对糠醛渣和低阶长焰煤共热解特性进行系统性研究,通过采用热重分析仪（TG）、红外快速热解反应器考察升温速率对等比例混合的长焰煤和糠醛渣共热解产物分布的影响以及二者之间的协同效应。TG结果表明在300~600 ℃的热解区间内糠醛渣中纤维素与长焰煤热解产生的含碳有机组分发生交互作用。Kissinger-Akahira-Sunose（KAS）和Flynn-Wall-Ozawa （FWO）法计算的活化能分别在69.80~256.04 kJ/mol和71.24~253.43 kJ/mol之间;在升温速率20、30和40 ℃/min时,平均指前因子分别为2.55×1011/s（KAS）和4.22×1011/s（FWO）。糠醛渣和长焰煤红外快速共热解实验结果表明：当升温速率从10 ℃/s提高到30 ℃/s时,焦油产率先从8.67%增加到9.24%,随后又降低到8.30%,水产率从15.92%降低到14.73%又增到15.26%,气体产率从25.12%增加到26.66%而半焦从50.29%下降到49.78%。模拟蒸馏结果也表明焦油成分中轻质组分含量约为70%,重质组分相对较少,表明红外快速加热下糠醛渣与长焰煤的共热解有助于焦油提质,产生正协同作用。
Abstract
The co-pyrolysis characteristics of furfural residue and low-rank long-flame coal were systematically investigated. Using thermogravimetric analyzer （TG） and infrared fast pyrolysis reactor, the effect of heating rate on the co-pyrolysis product distribution of furfural residue and long-flame coal and the synergistic effect between them were researched. TG results show that the interaction between cellulose in furfural residue and carbon-containing organic components produced by pyrolysis of long flame coal occurs in the pyrolysis range of 300~600 °C. The activation energies calculated by KAS and FWO are 69.80~256.04 kJ/mol and 71.24~253.43 kJ/mol, respectively. At 20, 30 and 40 °C/min, the average pre-exponential factor is 1.53×1013/min （KAS） and 2.53×1013/min（FWO）. The co-pyrolysis results show that： when the heating rate increases from 10 °C/s to 30 °C/s, the tar yield first increases from 8.67% to 9.24%, then decreases to 8.3%, the water yield decreases from 15.92% to 14.73% and then increases to 15.26%, the gas yield increases from 25.12% to 26.66% and the char yield decreases from 50.29% to 49.78%. Simulated distillation results suggest that the content of light components in tar is approximately 70%, while the proportion of heavy components is relatively small, due to the fact that the co-pyrolysis of furfural residue and long flame coal under rapid infrared heating is advantageous for tar upgrading and generates positive synergy.
关键词
生物质 /
长焰煤 /
共热解 /
焦油 /
糠醛渣 /
热解特性 /
红外加热
Key words
biomass /
long flame coal /
co-pyrolysis /
tar /
furfural residue /
pyrolysis characteristics /
infrared heating
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] ZHA Z T, GE Z F, MA Y N, et al.Reactivity and kinetics of furfural residue air gasification based on-line gas releasing behaviors in a bubbling fluidized bed[J]. Combustion and flame, 2022, 237: 111871.
[2] LIU Y, SONG Y M, RAN C M, et al.Characterization and analysis of condensates and non-condensable gases from furfural residue via fast pyrolysis in a bubbling fluidized bed reactor[J]. Waste management, 2021, 125: 77-86.
[3] FANG S Q, WANG X R, LI P, et al.Effects of potassium salt on the pyrolysis products characteristics of alkali lignin from furfural residue[J]. Fuel, 2023, 333: 126216.
[4] LIU C L, LIANG L L, HAN X L, et al.Optimized preparation of activated carbon from furfural residue using response surface methodology and its application for bisphenol S adsorption[J]. Water science and technology: a journal of the International Association on Water Pollution Research, 2022, 85(3): 811-826.
[5] LIU Y, SONG Y M, RAN C M, et al.Pyrolysis of furfural residue in a bubbling fluidized bed reactor: biochar characterization and analysis[J]. Energy, 2020, 211: 118966.
[6] INKOUA S, LI C, FAN H L, et al.Pyrolysis of furfural residues: property and applications of the biochar[J]. Journal of environmental management, 2022, 316: 115324.
