黏胶纤维/杨木共水热炭的燃烧和热解特性

邢语彤; 张一唯; 卢平

doi:10.13205/j.hjgc.202308017

黏胶纤维/杨木共水热炭的燃烧和热解特性

doi: 10.13205/j.hjgc.202308017

南京师范大学能源与机械工程学院, 南京 210023

基金项目:

国家自然科学基金(51476079)

详细信息

作者简介:
邢语彤(1998-),女,硕士研究生,主要从事生物质热化学转化与利用研究。xingyt0902@163.com

通讯作者:
卢平(1968-),男,博士,教授,主要从事燃烧及污染物控制,生物质热化学转化与利用等研究。luping@njnu.edu.cn

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出版历程
- 收稿日期: 2022-09-01
- 网络出版日期: 2023-11-15

COMBUSTION AND PYROLYSIS CHARACTERISTICS OF HYDROCHARS BY CO-HYDROTHERMAL CARBONIZATION OF VISCOSE FIBER AND POPLAR WOOD

School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 210023, China

摘要

摘要: 水热炭化是极具发展前景的高水分生物质和有机固废预处理方法。以黏胶纤维(VF)与杨木(PW)为对象,采用水热反应釜,研究2种原料掺混比对水热炭工业分析、元素分析和热值演变的影响,并结合热重分析,评价水热炭的热解和燃烧性能。结果表明:水热处理能够显著提升原料的燃料性能,原料中的固定碳和碳元素含量分别由8.48%和41.94%增加至54.28%和73.89%,相应的热值可达到29.22 MJ/kg,同时原料中的挥发分和氧元素含量显著降低,由87.02%和62.45%分别最低降至45.01%和20.19%。2种原料共水热处理,一方面能够拓宽水热炭热解失重温度区间,降低热解活化能;另一方面能够显著改善水热炭的着火和燃烧性能,使得共水热炭的燃烧最大速率温度和温度区间向高温转移,并降低燃烧反应活化能。随着黏胶纤维掺混比的增加,水热炭热解和燃烧稳定性均有所提高,且当两者质量掺混比为5∶5时,共水热炭的综合热解指数、综合燃烧指数和着火指数均达到最大,分别为6.13×10^-8、9.64×10^-7和5.27×10^-5。研究表明,黏胶纤维与杨木的共水热,获得高质量的固体燃料,有效改善了单一原料水热炭化时存在的不足,为黏胶纤维等固废能源化利用提供了参考。
- 水热炭化 /
- 黏胶纤维 /
- 杨木 /
- 燃烧 /
- 热解 /
- 热重分析
Abstract: Hydrothermal carbonization is a promising method for pretreatments of high moisture biomass and organic solid wastes. In this paper, hydrochars were prepared from two raw samples of viscose fiber (VF) and poplar wood (PW) in a hydrothermal reactor, the effects of the blending ratio of raw materials on proximate analysis, ultimate analysis, and caloric value of as-prepared hydrochars, and the combustion and pyrolysis characteristics of hydrochars were evaluated by the thermogravimetric analyzer. The results indicated that hydrothermal carbonization can improve the fuel characteristics of raw materials, the contents of fixed carbon and oxygen in raw materials increased significantly from 8.48% and 41.94% to 54.28% and 73.89%, respectively, and the relevant calorific value achieved 29.22 MJ/kg; at the same time, the contents of volatile matter and oxygen decreased significantly from 87.02% and 62.45% to 45.01% and 20.19%, respectively. Through co-hydrothermal pretreatment of raw materials, on one hand, the temperature interval of hydrochar pyrolysis was extended, and the relevant pyrolysis activation energy was decreased; on the other hand, the ignition and combustion characteristics were improved significantly, which made the maximum combustion rate temperature and its temperature interval shift towards a higher temperature zone, and the activation energy of combustion reaction was decreased. The stability of combustion and pyrolysis of hydrochars was enhanced with the increase of the blending ratio of viscose fiber. When the blending ratio of viscose fiber to poplar wood was 5∶5, the comprehensive pyrolysis index, comprehensive combustion index, and ignition index all achieved the maximum values of 6.13×10^-8, 9.64×10^-7 and 5.27×10^-5, respectively. This study showes that the co-hydrothermal of viscose fibers with poplar, to gain high mass solid fuel, effectively improves the shortcomings of hydrothermal carbonization of single raw materials, and provides a reference for the energy utilization of solid waste such as viscose fiber.
- hydrothermal carbonization /
- viscose fiber /
- poplar wood /
- combustion /
- pyrolysis /
- thermogravimetric analyzer

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