Abstract:Through low-rank coal upgrading and transformation technologies such as pyrolysis, gasification, and liquefaction, abundant low-rank coal such as lignite can be used to prepare high value-added chemical products and high-quality energy. Computational chemistry methods plays an important role in exploring the mechanism and optimizing the process of low-rank coal conversion technology. The current research status about the mechanism of low-rank coal upgrading and transformation were summarized. And the application of computational chemistry such as molecular dynamics simulation and density functional theory calculation in the study of low-rank coal transformation mechanism were reviewed. Feasible optimization directions of computational chemistry methods in exploring the mechanism of low-rank coal transformation were proposed.
白蛟宣,鲁 婷,李光跃. 低阶煤转化机理及计算化学方法在探究中的应用[J]. 煤炭与化工, 2024, 47(2): 143-148,156..
Bai Jiaoxuan, Lu Ting, Li Guangyue. The conversion mechanism of low-rank coal and the application of computational chemistry methods in exploration. CCI, 2024, 47(2): 143-148,156..
[ 1 ] ZHENG M, LI X X, WANG M J, et al. Dynamic profiles of tar pr-
oducts during Naomaohu coal pyrolysis revealed by large-scale reactive molecular dynamic simulation [ J ]. Fuel, 2019( 253 ): 910 - 920.
[ 2 ] HUANG Z B, ZHOU W J, WEI J J. Study on the molecular struct-
ure model of tar-rich coal and its pyrolysis process[ J ]. Journal of Molecular Structure, 2023(1 286): 135 - 613.
[ 3 ] LI Z K, WEI X Y, YAN H L, et al. Advances in lignite extractionand conversion under mild conditions [ J ]. Energy & Fuels, 2015, 29( 11 ): 6 869 - 6 886.
[ 4 ] 战星羽. 低煤阶煤热解生烃及其分子动力学研究[ D ].徐州: 中国矿业大学,2023.
[ 5 ] 郑 默,李晓霞. ReaxFF MD模拟揭示的煤热解挥发分自由基反应的竞争与协调[ J ]. 化工学报,2022,73( 6 ):2 732 - 2 741.
[ 6 ] 陶 超. 基于大分子结构的准东煤ReaxFF-MD热解特性研究[ D ]. 徐州:中国矿业大学,2023.
[ 7 ] CHEN B, DIAO Z J, LU H Y. Using the ReaxFF reactive force fie-
ld for molecular dynamics simulations of the spontaneous combus-
tion of lignite with the Hatcher lignite model[ J ]. Fuel, 2014( 116 ): 7 - 13.
[ 8 ] XIN H H, ZHOU B H, TIAN W J, et al. Pyrolytic stage evolution mechanism of Zhundong coal based on reaction consistency analysis of mono/multi molecular models[ J ]. Fuel, 2023( 333 ): 126 - 371.
[ 9 ] 李 勇. 酸/碱催化剂对新疆淖毛湖煤热解挥发分转化行为的研究 [ D ].太原: 太原理工大学,2023.
[ 10 ] WU D, ZHANG W Y. Evolution mechanism of macromolecular st-
ructure in coal during heat treatment: based on FTIR and XRD in situ analysis techniques[ J ]. Journal of Spectroscopy, 2019( 19 ): 1 - 18.
[ 11 ] LIU T, GUO Q, CHANG G. Enhancement of low-temperature lig-
nite pyrolysis by recycled carbocoal for high-quality tar in fixed-
bed reactor [ J ]. The Canadian Journal of Chemical Engineering, 2019, 97( 6 ): 1 792 - 1 802.
[ 12 ] QIN T, LU Q X, XIANG H, et al. Ca promoted Ni-Co bimetallic catalyzed coal pyrolysis and char steam gasification[ J ]. Energy, 2023( 282 ): 128 - 374.
[ 13 ] DAI F, ZHANG S P, LUO Y P, et al. Recent progress on Hydroge-
n-rich syngas production from coal gasification[ J ]. Processes, 2023, 11( 6 ): 17 - 65.
[ 14 ] 吕俊鑫. 新疆富铁低阶煤气化过程中的矿物转化及结渣特性研究 [ D ]. 徐州:中国矿业大学(北京),2022.
