区：
文献类型：
--
作者：
Aghilinategh, Maryam;Barati, Mohammad;Hamadanian, Masood
在这项研究中，一锅法生产生物柴油，烃，含氧化合物，和芳香族化合物的小球藻进行在超临界甲醇无催化剂和存在下的TiO 2和SrTiO 3纳米催化剂。在SrTiO 3的存在下的反应表现出最高的脂肪酸甲酯（FAME）的生产收率。研究了水、氯仿、乙醚、正己烷等助溶剂对SrTiO 3催化反应的影响。光化学制备的SrTiO 3纳米催化剂和催化剂的浸出到产品进行了评价。结果表明，对于除含氧化合物外的所有产物，向甲醇中加入乙醚和氯仿对产物产率有轻微的正影响。对于所有产物，正己烷共溶剂显示出最佳性能，对于FAME、含氧化合物、烃和芳族化合物，产率分别为16.65、2.42、2.12和0.57 mg.g（生物质）（-1）。此外，除了含氧化合物的情况外，水对产率没有显着影响。结果可能是由于正己烷在反应条件下溶解生物质的高能力。此外，ICP-OES在最终产品中未检测到痕量催化剂，并证实用于催化剂制备的光化学方法可防止催化剂浸出。(C)2020爱思唯尔有限公司保留所有权利。
In this research, a one-pot production of biodiesel, hydrocarbons, oxygenates, and aromatics form Chlorella vulgaris was performed in supercritical methanol without catalyst and in the presence of TiO2 and SrTiO3 nanocatalysts. The reaction in the presence of SrTiO3 showed the highest production yield of fatty acid methyl esters (FAMEs). The co-solvents water, chloroform, diethyl ether, and n-hexane were used for modifying the supercritical medium to affect the product yields in SrTiO3-catalyzed process. The SrTiO3 nanocatalyst was photochemically prepared and the leaching of catalysts into the products was evaluated. Results showed that for all products except oxygenates, the addition of diethyl ether and chloroform to methanol had a slightly positive effect on the production yields. For all products, n-hexane co-solvent showed the best performance with production yields of 16.65, 2.42, 2.12, and 0.57 mg.g(biomass)(-1) for FAMEs, oxygenates, hydrocarbons, and aromatics, respectively. Furthermore, the water showed no significant effect on production yields except in the case of oxygenates. The results may be due to the high ability of n-hexane for dissolving the biomass in the reaction condition. Also, the ICP-OES detected no trace amounts of catalyst in the final product and it confirms that the photochemical method for catalyst preparation can prevent the catalyst leaching. (C) 2020 Elsevier Ltd. All rights reserved.