TG-FTIR study on escape behavior of products from co-pyrolysis of coal and residuum

ZHOU Xiaodong; WU Hao; LIU Jingmei; HUANG Xueli; LIU Ting; ZHONG Mei; MA Fengyun

doi:10.1016/S1872-5813(23)60393-7

Volume 52 Issue 4

Apr. 2024

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Article Navigation > Journal of Fuel Chemistry and Technology > 2024 > 52(4): 525-535

ZHOU Xiaodong, WU Hao, LIU Jingmei, HUANG Xueli, LIU Ting, ZHONG Mei, MA Fengyun. TG-FTIR study on escape behavior of products from co-pyrolysis of coal and residuum[J]. Journal of Fuel Chemistry and Technology, 2024, 52(4): 525-535. doi: 10.1016/S1872-5813(23)60393-7

Citation:

ZHOU Xiaodong, WU Hao, LIU Jingmei, HUANG Xueli, LIU Ting, ZHONG Mei, MA Fengyun. TG-FTIR study on escape behavior of products from co-pyrolysis of coal and residuum[J]. Journal of Fuel Chemistry and Technology, 2024, 52(4): 525-535. doi: 10.1016/S1872-5813(23)60393-7

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TG-FTIR study on escape behavior of products from co-pyrolysis of coal and residuum

doi: 10.1016/S1872-5813(23)60393-7

ZHOU Xiaodong^1
,,
WU Hao^2
,,
LIU Jingmei^{1
,
,},
HUANG Xueli^2
,,
LIU Ting^1
,,
ZHONG Mei^{2
,
,},
MA Fengyun^2
,

1.
College of Chemistry, Xinjiang University, State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources, Xinjiang University, Urumqi 830017, China
2.
Xinjiang Key Laboratory of Coal Clean Conversion & Chemical Engineering Process, School of Chemical Engineering and Technology, Xinjiang University, Urumqi 830017, China

Funds: The project was supported by the Special Project for State Key Laboratory of Chemistry and Utilization of Carbon-Based Energy Resources, National Natural Science Foundation of China (22279110), and Special Fund Project for the Local Development of Science and Technology Guiding by the Central Government.

Received Date: 2023-07-25
Accepted Date: 2023-10-04
Rev Recd Date: 2023-09-30

Available Online: 2023-11-10

Publish Date: 2024-04-03

Abstract

Abstract

Coal and residuum are first co-pyrolyzed, and then hydrogenated into small molecule products during co-liquefaction. Therefore, clarifying influence of residuum on coal pyrolysis performance is an important thermochemical basis for regulating the process. The co-pyrolysis behavior of atmospheric residuum (AR) and Naomaohu coal (NMH) were investigated by TG, TG-FTIR and distributed activation energy model. The results showed that the peak temperature of the maximum rate of weight loss for the co-pyrolysis process was reduced by 7 °C compared with the theoretical value calculated by weighted average of AR and NMH pyrolysis alone, while the weight loss increased by 3%, the average activation energy decreased by 23.6 kJ/mol. In addition, the peak area of alkyl O-containing functional groups such as alcohols and ethers increased, whereas those of CO and CO₂ decreased, suggesting that AR had a positive effect on NMH pyrolysis. Meanwhile, alkyl radicals from AR decomposition would combine with O-containing radicals generated from coal pyrolysis, thus resulting in a decrease of CO and CO₂ by inhibiting breakage of carboxyl groups. This work will provide a scientific evaluation basis for revealing the influence of residuum on composition of coal liquefaction product during co-liquefaction.
- Tahe residuum,
- Naomaohu coal,
- co-pyrolysis,
- O-containing functional groups,
- promotion effect

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References(38)

References

[1]	孙磊. 煤与重油共液化及其协同效应研究[D]. 马鞍山: 安徽工业大学, 2021. SUN Lei. Study on co-liquefaction of oil and coal by hydrogenation and its synergistic effects[D]. Ma'anshan: Anhui University of Technology, 2021.
[2]	ALI M F, AHMED S, QURESHI M S. Catalytic coprocessing of coal and petroleum residues with waste plastics to produce transportation fuels[J]. Fuel Process Technol,2011,92(5):1109−1120. doi: 10.1016/j.fuproc.2011.01.006
[3]	贾梦婷, 高山松, 张彦军, 等. 哈密煤与塔河重油共加氢反应性能的研究[J]. 燃料化学学报,2021,49(7):902−908. doi: 10.1016/S1872-5813(21)60037-3 JIA Mengting, GAO Shansong, ZHANG Yanjun, et al. Co-hydrogenation behavior of Hami coal with Tahe residue[J]. J Fuel Chem Technol,2021,49(7):902−908. doi: 10.1016/S1872-5813(21)60037-3
[4]	MALHOTRA R, MCMILLEN D F. Relevance of cleavage of strong bonds in coal liquefaction[J]. Energy Fuels,1993,7(2):227−233. doi: 10.1021/ef00038a012
[5]	WU Z Q, WANG S Z, ZHAO J, et al. Synergistic effect on thermal behavior during co-pyrolysis of lignocellulosic biomass model components blend with bituminous coal[J]. Bioresour Technol,2014,169:220−228. doi: 10.1016/j.biortech.2014.06.105
[6]	LI K, MA X X, HE R Y, et al. Co-pyrolysis characteristics and interaction route between low-rank coals and Shenhua coal direct liquefaction residue[J]. Chin J Chem Eng,2019,27(11):2815−2824. doi: 10.1016/j.cjche.2019.03.032
[7]	QUAN C, XU S P, AN Y, et al. Co-pyrolysis of biomass and coal blend by TG and in a free fall reactor[J]. J Thermal Anal Calorim,2014,117(2):817−823. doi: 10.1007/s10973-014-3774-7
[8]	袁泉, 张乾, 梁丽彤, 等. 煤与催化裂化油浆共热解特性及气体逸出规律[J]. 煤炭学报,2021,46(8):2690−2698. doi: 10.13225/j.cnki.jccs.2020.0615 YUAN Quan, ZHANG Qian, LIANG Litong, et al. Characteristics of co-pyrolysis of coal and FCC slurry and the evolution behavior of the produced gases[J]. J China Coal Soc,2021,46(8):2690−2698. doi: 10.13225/j.cnki.jccs.2020.0615
[9]	OVALLES C, ROGEL E, HAJDU P, et al. Predicting coke morphology in Delayed Coking from feed characteristics[J]. Fuel,2020,263:116739. doi: 10.1016/j.fuel.2019.116739
[10]	PRAJAPATI R, KOHLI K, MAITY S K. Residue upgradation with slurry phase catalyst: Effect of feedstock properties[J]. Fuel,2019,239:452−460. doi: 10.1016/j.fuel.2018.11.041
[11]	MENG H Y, WANG S Z, CHEN L, et al. Investigation on synergistic effects and char morphology during co-pyrolysis of poly(vinyl chloride) blended with different rank coals from northern China[J]. Energy Fuels,2015,29(10):6645−6655. doi: 10.1021/acs.energyfuels.5b01437
[12]	SONG Y H, YIN N, YAO D, et al. Co-pyrolysis characteristics and synergistic mechanism of low-rank coal and direct liquefaction residue[J]. Energy Sources, Part A,2019,41(21):2675−2689. doi: 10.1080/15567036.2019.1568639
[13]	SONG Y H, LEI S M, LI J C, et al. In situ FTIR analysis of coke formation mechanism during co-pyrolysis of low-rank coal and direct coal liquefaction residue[J]. Renewable Energy,2021,179:2048−2062. doi: 10.1016/j.renene.2021.08.030
[14]	WU Z Q, YANG W C, LI Y W, et al. Co-pyrolysis behavior of microalgae biomass and low-quality coal: Products distributions, char-surface morphology, and synergistic effects[J]. Bioresour Technol,2018,255:238−245. doi: 10.1016/j.biortech.2018.01.141
[15]	何清, 程晨, 龚岩, 等. 水热炭化生物质与煤共热解和共气化特性研究[J]. 燃料化学学报,2022,50(6):665−673. HE Qing, CHENG Chen, GONG Yan, et al. Study on co-pyrolysis and co-gasification of hydrothermal carbonized biomass and coal[J]. J Fuel Chem Technol,2022,50(6):665−673.
[16]	张婷婷, 白宗庆, 侯冉冉, 等. 煤与废塑料共热解特性研究进展[J]. 化工进展,2021,40(5):2461−2470. ZHANG Tingting, BAI Zongqing, HOU Ranran, et al. Research progress on co-pyrolysis characteristics of coal and waste plastics[J]. Chem Ind Eng Progress,2021,40(5):2461−2470.
[17]	LU Y, WANG Y, ZHANG J, et al. Investigation on the characteristics of pyrolysates during co-pyrolysis of Zhundong coal and Changji oil shale and its kinetics[J]. Energy,2020,200:117529. doi: 10.1016/j.energy.2020.117529
[18]	GUO F Q, LI X L, WANG Y, et al. Characterization of Zhundong lignite and biomass co-pyrolysis in a thermogravimetric analyzer and a fixed bed reactor[J]. Energy,2017,141:2154−2163. doi: 10.1016/j.energy.2017.11.141
[19]	LI S D, CHEN X L, LIU A, et al. Co-pyrolysis characteristic of biomass and bituminous coal[J]. Bioresour Technol,2015,179:414−420. doi: 10.1016/j.biortech.2014.12.025
[20]	孙云娟. 生物质与煤共热解气化行为特性及动力学研究[D]. 北京: 中国林业科学研究院, 2013. SUN Yunjuan. Study on the characteristic and kinetic of biomass and coal co-pyrolysis[D]. Beijing: Chinese Academy of Forestry, 2013.
[21]	GYUL’MALIEV A M, GOLOVIN G S, GAGARIN S G. Classification of fossil fuels according to structural-chemical characteristics[J]. Solid Fuel Chem,2007,41(5):257−266. doi: 10.3103/S0361521907050011
[22]	孙志强. 基于煤化学结构指数法对新疆煤液化性能评价与西沟煤/渣油共液化强化研究[D]. 乌鲁木齐: 新疆大学, 2017. SUN Zhiqiang. Evaluation of Xinjiang low rank coal direct liquefaction based on coal chemistry structural index and improvement of the performance for co-liquefaction of Xigou coal and residue[D]. Urumqi: Xinjiang University, 2017.
[23]	煤炭科学技术研究院有限公司. 煤油共炼原料技术条件[S]. 2018. Coal Science and Technology Research Institute Co. , Ltd. Technical conditions for coal oil co refining raw materials[S]. 2018.
[24]	LI S S, MA X Q, LIU G C, et al. A TG-FTIR investigation to the co-pyrolysis of oil shale with coal[J]. J Anal Appl Pyrolysis,2016,120:540−548. doi: 10.1016/j.jaap.2016.07.009
[25]	陈海翔, 刘乃安. 温度积分近似式研究[J]. 化学进展,2008,20(7/8):1015−1020. CHEN Haixiang, LIU Nai’an. Approximation Expressions for the Temperature Integral[J]. Prog Chem,2008,20(7/8):1015−1020.
[26]	MA Y Y, MA F Y, MO W L, et al. Five-stage sequential extraction of Hefeng coal and direct liquefaction performance of the extraction residue[J]. Fuel,2020,266(16):117039.
[27]	HOU R R, PANG K L, BAI Z Q, et al. Study on carboxyl groups in direct liquefaction of lignite: Conjoint analysis of theoretical calculations and experimental methods[J]. Fuel,2021,286:119298. doi: 10.1016/j.fuel.2020.119298
[28]	LIU Q, WANG S R, ZHENG Y, et al. Mechanism study of wood lignin pyrolysis by using TG-FTIR analysis[J]. J Anal Appl Pyrolysis,2008,82(1):170−177. doi: 10.1016/j.jaap.2008.03.007
[29]	LIN X C, WANG C H, IDETA K, et al. Insights into the functional group transformation of a Chinese brown coal during slow pyrolysis by combining various experiments[J]. Fuel,2014,118:257−264. doi: 10.1016/j.fuel.2013.10.081
[30]	陈泽洲. 煤加氢液化催化剂及相关条件下烃组分的反应研究[D]. 北京: 北京化工大学, 2018. CHEN Zezhou. Study on the reactions of catalysts and hydrocarbons in coal hydroliquefaction[D]. Beijing: Beijing University of Chemical Technology, 2018.
[31]	何小强, 莫文龙, 王强, 等. 离子液体溶胀对煤直接液化残渣结构及热解性能的影响[J]. 燃料化学学报,2019,47(12):1417−1428. HE Xiaoqiang, MO Wenlong, WANG Qiang, et al. Effect of swelling treatment by ionic liquid on the structure and pyrolysis performance of the direct coal liquefaction residue[J]. J Fuel Chem Technol,2019,47(12):1417−1428.
[32]	鲁阳. 准东煤与昌吉油页岩混合燃料热解/燃烧特性及其动力学研究[D]. 太原: 太原理工大学, 2020. LU Yang. Research on pyrolysis and combustion characteristics of Zhundong coal and Changji oil shale mixtures and their kinetics[D]. Taiyuan: Taiyuan University of Technology, 2020.
[33]	WANG Y G, ZHOU J L, BAI L, et al. Impacts of inherent O-containing functional groups on the surface properties of Shengli lignite[J]. Energy Fuels,2014,28(2):862−867. doi: 10.1021/ef402004j
[34]	GIROUX L, CHARLAND J P, MACPHEE J A. Application of thermogravimetric Fourier transform infrared spectroscopy (TG-FTIR) to the analysis of oxygen functional groups in coal[J]. Energy Fuels,2006,20(5):1988−1996. doi: 10.1021/ef0600917
[35]	SCACCIA S. TG-FTIR and kinetics of devolatilization of Sulcis coal[J]. J Analy Appl Pyrolysis,2013,104:95−102. doi: 10.1016/j.jaap.2013.09.002
[36]	FENG X B, CAO J P, ZHAO X Y, et al. Organic oxygen transformation during pyrolysis of Baiyinhua lignite[J]. J Anal Appl Pyrolysis,2016,117:106−115. doi: 10.1016/j.jaap.2015.12.010
[37]	杨伏生. 基于TG-MS方法的核桃壳/神府煤的凹凸棒土催化共热解动力学及机理研究[D]. 西安: 西安科技大学, 2019. YANG Fusheng. Kinetics and mechanism of copyrolysis of walnut shell and Shenfu coal using attapulgite as catalyst based on TG-MS method[D]. Xi’an: Xi’an University of Science and Technology, 2019.
[38]	CHEN X, LIU L, ZHANG L, et al. Thermogravimetric analysis and kinetics of the co-pyrolysis of coal blends with corn stalks[J]. Thermochim Acta,2018,659:59−65. doi: 10.1016/j.tca.2017.11.005