高等学校化学学报 ›› 2016, Vol. 37 ›› Issue (6): 1123.doi: 10.7503/cjcu20160040

• 物理化学 • 上一篇    下一篇

稻壳碳基固体酸催化剂的制备及在木糖脱水制备糠醛反应中的催化性能

梁玉, 陈志浩, 梁宝炎, 胡哲, 杨晓敏(), 王子忱   

  1. 吉林大学化学学院, 长春 130012
  • 收稿日期:2016-01-08 出版日期:2016-06-10 发布日期:2016-04-30
  • 作者简介:联系人简介: 杨晓敏, 女, 博士, 讲师, 主要从事生物质综合利用的研究. E-mail:xmyang@jlu.edu.cn
  • 基金资助:
    国家自然科学基金(批准号: 51502108)、 高等学校博士学科点专项科研基金(批准号: 20130061120018)和吉林省科技发展计划项目(批准号: 20150520016JH)资助

Preparation of Rice Husk Carbon-based Solid Acid Catalyst for the Dehydration of Xylose to Furfural

LIANG Yu, CHEN Zhihao, LIANG Baoyan, HU Zhe, YANG Xiaomin*(), WANG Zichen   

  1. College of Chemistry, Jilin University, Changchun 130012, China
  • Received:2016-01-08 Online:2016-06-10 Published:2016-04-30
  • Contact: YANG Xiaomin E-mail:xmyang@jlu.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.51502108), the Research Fund for the Doctoral Program of Higher Education of China(No.20130061120018) and the Development Project of Science and Technology of Jilin Province, China(No.20150520016JH)

摘要:

以工业生产中碱法溶硅剩余的稻壳残渣为碳源, 采用硫酸磺化法制备稻壳碳基固体酸催化剂, 考察了其催化木糖脱水制备糠醛的性能. 采用红外光谱、 元素分析及表面酸浓度测定等手段对催化剂进行了表征. 对固体酸催化剂的制备条件进行了优化, 所得催化剂的表面酸浓度可达1.03 mmol/g. 以木糖脱水制备糠醛为模型反应, 考察了溶剂类别、 反应温度和反应时间对固体酸催化剂催化性能的影响. 实验结果表明, 以二甲基亚砜(DMSO)为反应溶剂效果优于水, 并且随着反应温度的升高和反应时间的延长, 反应产率逐渐增加, 最高可达75.8%. 此外, 还对催化剂的循环性能进行了研究, 探讨了其失活原因和再生方法.

关键词: 碳基固体酸催化剂, 磺化, 木糖, 糠醛

Abstract:

A carbon-based solid acid catalyst, prepared by the sulfonation of rice husk carbon, was proved to be an efficient and environmental benign catalyst for the dehydration of xylose to furfural. The catalyst was characterized by Fourier transform infrared spectroscopy(FTIR), elemental analysis and Scanning Electronic Microscopy(SEM). The total acid site concentrations of the catalyst samples were obtained using standard acid-base back titration. The acid site concentration of 1.03 mmol/g was obtained when the 4.0 g of rice husk carbon was sulfonated by 15 mL of H2SO4 at 150 ℃ for 8 h. The effects of solvent, reaction temperature and time on the dehydration of xylose to furfural catalyzed by the rice husk carbon-based solid acid catalyst were studied. The results indicate that the yield of furfural increases gradually with the increase of reaction temperature and with the prolonger of the reaction time. The catalytic performance of the synthesized catalyst is better when using DMSO as reaction solvent than that of using water as solvent. A maximum furfural yield of 75.8% was achieved. The repeated usability and regeneration of the catalyst was investigated.

Key words: Carbon-based solid acid catalyst, Sulfonation, Xylose, Furfural

中图分类号: 

TrendMD: