化工进展 ›› 2022, Vol. 41 ›› Issue (7): 3608-3614.DOI: 10.16085/j.issn.1000-6613.2021-1876

• 工业催化 • 上一篇    下一篇

Na2CO3/CF固体碱对菜籽油酯交换反应的催化性能

赵建兵1(), 杨丹1, 舒原草1, 朱俊波2, 普仕萍1, 宋晓丹1, 刘守庆1, 柴希娟2, 李雪梅1()   

  1. 1.西南林业大学化学工程学院,西南地区林业生物质资源高效利用国家林业和草原局重点实验室,云南 昆明 650224
    2.西南林业大学材料工程学院,云南 昆明 650224
  • 收稿日期:2021-09-01 修回日期:2021-12-21 出版日期:2022-07-25 发布日期:2022-07-23
  • 通讯作者: 李雪梅
  • 作者简介:赵建兵(1997—),男,硕士研究生,主要从事碳材料应用及功能化改性研究。E-mail:1750255713@qq.com
  • 基金资助:
    国家自然科学基金(31960296);云南省大学生创新创业项目(202010677095);云南省教育厅教师类项目(2018JS332);云南省农业联合基金(2018FG001-058);西南地区林业生物质资源高效利用国家林业和草原局重点实验室开放项目(2020-KF11)

Preparation of Na2CO3 /CF solid base and its catalytic transesterification of rapeseed oil

ZHAO Jianbing1(), YANG Dan1, SHU Yuancao1, ZHU Junbo2, PU Shiping1, SONG Xiaodan1, LIU Shouqing1, CHAI Xijuan2, LI Xuemei1()   

  1. 1.National Joint Engineering Research Center for Highly-Efficient Utilization Technology of Forest Biomass Resources, College of Chemical Engineering, Southwest Forestry University, Kunming 650224, Yunnan, China
    2.College of Materials Science and Engineering, Southwest Forestry University, Kunming 650224, Yunnan, China
  • Received:2021-09-01 Revised:2021-12-21 Online:2022-07-25 Published:2022-07-23
  • Contact: LI Xuemei

摘要:

以Na2CO3为活性组分、泡沫炭(CF)为载体,本文借助等体积浸渍法制备了Na2CO3/CF非均相固体碱催化剂,通过SEM、SEM-EDS、FTIR、XRD、BET对其结构性能进行分析表征,结果显示:Na2CO3/CF的比表面积为182m2/g,负载的Na2CO3以细小颗粒的形式均匀分布于CF泡壁表面,平均粒径<350nm。以菜籽油-甲醇体系为对象,分析了Na2CO3/CF的催化活性及重复利用性,并对酯交换反应的工艺条件进行优化,结果显示,在Na2CO3/CF用量为油重10%、反应时间180min、醇油物质的量比为27∶1、反应温度65℃的条件下,反应转化率高达97.80%,该催化剂重复利用5次,转化率仍可达94.48%。研究结果对开发以强碱弱酸盐为活性中心的碳基固体碱高效催化剂提供了新思路。

关键词: 生物柴油, 醇解反应, 泡沫炭, 固体碱催化剂, 失活, 再生

Abstract:

With Na2CO3 as active component and carbon foam (CF) as carrier, solid base catalyst of Na2CO3/CF was prepared by volume impregnation method. Then, its structure and properties were characterized by SEM, SEM-EDS, FTIR, XRD, and BET. The specific surface area of the Na2CO3/CF catalyst was 182m2/g and the loaded Na2CO3 was evenly deposited on the cell wall surface of CF as fine grains with an average particle size less than 350nm. Subsequently, the catalytic activity and reusability of Na2CO3/CF were studied in the transesterification of rapeseed oil with methanol, and the process conditions were optimized. The optimal conditions were Na2CO3/CF dosage 10% (of oil weight), reaction time 180min, mole ratio of alcohol to oil 27/1, reaction temperature 65℃, and the resulting conversion was 97.80%. Moreover, the conversion still maintained 94.48% with the catalyst used for five times. The study would provide a new idea for the development of carbon-based solid base catalyst with high efficiency using the salt formed by strong base and weak acid as active center.

Key words: biodiesel, methanolysis, carbon foam, solid base catalyst, deactivation, regeneration

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