The effect of CO on CO2-char gasification

被引：2
|
作者：
Zheng, Yaoyao [1 ]
Marek, Ewa [1 ,2 ]
Scott, Stuart A. [1 ]
机构：
[1] Univ Cambridge, Dept Engn, Trumpington St, Cambridge CB2 1PZ, England
[2] Univ Cambridge, Dept Chem Engn & Biotechnol, Philippa Fawcett Dr, Cambridge CB3 0AS, England
来源：
PROCEEDINGS OF THE COMBUSTION INSTITUTE | 2021年 / 38卷 / 03期
关键词：
CO2-char gasification; CO inhibition; Ergun?s mechanism; Three-step mechanism; CARBON-DIOXIDE; KINETICS; CHARS; MODEL;
D O I：
10.1016/j.proci.2020.06.245
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The effect of CO on the gasification of a Polish coal-derived char was investigated in a fluidised bed from 1123 to 1248 K. Rate expressions developed from Ergun?s mechanism or a modified three-step reaction mechanism, coupled with Cylindrical Pore Interpolation Model (CPIM) to account for the intra-particle mass transfer, were developed to predict gasification and the effect of CO. Compared to the Ergun?s rate expression, the three-step expression has an extra term for p co , making the inhibition effect of CO more pronounced. The agreement between experimental and numerical results was satisfactory for both models simulating gasification by CO 2 /N 2 . Then, when CO (1% or 3%) was intentionally introduced in the feed gas (CO 2 /N 2 ), the gasification rates significantly decreased. It was found that the model based on Ergun?s mechanism over-estimated the gasification rate, while the results from the model with the three-step mechanism agreed with the experimental data. (c) 2020 The Combustion Institute. Published by Elsevier Inc. All rights reserved.
引用
收藏
页码：4261 / 4269
页数：9
相关论文
共 50 条
  • [1] Density functional theory molecular modelling and experimental particle kinetics for CO2-char gasification
    Roberts, Mokone J.
    Everson, Raymond C.
    Domazetis, George
    Neomagus, Hein W. J. P.
    Jones, J. M.
    Van Sittert, Cornelia G. C. E.
    Okolo, Gregory N.
    Van Niekerk, Daniel
    Mathews, Jonathan P.
    [J]. CARBON, 2015, 93 : 295 - 314
  • [2] CATALYTIC EFFECT OF POTASSIUM ON THE RATE OF CHAR-CO2 GASIFICATION
    SAMS, DA
    SHADMAN, F
    [J]. FUEL, 1983, 62 (08) : 880 - 882
  • [3] PM10 formation during the combustion of N2-char and CO2-char of Chinese coals
    Wen, Chang
    Xu, Minghou
    Yu, Dunxi
    Sheng, Changdong
    Wu, Hongwei
    Zhang, Ping'an
    Qiao, Yu
    Yao, Hong
    [J]. PROCEEDINGS OF THE COMBUSTION INSTITUTE, 2013, 34 : 2383 - 2392
  • [4] Gasification reaction with CO2 of bituminous char
    Xu, Chao-Fen
    Sun, Lu-Shi
    Xiang, Jun
    Lu, Teng-Fei
    Xie, Tian
    [J]. Ranshao Kexue Yu Jishu/Journal of Combustion Science and Technology, 2010, 16 (04): : 347 - 352
  • [5] Modeling study for the effect of particle size on char gasification with CO2
    Shen, Zhongjie
    Xu, Jianliang
    Liu, Haifeng
    Liang, Qinfeng
    [J]. AICHE JOURNAL, 2017, 63 (02) : 716 - 724
  • [6] DFT study of the catalytic effect of Fe on the gasification of char-CO2
    Zhao, Deng
    Liu, Hui
    Lu, PengCheng
    Sun, Baizhong
    Guo, Shuai
    Qin, Ming
    [J]. FUEL, 2021, 292
  • [7] Co-gasification kinetics of coal char and algae char under CO2 atmosphere
    Qadi, Nasim M. N.
    Hidayat, Arif
    Takahashi, Fumitake
    Yoshikawa, Kunio
    [J]. BIOFUELS-UK, 2017, 8 (02): : 281 - 289
  • [8] Production of CO by CO2 Gasification of Biomass-derived Char
    Zhou, Fanglei
    Hu, Yuyan
    Chen, Dezhen
    [J]. Taiyangneng Xuebao/Acta Energiae Solaris Sinica, 2017, 38 (05): : 1440 - 1446
  • [9] Kinetics underpinning the C-CO2 gasification of waste tyre char and its interaction with coal char upon co-gasification
    Issac, Miriam
    Dai, Baiqian
    Zhang, Lian
    [J]. FUEL, 2019, 256
  • [10] The study of catalyzed gasification reaction of char by CO2
    Zhao, W
    Ye, JL
    Li, F
    Xie, KC
    [J]. PROSPECTS FOR COAL SCIENCE IN THE 21ST CENTURY, 1999, : 527 - 530
12345