升温速率、粒度、好氧气氛和流量对华甸油页岩热解特性的影响

IF 0.8 4区 工程技术 Q4 CHEMISTRY, MULTIDISCIPLINARY
Lili Li, Fuqun Zhang, Haibo Wang
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引用次数: 0

摘要

为掌握油页岩在不同条件下的热解特性,我们采用TG-DTA、FT-IR、XRD等方法对华甸油页岩进行了分析,比较了升温速率、气体流速、热解气氛、粒度等因素对其热解行为的影响。结果表明:当升温速率从5℃/min增加到15℃/min时,相应温度从439.1℃增加到461.6℃,质量损失率从12.42%增加到13.51%;当粒径从0.075 mm增加到0.355 mm时,最大失重速率温度、终止温度和失重速率均增加,但初始温度从336.1℃降低到275.8℃。当氧气浓度从10%增加到30%时,初始温度、最大失重速率温度和终止温度随着氧气浓度的增加而降低,但失重速率从17.25%增加到17.69%;当气体流量从30增加到100 mL/min时,终止温度和失重速率增加,但初始温度从366.5℃降低到303.9℃。采用Coats-Redfern法计算了不同升温速率和不同粒径下的热解动力学参数。结果表明:活化能随升温速率的增大而增大,随粒径的增大而减小;该研究对优化以华甸油页岩为原料的热转化工艺具有重要意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Effects of Heating Rate, Particle Size, Aerobic Atmosphere, and Flow Rate on the Pyrolysis Characteristics of Huadian Oil Shale

Effects of Heating Rate, Particle Size, Aerobic Atmosphere, and Flow Rate on the Pyrolysis Characteristics of Huadian Oil Shale

To master the pyrolysis characteristics of oil shale under diverse conditions, we analyzed Huadian oil shale by TG-DTA, FT-IR, and XRD, and compared the effects of heating rate, gas flow rate, pyrolysis atmosphere, and particle size on its pyrolysis behavior. The results show that when the heating rate increases from 5 to 15°C/min, the corresponding temperature increases from 439.1 to 461.6°C, and the mass loss rate increases from 12.42% to 13.51%. When the particle size increased from 0.075 to 0.355 mm, the maximum mass loss rate temperature, termination temperature, and mass loss rate increased, but the initial temperature decreased from 336.1 to 275.8°C. When the oxygen concentration increased from 10 to 30%, the initial temperature, maximum mass loss rate temperature, and termination temperature decreased with the increase of oxygen concentration, but the mass loss rate increased from 17.25 to 17.69%, as well as when the gas flow rate increased from 30 to 100 mL/min, the termination temperature and mass loss rate increased, but the initial temperature decreased from 366.5 to 303.9°C. The Coats-Redfern method was used to calculate the pyrolysis kinetics parameters at different heating rates and different particle sizes. The results show the activation energy increases with increasing heating rates while decreasing with increasing particle sizes. This study is of great significance in optimizing the thermal conversion process of Huadian oil shale as raw material.

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来源期刊
Solid Fuel Chemistry
Solid Fuel Chemistry CHEMISTRY, MULTIDISCIPLINARY-ENERGY & FUELS
CiteScore
1.10
自引率
28.60%
发文量
52
审稿时长
6-12 weeks
期刊介绍: The journal publishes theoretical and applied articles on the chemistry and physics of solid fuels and carbonaceous materials. It addresses the composition, structure, and properties of solid fuels. The aim of the published articles is to demonstrate how novel discoveries, developments, and theories may be used in improved analysis and design of new types of fuels, chemicals, and by-products. The journal is particularly concerned with technological aspects of various chemical conversion processes and includes papers related to geochemistry, petrology and systematization of fossil fuels, their beneficiation and preparation for processing, the processes themselves, and the ultimate recovery of the liquid or gaseous end products.
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