Experiment on effect of X type zeolites on separation of CO2 / CH4 mixture based on dynamic adsorption

被引：0

作者：

Sun Y. ^{[1
,2
]}

Tang J. ^{[1
]}

Liu X. ^{[1
]}

Li G. ^{[1
]}

Hua Y. ^{[3
]}

Hu S. ^{[3
]}

Xu T. ^{[1
]}

Wang M. ^{[1
]}

机构：

[1] College of Pipeline and Civil Engineering, China University of Petroleum (East China), Qingdao

[2] College of Zhongran Engineering, Hebei Normal University, Shijiazhuang

[3] CNOOC Gas & Power Group Research & Development Center, Beijing

来源：

Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | 2022年 / 46卷 / 04期

关键词：

13X zeolite; adsorption capacity; natural gas; separation factor;

D O I：

10.3969/j.issn.1673-5005.2022.04.020

中图分类号：

学科分类号：

摘要：

Adsorption is one of the alternative techniques to the energy-intensive processes to remove CO2 in the natural gas, and the efficient adsorbents are critical to decarburization of the natural gas at a high pressure with a low CO2 concentration. The 13X and a process-improved zeolite X(PIMX) were chosen as the adsorbents. The effects of the material̍s physicochemical properties and process parameters on the CO2 / CH4 separation performance were studied by the material characterization and dynamic adsorption experiments in the lab. The dynamic adsorption of the real medium (compressed natural gas, CNG) on site for PIMX was conducted to verify the results in the lab. The results show that the PIMX zeolites with the smaller Si/ Al ratio, the larger surface to volume ratio and the larger pore volume, exhibit a better separation performance than 13X. The diffusion rate of CO2 in the micropores of zeolites was slower than that of CH4. The interaction between CO2 and zeolites was stronger than that between CH4 and zeolites, so the longer contact time between gas mixture and zeolites is helpful to the separation. The pilot experiment on site verified the experimental results in the lab to some extent. The adsorption capacities of CO2 when the molar mass is 0. 005% at the column outlet on PIMX in the lab and on site, were 2. 75 and 2. 58 mmol/ g, respectively. © 2022 University of Petroleum, China. All rights reserved.

引用

页码：160 / 167

页数：7

共 20 条

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