Effect of adsorption column porosity on removing CO2 from natural gas

doi:10.16085/j.issn.1000-6613.2017.02.005

Abstract

Abstract: The porosity of adsorption column was changed due to the swing motion of the boat for the offshore natural gas production. To study the effect of adsorption column porosity on adsorption purification, an adsorption experimental apparatus was built. A two-dimensional adsorption purification model was established based on the experiment data, and the validity of the model was confirmed. Result shows that the mass fraction of CH₄ at the exit of adsorption column rose to more than 0.99 mole fraction with the increase of adsorption column porosity at the static state. The adsorption heat in the adsorption column rose with the increase of adsorption column porosity. In the case of flowing adsorption, the pressure drop in the adsorption column decreased dramatically with the increase of adsorption column porosity. The best adsorption purification achieved when the adsorption column porosity was 0.35. Along the axis direction of the adsorption column, adsorption heat showed a downward trend, and decreased rapidly with the decrease of the adsorption column porosity. This study will help improve the production efficiency of offshore natural gas, and have a significant effect on the rapid development of natural gas.

Key words: adsorption column, porosity, porous media, adsorption purification model, natural gas

摘要： 为了研究海上天然气脱CO₂时因摇摆导致吸附罐空隙率变化对吸附净化效果的影响，搭建吸附实验台，利用实验数据，建立二维吸附净化模型，并验证了模型的有效性。结果表明：不流动吸附状态下，随着吸附罐空隙率的增加，吸附罐出口处的甲烷摩尔分数呈现上升趋势，且摩尔分数大于99%。同时空隙率范围在0.25~0.5之间，吸附罐内的吸附热随着空隙率的增大呈现上升趋势；流动吸附时，随着空隙率的增大，吸附罐内压降呈现下降趋势且下降剧烈。吸附罐空隙率为0.35时，吸附净化效果最佳。吸附罐内沿轴线方向吸附热呈现下降趋势，并且吸附罐空隙率越小，吸附热沿轴线方向下降越剧烈。本文的研究结果有助于海上天然气的开采，对天然气的快速发展具有十分重要的意义。

关键词: 吸附罐, 空隙率, 多孔介质, 吸附净化模型, 天然气

CLC Number:

TE53

CHEN Shujun, TAO Zhicheng, FU Yue, ZHU Min, LI Wenliang, HUANG Yixiong. Effect of adsorption column porosity on removing CO₂ from natural gas[J]. Chemical Industry and Engineering Progree, 2017, 36(02): 435-441.

陈树军, 陶致成, 付越, 朱敏, 李文亮, 黄毅雄. 吸附罐空隙率对天然气脱CO₂性能的影响[J]. 化工进展, 2017, 36(02): 435-441.

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Effect of adsorption column porosity on removing CO₂ from natural gas

吸附罐空隙率对天然气脱CO₂性能的影响

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