[7] XUE S Z, SUN Q, GENG J S, et al.Acoustic emission (AE)-based study on low-temperature pyrolysis characteristics of long flame coal[J]. Journal of analytical and applied pyrolysis, 2022, 167: 105639.
[8] YANG Y, CHEN Y, XUANYU J.The characteristics and kinetics of co-pyrolysis of furfural residue with oil shale semi-coke[J]. Oil shale, 2021, 38(1): 26.
[9] LIN Y K, LI Q S, LI X F, et al.Pyrolysates distribution and kinetics of Shenmu long flame coal[J]. Energy conversion & management, 2014, 86:428-434.
[10] SONCINI R M, MEANS N C, WEILAND N T.Co-pyrolysis of low rank coals and biomass: product distributions[J]. Fuel, 2013, 112: 74-82.
[11] WU Z Q, ZHANG J, FAN Y J, et al.Synergistic effects from co-pyrolysis of lignocellulosic biomass with low-rank coal: a perspective based on the interaction of organic components[J]. Fuel, 2021, 306: 121648.
[12] FAN Y J, YANG B L, ZHANG B, et al.Synergistic effects from fast co-pyrolysis of lignin with low-rank coal: on-line analysis of products distribution and fractal analysis on co-pyrolysis char[J]. Journal of the energy institute, 2021, 97: 152-160.
[13] 李晨浩, 田宜水, 胡二峰, 等. 厌氧消化残渣与低阶长焰煤共热解特性[J]. 农业工程学报, 2022, 38(23): 188-194.
LI C H, TIAN Y S, HU E F, et al.Co-pyrolysis behavior and pyrolysis characteristics of anaerobic digestion residues and low-rank long-flame coal[J]. Transactions of the Chinese Society of Agricultural Engineering, 2022, 38(23): 188-194.
[14] TANG X J, CHEN Z H, LIU J Y, et al.Dynamic pyrolysis behaviors, products, and mechanisms of waste rubber and polyurethane bicycle tires[J]. Journal of hazardous materials, 2021, 402: 123516.
[15] 李沫杉, 田宜水, 胡二峰, 等. 沼渣热解动力学、热力学分析及热解产物特性研究[J]. 太阳能学报, 2022, 43(6): 226-233.
LI M S, TIAN Y S, HU E F, et al.Pyrolysis kinetics and thermodynamic analysis of biogas residue and its pyrolysis product characteristics research[J]. Acta energiae solaris sinica, 2022, 43(6): 226-233.
[16] MKHIZE N M, VAN DER GRYP P, DANON B, et al. Effect of temperature and heating rate on limonene production from waste tyre pyrolysis[J]. Journal of analytical and applied pyrolysis, 2016, 120: 314-320.
[17] AYLÓN E, CALLÉN M S, LÓPEZ J M, et al. Assessment of tire devolatilization kinetics[J]. Journal of analytical and applied pyrolysis, 2005, 74(1/2): 259-264.
[18] CHAVANDO J A M, DE MATOS E C J, SILVA V B, et al. Pyrolysis characteristics of RDF and HPDE blends with biomass[J]. International journal of hydrogen energy, 2022, 47(45): 19901-19915.
[19] WANG H, HU H Y, YANG Y H, et al.Effect of high heating rates on products distribution and sulfur transformation during the pyrolysis of waste tires[J]. Waste management, 2020, 118: 9-17.
[20] LI M S, LU Y Y, HU E F, et al.Fast co-pyrolysis characteristics of high-alkali coal and polyethylene using infrared rapid heating[J]. Energy, 2023, 266: 126635.
[21] REN Q Q, ZHANG J L, HU S, et al.Novel photothermal pyrolysis on waste tire to generate high-yield limonene[J]. Fuel, 2022, 329: 125482.
[22] TANG C Y, YANG L, LI X C, et al.Characteristics of small molecule compounds produced from the co-pyrolysis of cotton stalk and coal[J]. BioResources, 2021, 16(1): 1469-1481.
基金
国家自然科学基金（52104245）; 重庆自然科学基金（cstc2021jcyj-msxmX0099）; 重庆市科技局项目（2021XM3073; 2019LY41）
PDF(1431 KB)
