化工进展 ›› 2023, Vol. 42 ›› Issue (6): 2874-2883.DOI: 10.16085/j.issn.1000-6613.2022-1500

• 能源加工与技术 • 上一篇    下一篇

皂脚热解-催化气态加氢制备生物燃料

李栋先1(), 王佳1,2(), 蒋剑春1,2   

  1. 1.南京林业大学化学工程学院,江苏 南京 210037
    2.中国林业科学研究院林产化学工业研究所,江苏 南京 210042
  • 收稿日期:2022-08-15 修回日期:2022-10-14 出版日期:2023-06-25 发布日期:2023-06-29
  • 通讯作者: 王佳
  • 作者简介:李栋先(1996—),男,硕士研究生,研究方向为有机固废热化学转化。E-mail:ldx@njfu.edu.cn
  • 基金资助:
    国家自然科学基金(52006106);国家重点研发计划(2019YFB1504001)

Producing biofuels from soapstock via pyrolysis and subsequent catalytic vapor-phase hydrotreating process

LI Dongxian1(), WANG Jia1,2(), JIANG Jianchun1,2   

  1. 1.College of Chemical Engineering, Nanjing Forestry University, Nanjing 210037, Jiangsu, China
    2.Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, Jiangsu, China
  • Received:2022-08-15 Revised:2022-10-14 Online:2023-06-25 Published:2023-06-29
  • Contact: WANG Jia

摘要:

皂脚的资源化、高值化利用对减少环境污染和实现碳中和具有重要的意义。本文以皂脚为原料,采用双级加压固定床为反应器,对其进行热解-催化气态加氢处理以制备生物燃料。研究了皂脚热解-非催化和催化气态加氢处理对产物正构烷烃的影响,并提出了皂脚热解-催化气态加氢制备正构烷烃的反应机理。以最大化生成正构烷烃为目标,又对热解温度和气态加氢温度工艺参数进行了优化处理。实验结果表明,与非催化条件相比,在Ni/Al2O3-SiO2催化剂的作用下,热解初级中间体被完全脱氧和氢化,使得C5~C17正构烷烃的相对含量由15.8%增加至97.3%。随着热解温度的升高,正构烷烃的产量先升高再降低,550℃时产量最高;随着气态加氢温度的升高,正构烷烃的产量逐渐降低,300℃时产量最高。

关键词: 皂脚, 热解, 加氢, 生物燃料, 正构烷烃

Abstract:

Chemical upcycling soapstock into biofuels is of great significance to reduce environmental pollution and achieve carbon neutrality. Biofuels were produced from soapstock by pyrolysis and subsequent catalytic vapor-phase hydrotreating in a pressurized two-stage fixed bed reactor. The effects of soapstock pyrolysis, non-catalytic and catalytic vapor-phase hydrotreating on the production of n-alkanes were explored. The reaction mechanism of n-alkanes obtained from the pyrolysis and catalytic vapor-phase hydrotreating of soapstock was proposed. To maximize the production of n-alkanes, the process parameters including pyrolysis temperature and hydrogenation temperature were optimized. Experimental results indicated that the primary intermediates of pyrolysis were completely deoxygenated and hydrogenated with Ni/Al2O3-SiO2 catalyst, and the relative content of C5—C17n-alkanes increased from 15.8% to 97.3%, compared with that of the non-catalytic. The yield of n-alkanes initially increased and then decreased with increase of pyrolysis temperature, and the highest yield was observed at 550℃. The yield of n-alkanes gradually decreased with increase of hydrogenation temperature, and the highest yield was observed at 300℃.

Key words: soapstock, pyrolysis, hydrogenation, biofuel, n-alkane

中图分类号: 

版权所有 © 《化工进展》编辑部


本系统由北京玛格泰克科技发展有限公司设计开发 技术支持:support@magtech.com.cn