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首页> 外文期刊>Energy Conversion & Management >Preparation and catalytic performance in esterification of a bamboo-based heterogeneous acid catalyst with microwave assistance
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Preparation and catalytic performance in esterification of a bamboo-based heterogeneous acid catalyst with microwave assistance

机译：微波辅助竹基多相酸催化剂的制备及催化酯化性能

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With the assistance of microwave, a novel bamboo-based heterogeneous acid catalyst is prepared by partial carbonization followed by sulfonation and utilized in esterification of oleic acid with methanol for biodiesel production. The catalyst is further characterized by elemental analysis, acid-base titration, FF-IR, XRD, SEM and nitrogen adsorption-desorption analysis to reveal its physical and chemical properties. After carbonization at 350 degrees C for 2 h and sulfonation at 105 degrees C for 10 min, the thus prepared catalyst possesses amorphous carbon structure with sulfonic group density of 1.80 mmol/g. The catalyst supplies esterification conversion efficiency of 97.31% with the esterification temperature of 65 degrees C, esterification duration of 1 h, catalyst loaded percentage of 5 wt% and molar ratio of methanol to oleic acid of 8. Microwave effectively shortens the required durations of both sulfonation and esterification. In addition, the bamboo derived heterogeneous acid catalyst gains satisfying regenerability and efficiency of 96.22% is restored after 5 cycles.
机译：在微波的辅助下，通过部分碳化然后进行磺化制备了一种新型的竹基多相酸催化剂，并将其用于油酸与甲醇的酯化反应以生产生物柴油。通过元素分析，酸碱滴定，FF-IR，XRD，SEM和氮吸附-脱附分析进一步表征该催化剂，以揭示其物理和化学性质。在350℃下碳化2小时并在105℃下磺化10分钟后，由此制得的催化剂具有无定形碳结构，磺酸基密度为1.80mmol / g。催化剂的酯化温度为65℃，酯化持续时间为1 h，催化剂负载率为5 wt％，甲醇与油酸的摩尔比为8，酯化转化效率为97.31％。微波有效地缩短了两者所需的时间磺化和酯化。此外，竹子衍生的多相酸催化剂获得了令人满意的可再生性，效率提高了96.22％，经过5个循环。

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