Simulation of activated carbon adsorption process considering particle size distribution

LI Jihui; SHU Yidan

doi:10.13471/j.cnki.acta.snus.2021C027

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Simulation of activated carbon adsorption process considering particle size distribution

Research articles | 更新时间：2023-11-01

- Simulation of activated carbon adsorption process considering particle size distribution
- Acta Scientiarum Naturalium Universitatis Sunyatseni Vol. 61, Issue 5, Pages: 68-75(2022)
- 作者机构：
  
  中山大学材料科学与工程学院，广东广州 510006
- 作者简介：
- 基金信息：
- DOI：10.13471/j.cnki.acta.snus.2021C027
  CLC： TQ021.8
- Published：25 September 2022，
  
  Published Online：16 March 2022，
  
  Received：04 December 2021，
  
  Accepted：04 January 2022
扫描看全文
李继辉,舒逸聃.考虑粒径分布的活性炭吸附过程模拟[J].中山大学学报(自然科学版),2022,61(05):68-75.

LI Jihui,SHU Yidan.Simulation of activated carbon adsorption process considering particle size distribution[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2022,61(05):68-75.
李继辉,舒逸聃.考虑粒径分布的活性炭吸附过程模拟[J].中山大学学报(自然科学版),2022,61(05):68-75. DOI： 10.13471/j.cnki.acta.snus.2021C027.

LI Jihui,SHU Yidan.Simulation of activated carbon adsorption process considering particle size distribution[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2022,61(05):68-75. DOI： 10.13471/j.cnki.acta.snus.2021C027.

摘要

基于粒数衡算模型建立了考虑粒径分布的吸附过程模型。研究了球形活性炭吸附剂的粒径分布对其吸附性能的影响，通过对比采用粒径分布和平均粒径预测的结果，证明颗粒的粒径分布的影响是显著的。使用平均粒径预测的吸附量在吸附前期低于考虑粒径分布的预测值，而在接近平衡时会高于考虑粒径分布的预测值。忽略粒径分布的影响，会低估达到预期吸附量所需时间。以所研究的案例为例，达到97%平衡吸附量需要时间被低估了13.9%。当要求精确预测吸附剂的性能时，需要考虑粒径分布的影响。

Abstract

In this paper， we establish an adsorption process model considering particle size distribution based on the population balance model to analyze the effects of particle size distribution of spherical activated carbon adsorbent on its adsorption performance. By comparing the prediction results of using particle size distribution and average particle size， it is proved that the influence of particle size distribution is significant. The adsorption amount predicted based on average particle size is lower than that based on particle size distribution in the early stage of adsorption and gets higher when it is close to equilibrium. It shows that ignoring the influence of particle size distribution will cause underestimation of the required time to reach expected adsorption amount. In the studied case the time taken to reach 97% of the equilibrium amount is underestimated by 13.9%. When it is required to accurately predict the performance of adsorbent， the influence of particle size distribution needs to be considered.

关键词

活性炭甲醛粒数衡算动力学模型粒径分布

Keywords

activated carbonformaldehydepopulation balancekinetic modelparticle size distribution

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