煤焦富氧燃烧特性及动力学研究

doi:10.3969/j.issn.2095-2198.2023.02.002

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分别采用微型流化床反应分析仪和热重分析仪研究了不同粒径（106~270 μm）的煤焦在纯氧气氛下的燃烧反应特性，并求解了反应动力学.结果表明：随着粒径减小，煤焦燃烧反应速率增大，反应所需时间随之减少，MFBRA中煤焦在900 ℃时完全燃烧所需时间不到20 s；通过两种动力学计算方法得出TGA中的机理模型为成核与生长（n=2），其中G(x)=［-ln(1-x)^1/2；由于内扩散的原因，在MFBRA中测得的表观活化能整体上都小于TGA.

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关键词: 微型流化床')" href="#">

微型流化床热重煤焦富氧燃烧反应动力学

Abstract:

Micro-fluidized bed reaction analyzer (MFBRA) and thermogravimetric analyzer (TGA) were used to analyze the combustion reaction characteristics of chars with different particle sizes (106~270 μm) in a pure oxygen atmosphere and the reaction kinetics were studied.The results showed with the decrease of particle sizes,the combustion reaction rate of coal char increases,and the reaction time decreases.The complete combustion of char in MFBRA at 900 ℃ takes less than 20 seconds.The mechanism model in TGA is nucleation and growth (n=2),where G(x)=［-ln(1-x)^1/2.Due to internal diffusion,the apparent activation energy measured in MFBRA is generally lower than that in TGA.

Key words: micro-fluidized bed')" href="#">

micro-fluidized bed thermogravimetric coal char oxygen-enriched combustion reaction kinetics

出版日期: 2023-04-29 发布日期: 2024-06-06 整期出版日期: 2023-04-29

ZTFLH:

TQ530.2

基金资助:

辽宁省教育厅面上项目(LJKZ0450)

引用本文:

夏志豪, 李吉嘉, 张月良, 许光文, 宋兴飞.

煤焦富氧燃烧特性及动力学研究 [J]. 沈阳化工大学学报, 2023, 37(2): 104-111.
XIA Zhihao, LI Jijia, ZHANG Yueliang, XU Guangwen, SONG Xingfei.

Oxygen-Enriched Combustion Characteristics and Kinetics of Char from Coal Pyrolysis . Journal of Shenyang University of Chemical Technology, 2023, 37(2): 104-111.

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https://xuebao.syuct.edu.cn/CN/10.3969/j.issn.2095-2198.2023.02.002 或 https://xuebao.syuct.edu.cn/CN/Y2023/V37/I2/104

［1］霍威,钟思青.不同粒径褐煤的热解特性及煤焦结构［J］.煤炭转化,2017,40(1):8-12.

［2］常娜,陈延信,甘艳萍.微负压系统中不同粒径煤粉热解半焦特性研究［J］.煤炭转化,2014,37(1):65-68.

［3］崔丽杰,李欣,李松庚,等.霍林河褐煤及其热解焦油管式炉热解试验研究［J］.煤炭科学技术,2012,40(10):124-128.

［4］崔丽杰,姚建中,林伟刚.喷动-载流床中粒径对内蒙霍林河褐煤快速热解产物的影响［J］.过程工程学报,2003,3(2):103-108.

［5］姜中孝,段伦博,陈晓平.水蒸气对O2/CO2气氛下煤焦燃烧特性的影响［J］.煤炭学报,2013,38(3):466-472.

［6］张守玉,吕俊复,王文选,等.热处理对煤焦反应性及微观结构的影响［J］.燃料化学学报,2004,32(6):673-678.

［7］TAN J X,HE Y,YUAN Y,et al.Structure and Combustion Characteristics of Semi-Cokes from a Pilot-Scale Entrained Flow Gasifier Using Oxygen-Enriched Air［J］.Journal of the Energy Institute,2021,97:80-91.

