Lattice Boltzmann method for simulating carbon dioxide capture with Ca-based sorbent

张婷1; 郭照立1

doi:10.3969/j.issn.0438-1157.2012.z1.029

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Lattice Boltzmann method for simulating carbon dioxide capture with Ca-based sorbent

更新时间：2025-12-10

- Lattice Boltzmann method for simulating carbon dioxide capture with Ca-based sorbent
- CIESC Journal Issue S1, Pages: 165-171(2012)
- 作者机构：
  
  1. 1华中科技大学煤燃烧国家重点实验室
  2. 华中科技大学数学与统计学院,湖北,武汉
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2012.z1.029
  CLC：
- Online First：28 May 2012，
  
  Published：28 May 2012
- 稿件说明：
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张婷1, 郭照立1. Lattice Boltzmann method for simulating carbon dioxide capture with Ca-based sorbent[J]. CIESC Journal, 2012, (S1): 165-171.
DOI：

张婷1, 郭照立1. Lattice Boltzmann method for simulating carbon dioxide capture with Ca-based sorbent[J]. CIESC Journal, 2012, (S1): 165-171. DOI： 10.3969/j.issn.0438-1157.2012.z1.029.

摘要

近年来，利用CaO吸收烟气中的CO2越来越受到国内外研究者的关注。考虑到单松弛格子Boltzmann模型(LBGK模型)在模拟多孔介质内流动时存在的不足，采用了多松弛(MRT)格子Boltzmann方法来研究多孔CaO吸收CO2的过程，并分析了不同参数，如Damkohler数(Da)、摩尔体积比和CaO颗粒的粒径对CaO转化率的影响。研究结果表明：当Da越大或者摩尔体积比越大时，CaO的转化率会越来越低；另外，如果CaO颗粒的粒径越大，其转化率也将会越低。这些结论定性上与实验结果是吻合的。

Abstract

Nowadays，the study for CO2 capture with Ca-based sorbent from coal combustion has gained much attention.In this paper，the lattice Boltzmann method (LBM)is used to study the carbonation of porous CaO with CO2.The most popular LBM is the lattice Bhatnagar-Gross-Krook (LBGK)model.However，when LBGK model is used to simulate porous flows，the numerical instability and viscosity-dependence of boundary conditions will result in viscosity-dependent permeability.While the multiple-relaxation-time (MRT)LBM proposed recently can overcome these defects，so the MRT-LBM is chosen to study various effect factors on the gas-solid reaction in porous media.The numerical results show that，as the Damkohler number (Da) or the molar volume ratio between CaCO3 and CaO is increased，the carbonation conversion of CaO will be reduced，while the radius of CaO grain is decreased，the carbonation conversion of CaO will be enhanced.These results are consistent with experimental results qualitatively.

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