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首页> 外文期刊>International journal of green energy >TRANSESTERIFICATION OF CHINESE SPICEHUSH OIL BY CaMgZn OXIDE CATALYSTS
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TRANSESTERIFICATION OF CHINESE SPICEHUSH OIL BY CaMgZn OXIDE CATALYSTS

机译：CaMgZnZnO催化酯化中国香料油

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摘要

The seed of Chinese Spicehush, containing 41.87% crude oil with 24.54% saturated acids and 75.32% unsaturated acids, could potentially be an alternative source of biodiesel. The problems of water pollution and the high purification cost of biodiesel can be avoided by using solid basic catalysts. The catalytic efficiency of CaMgZn oxide for the transesterification of Spicehush oil was evaluated. Catalysts were prepared via conventional co-precipitation methods and were characterized using X-ray diffraction, scanning electron microscopy, and the Brunauer-Emmett-Teller equation. The catalyst with a Ca/Mg/Zn molar ratio of 2:1:7 exhibited excellent catalytic performance and possessed a unique meso-porous structure with a surface area of 51.35 m~2g~-1 and an average pore diameter of 11.6 nm. The calcination temperature largely affected the structural and catalytic properties of the catalyst. Under the optimal transesterification conditions at 65℃ (catalyst amount of 5 wt.%, molar ratio of methanol to oil of 12, reaction time of 2 h), a high conversion ratio of 92.3% can be obtained. The biodiesel conversion rate did not exhibit a linear relationship with the amount of CaMgZn catalyst and reached maximum values at the catalyst amount of 5 wt. %. The CaMgZn solid basic catalysts could be applied as an alternative to traditional homogenous catalysts.
机译：含有41.87％原油，24.54％饱和酸和75.32％不饱和酸的中国Spicehush种子可能是生物柴油的替代来源。通过使用固体碱性催化剂可以避免水污染和生物柴油净化成本高的问题。评价了CaMgZn氧化物对Spicehush油进行酯交换反应的催化效率。通过常规共沉淀方法制备催化剂，并使用X射线衍射，扫描电子显微镜和Brunauer-Emmett-Teller方程表征。 Ca / Mg / Zn摩尔比为2：1：7的催化剂表现出优异的催化性能，并具有独特的介孔结构，表面积为51.35 m〜2g〜-1，平均孔径为11.6 nm。煅烧温度在很大程度上影响催化剂的结构和催化性能。在65℃的最佳酯交换条件下（催化剂量为5 wt。％，甲醇与油的摩尔比为12，反应时间为2 h），可获得92.3％的高转化率。生物柴油转化率与CaMgZn催化剂的量没有线性关系，并且在催化剂量为5wt。％时达到最大值。 ％。 CaMgZn固体碱性催化剂可以替代传统的均相催化剂。

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