［8］BU C S,GMEZ-BAREA A,LECKNER B,et al.The Effect of H2O on the Oxy-Fuel Combustion of a Bituminous Coal Char Particle in a Fluidized Bed:Experiment and Modeling［J］.Combustion and Flame,2020,218:42-56.

［9］戴财胜,刘晓芳,戴谨泽,等.低阶煤热解半焦燃烧性能的影响因素［J］.煤炭转化,2016,39(3):44-50.

［10］旷戈,张济宇.恒温热重法单颗粒煤焦燃烧动力学［J］.化工学报,2006,57 (1):140-145.

［11］李文军,陈姗姗,陈艳鹏,等.基于热重的煤热解反应动力学试验研究［J］.中国煤炭,2020,46(3):84-89.

［12］吕太,张翠珍,吴超.粒径和升温速率对煤热分解影响的研究［J］.煤炭转化,2005,28(1):17-20.

［13］MA C,ZOU C,ZHAO J X,et al.Combustion Behavior of Chars Derived from Coal Pyrolysis under a Co-Containing Atmosphere［J］.Thermochimica Acta,2020,688:178576.

［14］吕帅,吕国钧,蒋旭光,等.印尼褐煤湿煤末(煤泥)热解和燃烧特性及动力学分析［J］.煤炭学报,2014,39(3):554-561.

［15］梁秀俊,阎维平.O2/CO2气氛下煤焦燃烧反应动力学特性试验研究［J］.华东电力,2009,37(12):2104-2108.

［16］杨旭,刘雅宁,余剑,等.微型流化床内混合特性的数值模拟［J］.化工学报,2014,65(9):3323-3330.

［17］WANG F,ZENG X,GENG S L,et al.Distinctive Hydrodynamics of a Micro Fluidized Bed and Its Application to Gas–Solid Reaction Analysis［J］.Energy & Fuels,2018,32(4):4096-4106.

［18］余剑,朱剑虹,岳君容,等.微型流化床反应动力学分析仪的研制与应用［J］.化工学报,2009,60(10):2669-2674.

［19］余剑,朱剑虹,郭凤,等.生物质在微型流化床中热解动力学与机理［J］.燃料化学学报,2010,38(6):666-672.

［20］LIU X H,XU G W,GAO S Q.Micro Fluidized Beds:Wall Effect And Operability［J］.Chemical Engineering Journal,2008,137(2):302-307.

［21］胡丹丹,耿素龙,曾玺,等.返混对气-固反应特性测试和活化能表征的影响［J］.化工学报,2021,72(3):1354-1363.

［22］YU J,YAO C B,ZENG X,et al.Biomass Pyrolysis in a Micro-Fluidized Bed Reactor:Characterization and Kinetics［J］.Chemical Engineering Journal,2011,168(2):839-847.

［23］姜微微,郝文倩,刘雪景,等.微型流化床内菱镁矿轻烧反应特性及动力学［J］.化工学报,2019,70(8):2928-2937.

［24］王婷婷,曾玺,韩振南,等.微型流化床中生物质半焦水蒸气气化反应特性及动力学研究［J］.化工学报,2022,73(1):294-307.

［25］季颖,曾玺,余剑,等.微型流化床反应分析仪中煤半焦水蒸气气化反应特性［J］.化工学报,2014,65(9):3447-3456.

［26］王芳,曾玺,王永刚,等.微型流化床与热重测定煤焦非等温气化反应动力学对比［J］.化工学报,2015,66(5):1716-1722.

［27］CRIADO J M,MORALES J.Thermal Decomposition Reactions of Solids Controlled by Diffusion and Phase-Boundary Processes:Possible Misinterpretation of the Mechanism from Thermogravimetric Data［J］.1977,19(3):305-317.

［28］CRIADO J M,ORTEGA A,GOTOR F.Correlation Between the Shape of Controlled-Rate Thermal Analysis Curves and the Kinetics of Solid-State Reactions［J］.1990,157(1):171-179.

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