STUDY ON CHEMICAL STRUCTURE EVOLUTION AND REACTIVE MECHANISM OF BIOMASS CHAR PREPARED IN CO<sub>2</sub>/H<sub>2</sub>O ATMOSPHERE

LIU Liang; LI Wenhao; LIU Zenghui; QING Mengxia; ZHAO Guangmin; LIU Wenbin

doi:10.13205/j.hjgc.202304015

Volume 41 Issue 4

Apr. 2023

Turn off MathJax

Article Contents

Abstract

References

Article Navigation > ENVIRONMENTAL ENGINEERING > 2023 > 41(4): 108-115

LIU Liang, LI Wenhao, LIU Zenghui, QING Mengxia, ZHAO Guangmin, LIU Wenbin. STUDY ON CHEMICAL STRUCTURE EVOLUTION AND REACTIVE MECHANISM OF BIOMASS CHAR PREPARED IN CO2/H2O ATMOSPHERE[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(4): 108-115. doi: 10.13205/j.hjgc.202304015

Citation:

LIU Liang, LI Wenhao, LIU Zenghui, QING Mengxia, ZHAO Guangmin, LIU Wenbin. STUDY ON CHEMICAL STRUCTURE EVOLUTION AND REACTIVE MECHANISM OF BIOMASS CHAR PREPARED IN CO₂/H₂O ATMOSPHERE[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(4): 108-115. doi: 10.13205/j.hjgc.202304015

Citation:

PDF( 5787 KB)

STUDY ON CHEMICAL STRUCTURE EVOLUTION AND REACTIVE MECHANISM OF BIOMASS CHAR PREPARED IN CO₂/H₂O ATMOSPHERE

doi: 10.13205/j.hjgc.202304015

1. School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha 410114, China;
2. Key Laboratory of Renewable Energy Electric-Technology of Hunan Province, Changsha 410114, China

Received Date: 2022-08-30
Available Online: 2023-05-26
Publish Date: 2023-04-01

Abstract

Abstract

With rice straw(RS) as the research object, the effects of CO₂/H₂O atmosphere on biomass yield, structure and reactivity of RS in the process of volatilization were investigated. Fourier transform infrared spectroscopy (FTIR)and Raman spectroscopy (Raman) were used to characterize the RS char, and the evolution law of the microchemical structure of RS char under different reaction atmospheres was investigated. The combustion reactivity of RS char was analyzed by a thermogravimetric analyzer (TGA), and the effects of CO₂ atmosphere, H₂O atmosphere and CO₂/H₂O mixture atmosphere on the microstructure evolution and reaction mechanism of RS char were revealed. The results showed that the yield of biomass char decreased with the increase of final reaction temperature in CO₂/H₂O atmosphere, and the difference of yield of biomass char was obvious when the reaction temperature was above 700 ℃. CO₂/H₂O mixture atmosphere was more conducive to the consumption and condensation of the small aromatic ring system of biomass char. CO₂ atmosphere and H₂O atmosphere had a synergistic effect and competitive relation in the reaction of biomass char at high temperature. CO₂/H₂O atmosphere could improve the combustion characteristics of biomass char when the char-making temperature was 700 ℃ above.
- rice straw,
- oxy-fuel combustion,
- biomass char,
- chemical structure,
- reactivity

FullText(HTML)

References(34)

