单颗粒多孔MgO吸附剂CO2吸附流动传输的格子Boltzmann方法模拟

doi:10.7523/j.issn.2095-6134.2020.02.015

中国科学院大学学报 ›› 2020, Vol. 37 ›› Issue (2): 248-254.DOI: 10.7523/j.issn.2095-6134.2020.02.015

单颗粒多孔MgO吸附剂CO₂吸附流动传输的格子Boltzmann方法模拟

刘波, 丁玉栋, 廖强, 朱恂, 王宏

重庆大学工程热物理研究所低品位能源利用及系统教育部重点实验室, 重庆 400030

收稿日期:2019-01-23 修回日期:2019-05-15 发布日期:2020-03-15
通讯作者: 丁玉栋
基金资助:
国家自然科学基金（51876013，51576022）、重庆市留创计划（CX2018054）和中央高校基本科研业务费（2018CDXYDL0001）资助

Lattice Boltzmann simulation of flow and mass transfer of CO₂ adsorption in porous MgO particle

LIU Bo, DING Yudong, LIAO Qiang, ZHU Xun, WANG Hong

Key Laboratory of Low-grade Energy Utilization Technologies and Systems of Ministry of Education, Institute of Engineering Thermophysics, Chongqing University, Chongqing 400030, China

Received:2019-01-23 Revised:2019-05-15 Published:2020-03-15

摘要/Abstract

摘要： 应用格子Boltzmann方法对MgO颗粒CO₂吸附过程流动与传输特性进行模拟。基于二级反应动力学模型，研究孔隙率和粒径对颗粒内渗流速度、CO₂浓度、CO₂吸附速率和MgO颗粒固体转化率的影响。结果表明：沿流动方向颗粒内CO₂浓度与颗粒转化率逐渐递减；在相同时间下，颗粒粒径越大，颗粒内渗流速度和CO₂浓度越低，转化率和吸附速率越低；相同粒径和相同时间下，孔隙率越大，CO₂浓度和MgO固体转化率越高，平均吸附速率越快。

关键词: 格子-Boltzmann方法, 多孔吸附剂, CO₂吸附, MgO颗粒, 气固反应

Abstract: The lattice-Boltzmann method was used to simulate the characteristics of flow and mass transfer of CO₂ adsorption process in MgO particle. Effects of porosity and particle size of the MgO particle on the percolation velocity, CO₂ concentration, CO₂ adsorption rate, and adsorbent conversion rate were simulated based on the second-order reaction kinetic model. The results show that the CO₂ concentration and adsorbent conversion rate decreased gradually along the gas flow direction in MgO particle. For the same adsorption time, the bigger the particle size was, the lower the percolation velocity, CO₂ adsorption rate, and adsorbent conversion rate in particle were. For the same adsorption time and particle size, with the increase in the porosity of the particle, the absorbent conversion rate and CO₂ concentration increased and the average adsorption rate also sped up.

Key words: lattice-Boltzmann method, porous adsorbent, CO₂ adsorption, MgO particle, gas-solid reaction

中图分类号:

刘波, 丁玉栋, 廖强, 朱恂, 王宏. 单颗粒多孔MgO吸附剂CO₂吸附流动传输的格子Boltzmann方法模拟[J]. 中国科学院大学学报, 2020, 37(2): 248-254.

LIU Bo, DING Yudong, LIAO Qiang, ZHU Xun, WANG Hong. Lattice Boltzmann simulation of flow and mass transfer of CO₂ adsorption in porous MgO particle[J]. , 2020, 37(2): 248-254.

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单颗粒多孔MgO吸附剂CO₂吸附流动传输的格子Boltzmann方法模拟

Lattice Boltzmann simulation of flow and mass transfer of CO₂ adsorption in porous MgO particle

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