Study of CO2 removal in natural gas process using mixture of ionic liquid and MEA through process simulation

FUEL

卷:236

Article

Akinola, Toluleke Emmanuel¹  Oko, Eni¹  Wang, Meihong¹ 

[1] Univ Sheffield, Dept Chem & Biol Engn, Sheffield S1 3JD, S Yorkshire, England

关键词: Natural gas processing;    CO2 removal;    Chemical absorption;    MEA;    Ionic liquid;    Process simulation;   

DOI  :  10.1016/j.fuel.2018.08.152

来源: Elsevier

【 摘 要 】

There has been a shift to less carbon intensive fuels such as natural gas to meet energy demand due to increasing pressure to cut CO2 emissions. This has prompted a need to assess unconventional and contaminated natural gas reserves (which contains CO2 concentration of 20 mol% or more). The CO2 capture process with MEA as the solvent is mostly adopted to treat contaminated natural gas. In this study, the option of using a blend of ionic liquids (IL) and MEA as a promising solvent in the process was investigated through modelling and simulation. A detailed rate-based model was developed for both MEA (30 wt%) solvent and IL (30 wt%)-MEA (30 wt%) blend using Aspen Plus (R) to assess both process and economic performances. The 1-Butylpyridinium ([bpy][BF4]) ionic liquid was selected in this study. The physiochemical properties of [bpy][BF4], predicted using Aspen Plus (R), showed good accuracy compared with experimental data. The results from this study showed about 15% and 7.44% lower energy consumption in the reboiler duty and CO2 removal cost respectively with aqueous [bpy][BF4]-MEA solvent compared to 30 wt% MEA solvent. It is concluded that the aqueous [bpy][BF4]-MEA solvent is therefore a promising solvent that could replace 30 wt% MEA solvent in this process.

【 授权许可】

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