[ 15 ] YIN Z Y, XU H, CHEN Y P, et al. Experimental simulate on hyd-
rogen production of different coals in underground coal gasification[ J ]. International Journal of Hydrogen Energy, 2023, 48( 19 ): 6 975 - 6 985.
[ 16 ] WANG W Z, ZHAO Q Y, LU B R, et al. Pure hydrogen gas prod-
uction in a coal supercritical water gasification system with CO2 as transporting medium[ J ]. Applied Thermal Engineering, 2024( 237 ): 121 - 529.
[ 17 ] MENG F R, LI X C, LIANG H Z, et al. Non-thermal plasma degr-
adation of tar in gasification syngas [ J ]. Chemical Engineering and Processing - Process Intensification, 2019( 145 ): 107 - 656.
[ 18 ] LEI Z P, LIU M X, SHUI H F, et al. Study on the liquefaction of Shengli lignite with NaOH/methanol [ J ]. Fuel Processing Technology, 2010, 91( 7 ): 783 - 788.
[ 19 ] LI H, PENG W, GU J, et al. Study on liquefaction characteristics of lignite in CO atmosphere[ J ]. Journal of Analytical and Applied Pyrolysis, 2023( 172 ): 105 - 995.
[ 20 ] BATALHA N, CHECA R, LORENTZ C, et al. Lignite and biomass waste hydrothermal liquefaction crude upgrading by hydrotreatment[ J ]. Energy & Fuels, 2023, 37( 14 ): 10 506 - 10 520.
[ 21 ] QIN X Z, SHEN T, PAN Y, et al. Condensation of residue during
direct liquefaction of a high-vitrinite coal[ J ]. Fuel, 2024( 357 ): 129 -721.
[ 22 ] LIU M X, LEI Z P, GAO L J, et al. Hydro-liquefaction of the ash-
less coal from de-polymerization of Shengli lignite[ J ]. Fuel, 2023( 349 ): 128 - 653.
[ 23 ] GAO Z Y, BAI X, FAN X, et al. Mass spectrometric evaluation of the catalytic deoxygenation of soluble organic matter in xiaolongtan lignite[ J ]. Chemistry Letters, 2023, 52( 7 ): 528 - 532.
[ 24 ] LI Y Y, LI G Y, ZHANG H, et al. ReaxFF study on nitrogen-tran-
sfer mechanism in the oxidation process of lignite[ J ]. Fuel, 2017( 193 ): 331 - 342.
[ 25 ] ALAREEQI S, BAHAMON D, POLYCHRONOPOULOU K, et al. Insights into the thermal stability and conversion of carbon-based materials by using ReaxFF reactive force field: Recent advances and future directions [ J ]. Carbon, 2022( 196 ): 840 - 866.
[ 26 ] LU T, LI G Y, WU W Z, et al. Alkali-oxygen oxidation mechani-
sm for producing benzene carboxylic acids from lignite: Experim-
ental and molecular modelling studies[ J ]. Fuel, 2020( 280 ): 118 - 652.
[ 27 ] 秦锡壮. 中低阶煤在直接转化过程中的断键与缩聚反应研究 [ D ]. 北京:北京化工大学,2023.
[ 28 ] XU F, LIU H, WANG Q, et al. Study of non-isothermal pyrolysis mechanism of lignite using ReaxFF molecular dynamics simulations [ J ]. Fuel, 2019( 256 ): 115 - 884.
[ 29 ] BAI H C, MAO N, WANG R H, et al. Kinetic characteristics and reactive behaviors of HSW vitrinite coal pyrolysis: A comprehensive analysis based on TG-MS experiments, kinetics models and ReaxFF MD simulations[ J ]. Energy Reports, 2021( 7 ): 1 416 - 1 435.
[ 30 ] LIANG Y H, WANG F, ZHANG H, et al. A ReaxFF molecular dynamics study on the mechanism of organic sulfur transformation in the hydropyrolysis process of lignite [ J ]. Fuel Processing Technology, 2016( 147 ): 32 - 40.
[ 31 ] WANG J P, WANG Y N, LI G Y, et al. ReaxFF molecular dynamics study on nitrogen-transfer mechanism in the hydropyrolysis process of lignite [ J ]. Chemical Physics Letters, 2020( 744 ): 137 - 214.
