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生物质化学工程 ›› 2019, Vol. 53 ›› Issue (4): 26-30.doi: 10.3969/j.issn.1673-5854.2019.04.004

• 研究报告 • 上一篇    下一篇

低阶煤与玉米芯低温共热解的产物特性分析

柯萍(),何选明*(),刘靖,冯东征   

  1. 湖北省煤转化与新型炭材料重点实验室, 武汉科技大学, 湖北 武汉 430081
  • 收稿日期:2018-04-02 出版日期:2019-07-30 发布日期:2019-08-05
  • 通讯作者: 何选明 E-mail:keping_WUST@163.com;xmingh999@126.com
  • 作者简介:柯萍(1993-),女,湖北鄂州人,硕士生,主要从事生物质与低阶煤的利用研究; E-mail:keping_WUST@163.com
  • 基金资助:
    国家自然科学基金资助项目(51706160)

Characteristics of Low Temperature Co-pyrolysis Products of Low-rank Coal and Corncob

Ping KE(),Xuanming HE*(),Jing LIU,Dongzheng FENG   

  1. Hubei Coal Conversion and New Carbon Materials Key Laboratory, Wuhan University of Science and Technology, Wuhan 430081, China
  • Received:2018-04-02 Online:2019-07-30 Published:2019-08-05
  • Contact: Xuanming HE E-mail:keping_WUST@163.com;xmingh999@126.com
  • Supported by:
    国家自然科学基金资助项目(51706160)

摘要:

采用低温干馏装置对不同玉米芯加入量的褐煤/玉米芯混合物进行低温共热解实验。结果表明:当玉米芯加入量为30%时,焦油产率最大为11.70%,比褐煤单独热解提高了53.75%。随着玉米芯的加入量增加,热解气中CO、CH4和H2含量逐渐增大。对热解焦油进行GC-MS检测,发现添加30%玉米芯后脂肪族质量分数从褐煤单独热解的24%提高到了30.67%,酚类质量分数从6.29%提高到了18.49%,杂原子质量分数从29.75%降低到了13.33%,一定程度上实现了焦油的轻质化和高品质化。对热解半焦进行SEM、比表面积分析和热值测定,发现共热解半焦表面变粗糙,孔隙结构得到改善,热值明显高于褐煤单独热解半焦热值。

关键词: 褐煤, 玉米芯, 共热解, 半焦

Abstract:

Low temperature distillation equipment was used to study the low temperature co-pyrolysis of lignite and corncob under different proportions. The results showed that when the corncob content was 30%, the tar yield reached 11.70%, which was 53.75% higher than that of the lignite mono-pyrolysis. With the addition of corncob, the contents of CO, CH4 and H2 in pyrolysis gas gradually increased. The results of GC-MS showed that as adding 30% corncob, aliphatic content increased from 24% to 30.67%, the phenol content increased from 6.29% to 18.49%, heteroatom content decreased from 29.75% to 13.33%, which achieved a substantial pyrolysis of tar and high-quality tar generation. The SEM, BET and heat value analysis of pyrolysis char showed that the surface of co-pyrolysis char became more rough, and the pore structure was improved. The heat value of co-pyrolysis char was obviously higher than the lignite pyrolysis separately.

Key words: lignite, corncob, co-pyrolysis, char

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