Adsorption dynamics of ethane from air in structured fixed beds with different microfibrous composites

doi:10.1016/j.cjche.2021.11.009

中国化学工程学报 ›› 2023, Vol. 53 ›› Issue (1): 14-24.DOI: 10.1016/j.cjche.2021.11.009

• Full Length Article • 上一篇下一篇

Adsorption dynamics of ethane from air in structured fixed beds with different microfibrous composites

Huan Xiang^1,2, Huiping Zhang¹, Pengfei Liu¹, Ying Yan¹

1. School of Chemistry and Chemical Engineering, Guangdong Provincial Key Laboratory of Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, China;
2. Energy and Bioproducts Research Institute (EBRI), Aston University, Birmingham B4 7ET, United Kingdom

收稿日期:2021-08-31 修回日期:2021-11-16 出版日期:2023-01-28 发布日期:2023-04-08
通讯作者: Ying Yan,E-mail:yingyan@scut.edu.cn
基金资助:
The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (21776101), and the National Natural Science Foundation of China (22178122) for this work.

Adsorption dynamics of ethane from air in structured fixed beds with different microfibrous composites

Huan Xiang^1,2, Huiping Zhang¹, Pengfei Liu¹, Ying Yan¹

1. School of Chemistry and Chemical Engineering, Guangdong Provincial Key Laboratory of Green Chemical Product Technology, South China University of Technology, Guangzhou 510640, China;
2. Energy and Bioproducts Research Institute (EBRI), Aston University, Birmingham B4 7ET, United Kingdom

Received:2021-08-31 Revised:2021-11-16 Online:2023-01-28 Published:2023-04-08
Contact: Ying Yan,E-mail:yingyan@scut.edu.cn
Supported by:
The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (21776101), and the National Natural Science Foundation of China (22178122) for this work.

摘要/Abstract

摘要： Adsorption dynamics of ethane in two granular fixed beds and structured fixed beds with microfibrous composites was studied. 5A zeolite membrane 5A/PSSF (paper-like sintered stainless steel fiber) and microfibrous entrapped activated carbon (MEAC) composites were prepared by wet layup papermaking/sintering technique and in-situ hydrothermal method. Microfibrous composites were characterized by X-ray diffraction, scanning electron microscopy and N₂ adsorption/desorption. Structured fixed beds were designed by filling granular adsorbents (5A zeolite or activated carbon) and microfibrous composites at the inlet and outlet of the beds, respectively. Effects of flow rate, bed height and structure on the breakthrough curves were investigated. The length of unused bed (LUB) was determined, and Yoon–Nelson model was used to fit the breakthrough curves. The experimental results showed ethane was effectively adsorbed on the granular adsorbents and microfibrous composites. Both composites could decrease the LUB values and enhance bed utilization. All breakthrough curves fitted well to Yoon–Nelson model, with correlation coefficient exceeding 0.89. The adsorption rate of ethane could be improved in the structured fixed beds, which showed an enhanced mass transfer efficiency for ethane adsorption. LUB values of structured fixed beds with 5A/PSSF composites were larger, the bed utilization values were lower, and the adsorption rate constants were higher than those with MEAC composites under the same conditions.

关键词: 5A zeolite membrane, Microfibrous entrapped activated carbon, Ethane, Structured fixed bed, Adsorption dynamics

Abstract: Adsorption dynamics of ethane in two granular fixed beds and structured fixed beds with microfibrous composites was studied. 5A zeolite membrane 5A/PSSF (paper-like sintered stainless steel fiber) and microfibrous entrapped activated carbon (MEAC) composites were prepared by wet layup papermaking/sintering technique and in-situ hydrothermal method. Microfibrous composites were characterized by X-ray diffraction, scanning electron microscopy and N₂ adsorption/desorption. Structured fixed beds were designed by filling granular adsorbents (5A zeolite or activated carbon) and microfibrous composites at the inlet and outlet of the beds, respectively. Effects of flow rate, bed height and structure on the breakthrough curves were investigated. The length of unused bed (LUB) was determined, and Yoon–Nelson model was used to fit the breakthrough curves. The experimental results showed ethane was effectively adsorbed on the granular adsorbents and microfibrous composites. Both composites could decrease the LUB values and enhance bed utilization. All breakthrough curves fitted well to Yoon–Nelson model, with correlation coefficient exceeding 0.89. The adsorption rate of ethane could be improved in the structured fixed beds, which showed an enhanced mass transfer efficiency for ethane adsorption. LUB values of structured fixed beds with 5A/PSSF composites were larger, the bed utilization values were lower, and the adsorption rate constants were higher than those with MEAC composites under the same conditions.

Key words: 5A zeolite membrane, Microfibrous entrapped activated carbon, Ethane, Structured fixed bed, Adsorption dynamics

Huan Xiang, Huiping Zhang, Pengfei Liu, Ying Yan. Adsorption dynamics of ethane from air in structured fixed beds with different microfibrous composites[J]. 中国化学工程学报, 2023, 53(1): 14-24.

Huan Xiang, Huiping Zhang, Pengfei Liu, Ying Yan. Adsorption dynamics of ethane from air in structured fixed beds with different microfibrous composites[J]. Chinese Journal of Chemical Engineering, 2023, 53(1): 14-24.

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Adsorption dynamics of ethane from air in structured fixed beds with different microfibrous composites

Adsorption dynamics of ethane from air in structured fixed beds with different microfibrous composites

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