[ 32 ] ZHANG Z J, GUO L T, ZHANG H Y, et al. Comparing product distribution and desulfurization during direct pyrolysis and hydropyrolysis of Longkou oil shale kerogen using reactive MD simulations[ J ]. International Journal of Hydrogen Energy, 2019, 44( 47 ): 25 335 - 25 346.
[ 33 ] HONG D K, CAO Z, GUO X. Effect of calcium on the secondary reactions of tar from Zhundong coal pyrolysis: A molecular dynamics simulation using ReaxFF [ J ]. Journal of Analytical and Applied Pyrolysis, 2019( 137 ): 246 - 252.
[ 34 ] WU B, GUO X, QIAN X Y, et al. Insight into the influence of calcium on the co-pyrolysis of coal and polystyrene[ J ]. Fuel, 2022( 329 ): 125 - 471.
[ 35 ] ZHANG H J, CHEN F, ZHANG J L, et al. Supercritical watergasification of fuel gas production from waste lignin: The effect mechanism of different oxidized iron-based catalysts[ J ]. Intern-
ational Journal of Hydrogen Energy, 2021, 46( 59 ): 30 288 - 30 299.
[ 36 ] DOMAZETIS G, JAMES B D, LIESEGANG J. High-level comp-
uter molecular modeling for Low-rank coal containing metal complexes and Iron-catalyzed steam gasification [ J ]. Energy & Fuels, 2008, ( 22 ): 3 994 - 4 005.
[ 37 ] LI G Y, LI A Q, ZHANG H, et al. Theoretical study of the CO formation mechanism in the CO2 gasification of lignite[ J ]. Fuel, 2018( 211 ): 353 - 362.
[ 38 ] LIU J L, MAO Q Y, WANG G, et al. Removal and transformation mechanisms of nitrogen and sulfur in petcoke supercritical water gasification via ReaxFF simulation[ J ]. Molecular Simulation, 2021, 48( 3 ): 209 - 220.
[ 39 ] CHEN S Y, DING J X, LI G Y, et al. Theoretical study of the formation mechanism of sulfur-containing gases in the CO2 gasification of lignite [ J ]. Fuel, 2019( 242 ): 398 - 407.
[ 40 ] HONG D K, SI T, LI X X, et al. Reactive molecular dynamic simulations of the CO2 gasification effect on the oxy-fuel combustion of Zhundong coal char [ J ]. Fuel Processing Technology, 2020( 199 ): 106 - 305.
[ 41 ] HOU R R, BAI Z Q, FAN X, et al. Novel insights into the catalytic effect of hydrogen bonds on aldehyde groups generation during direct coal liquefaction [ J ]. Fuel, 2023( 331 ): 125 - 776.
[ 42 ] VAN NIEKERK D, MATHEWS J P. Molecular dynamic simulat-
ion of coal-solvent interactions in Permian-aged South African coals [ J ]. Fuel Processing Technology, 2011, 92( 4 ): 729 - 734.
[ 43 ] 连 俊. 长焰煤及其显微组分结构模型的构建及液化性能研究[ D ].上海: 上海应用技术大学,2020.
[ 44 ] LI G Y, DING J X, ZHANG H, et al. ReaxFF simulations of hyd-
rothermal treatment of lignite and its impact on chemical structures[ J ]. Fuel, 2015( 154 ): 243 - 251.
[ 45 ] TAN S Z, YU X Z, ZHU L, et al. Heterogeneous iron-catalyzed aerobic oxidative cleavage of C-C bonds in alcohols to esters [ J ]. ACS Sustainable Chemistry & Engineering, 2022, 10( 50 ): 16 527 - 16 537.
[ 46 ] QIU Y, ZHONG W Q, YU A B. The molecular dynamics simulat-
ion of lignite combustion process in O2/CO2 atmosphere with ReaxFF force field [ J ]. Powder Technology, 2022( 410 ): 117 - 837.
[ 47 ] XIAO Y, ZENG J F, LIU J W, et al. Reactive force field (ReaxFF) molecular dynamics investigation of bituminous coal combustion under oxygen-deficient conditions[ J ]. Fuel, 2022( 318 ): 123 - 583.
[ 48 ] YU S, CHU R Z, LI X, et al. Combined ReaxFF and ab initio MD simulations of brown coal oxidation and Coal-Water interactions[ J ]. Entropy, 2021, 24( 1 ): 71 - 75.