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首页> 外文期刊>Fuel >An innovative nanocatalyst α-Fe_2O_3/AlOOH processed from gibbsite rubbish ore for efficient biodiesel production via utilizing cottonseed waste oil
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An innovative nanocatalyst α-Fe_2O_3/AlOOH processed from gibbsite rubbish ore for efficient biodiesel production via utilizing cottonseed waste oil

机译：从Gibbsite垃圾矿石加工的创新纳米催化剂α-FE_2O_3 / ALOOH，通过利用棉籽废油来高效的生物柴油生产

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摘要

A novel dispersed ?-Fe2O3 on AlOOH (Fe2+/Fe3+/AlOOH) acid catalyst synthesized via utilizing a deposition hydrothermal route and thoroughly characterized using XRD, SAED-TEM, FTIR, N2 sorptiometry and XPS measurements was employed for biodiesel production via trans-esterification of waste cooking cottonseed oil (WCO). The resulting catalysts own high surface texturing and acid sites loading characteristics especially 12% Fe2+/Fe3+/AlOOH that owns the highest surface area value (323 m2 g? 1), uniform 4 nm mesopores, and high total acid sites loading of 0.45 mmol g? 1. The optimum conditions for the transesterification of waste cooking oil (WCO) of the latter catalyst were 60 ?C, methanol:WCO molar ratio of 6:1, 3% catalyst mass ratio, and 180 min reaction time to achieve 95% FAME yield. This catalyst exhibited high reusability and enabled facile separation and production of high quality biodiesel comparable to the universal ASTM standards. XPS results indicated that the catalytic reaction is promoted on the 12% catalyst when Fe3+/Fe2+ atomic ratios equal 4:1 is combined with AlOOH of appreciable OH bonds. Although 8% catalyst exposed 100% ratio of AlOOH as the 12% catalyst however, the strong interaction exhibited in the later catalyst besides boosting the ratio of Fe3+ that owns two surface active sites; in front of only one on the former, appears to enhance the FAME yield. The calculated activation energy of the reaction indicates a value of 51.54 KJ mol? 1 and from the thermodynamic parameters (?H?, ?S? and ?G?) the reaction appears to be non-spontaneous and thus accommodated endothermicity beside an entropy decrease.
机译：通过使用XRD，SAED-TEM，FTIR，N2 SORPTIICORRY和XPS测量合成的ALOOH（Fe2 + / Fe3 + / ALOOH）酸催化剂的一种新的分散的α-Fe2O3在ALOOH（Fe2 + / Fe3 + / alAlOOH）酸催化剂上合成并使用XRD，SAED-TEM，FTIR，N2 SortiCometry和XPS测量进行了彻底表征废物烹饪棉籽油（WCO）。所得催化剂拥有高表面纹理和酸性位点，尤其是具有最高表面积值（323m 2 G-1）的12％Fe2 + / Fe3 + / AlOOH，均匀的4nm中孔，高总酸性位点10.45mmol g还1.后一催化剂废料烹饪油（WCO）酯交换的最佳条件为60℃，甲醇：WCO摩尔比为6：1，3％催化剂质量比，180分钟的反应时间达到95％的名称屈服。该催化剂表现出高可重用性，并使能够与通用ASTM标准相当的高质量生物柴油的体外分离和生产。 XPS结果表明，当Fe3 + / Fe2 +原子比例等于4：1时，催化反应在12％催化剂上促进在12％催化剂上，与可明显的OH键合的ALOOH。尽管8％催化剂暴露于100％的AlOOH与12％催化剂的比例，但是，除了促进具有两个表面活性位点的Fe3 +的比率之外，在后续催化剂中表现出的强相互作用;在前者上只有一个，似乎提高了名称产量。计算的反应的激活能量表示值51.54 kJ摩尔？从热力学参数（ΔH≤，Δs≤和Δ，Δs，反应似乎是非自发的，因此在熵下减少旁边的吸热。

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