References

[1]	中华人民共和国国家统计局. 中国统计年鉴[M]. 北京:中国统计出版社,2020.
[2]	刘桐利,赵立欣,孟海波,等. 秸秆能源化利用技术评价方法探究与优化[J]. 环境工程,2020, 38(8):195-200.
[3]	MONIKA K G, ADAM L, AGNIESZKA K. Pollutant emissions during oxy-fuel combustion of biomass in a bench scale CFB combustor[J]. Energies, 2022, 15(3):706.
[4]	PAULINA W, AGNIESZKA K, ANDRZEJ S, et al. Thermogravimetric and kinetic study of thermal degradation of various types of municipal solid waste (MSW) under N₂, CO₂ and oxy-fuel conditions[J]. Energy, 2022, 248:123573.
[5]	SUN L T, SUN R, YAN Y H, et al. Investigation of air-MILD and oxy-MILD combustion characteristics of semicoke and bituminous coal mixtures in a 0.3 MW fuel-rich/lean fired furnace[J]. Fuel Processing Technology, 2022, 231:107247.
[6]	LEE W S, KANG J H, LEE J C, et al. Enhancement of energy efficiency by exhaust gas recirculation with oxygen-rich combustion in a natural gas combined cycle with a carbon capture process[J]. Energy, 2020, 200:117586.
[7]	胡华军,黄亚继,曹健华,等. 烟气中CO₂/O₂气氛对稻壳流化床热解制炭的影响规律[J]. 环境工程,2021, 39(1):117-122.
[8]	SHAN F P, LIN Q Z, ZHOU K, et al. An experimental study of ignition and combustion of single biomass pellets in air and oxy-fuel[J]. Fuel, 2017, 188:277-284.
[9]	KARLSTROM O, HUPA L. Energy conversion of biomass char: oxidation rates in mixtures of O₂/CO₂/H₂O[J]. Energy, 2019, 181:615-624.
[10]	HUANG Z M, ZHANG J S, ZHAO Y, et al. Kinetic studies of char gasification by steam and CO₂ in the presence of H₂ and CO[J]. Fuel Processing Technology, 2010, 91(8):843-847.
[11]	戴晓虎,陈淑娴,蔡辰,等. 秸秆主流能源化技术研究与经济性分析[J]. 环境工程,2021, 39(1):1-17.
[12]	GUIZANI C, ESCUDERO SANZ F J, SALVADOR S. The gasification reactivity of high-heating-rate chars in single and mixed atmospheres of H₂O and CO₂[J]. Fuel, 2013, 108:812-823.
[13]	BAI Y H, WANG Y L, ZHU S H, et al. Synergistic effect between CO₂ and H₂O on reactivity during coal chars gasification[J]. Fuel, 2014, 126:1-7.
[14]	QUISPE I, NAVIA R, KAHHAT R, et al. Energy potential from rice husk through direct combustion and fast pyrolysis: a review[J]. Waste Management, 2017, 59:200-210.
[15]	BAI Y H, LV P, YANG X H, et al. Gasification of coal char in H₂O/CO₂ atmospheres: evolution of surface morphology and pore structure[J]. Fuel, 2018, 218:236-246.
[16]	ZHANG G Z, LIU H,WANG J, et al. Catalytic gasification characteristics of rice husk with calcined dolomite[J]. Energy, 2018, 165:1173-1177.
[17]	RHOFITA E I, RACHMAT R, MEYER M, et al. Mapping analysis of biomass residue valorization as the future green energy generation in Indonesia[J]. Journal of Cleaner Production, 2022, 354:131667.
[18]	XU G Y, CAI X H, WANG L, et al. Thermogravimetric-infrared analysis and performance optimization of co-pyrolysis of oily sludge and rice husks[J]. International Journal of Hydrogen Energy, 2022, 47(64):27437-27451.
[19]	LI X M, GONG X, ZHANG C X, et al. Occurrence characteristics of ash-forming elements in sea rice waste and their effects on particulate matter emission during combustion[J]. Fuel, 2020, 273:117769.
[20]	SCHNEIDER C, ZELLER M, BÖHM D, et al. Influence of pressure on the gasification kinetics of two high-temperature beech wood chars with CO₂, H₂O and its mixture[J]. Fuel, 2021, 299:120523.
[21]	DENG L H, ZHANG W D, SUN S Z, et al. Effect of pressure on the structure and reactivity of demineralized coal during O₂/H₂O thermal conversion process[J]. Energy, 2022, 244:122632.
[22]	刘晓倩,刘银河,吕强,等. 准东煤在O₂/H₂O/CO₂气氛下脱挥发分过程焦炭结构演化特性研究[J]. 热力发电,2022,51(1):139-149.
[23]	TONG W, CAI Z L, LIU Q C, et al. Evaluation of biochar combustion reactivity under pyrolysis temperature: microstructure characterization, kinetics and thermodynamics[J]. Journal of the Energy Institute, 2020, 93(5):1914-1923.
[24]	邱朋华,杜昌帅,刘栗,等. 热解酸洗煤焦结构特性以及与其反应性关系研究[J]. 煤炭学报,2017,42(增刊1):233-239.
[25]	葛涛,李洋,WANG M,等. 山西高硫气肥煤结构表征与分子模型构建[J]. 光谱学与光谱分析,2020, 40(11):3373-3378.
[26]	冯浩,左彩彪,王秉飞,等. 不同升温速率下混矸煤燃烧特性分析[J]. 能源与节能,2018(4):20-22.
[27]	盛晨绪,姚宗路,赵立欣,等. 棉秆炭与生物质焦油混合成型及燃烧特性研究[J]. 太阳能学报,2022,43(7):458-464.
[28]	张泽,赵洪君,孟洁,等. 生物质的热解及生物油提质的研究进展[J]. 环境工程,2021, 39(3):161-171.
[29]	张殿凯,李艳红,常丽萍,等. 弥勒褐煤结构特征及其分子模型构建[J]. 燃料化学学报,2021, 49(6):727-734.
[30]	王佳怡,范垂钢,李松庚. 碳氧官能团对煤焦低温还原NO的影响[J]. 化工学报,2022, 73(5):2140-2148.
[31]	CHEN C, WANG J, LIU W, et al. Effect of pyrolysis conditions on the char gasification with mixtures of CO₂ and H₂O[J]. Proceedings of the Combustion Institute, 2013, 34(2):2453-2460.
[32]	WANG Y, BELL D A. Competition between H₂O and CO₂ during the gasification of Powder River Basin coal[J].Fuel,2017,187:94-102.
[33]	LIU Y R, PASKEVICIUS M, SOFIANOS M V, et al. A SAXS study of the pore structure evolution in biochar during gasification in H₂O, CO₂ and H₂O/CO₂[J]. Fuel, 2021, 292:120384.
[34]	LIU S S, WU G, SYED S A, et al. Catalytic pyrolysis of pine wood over char-supported Fe: bio-oil upgrading and catalyst regeneration by CO₂/H₂O[J]. Fuel, 2022, 307:121778.