Preparation of coconut shell-based carbon molecular sieves for air separation by pressure swing adsorption

LI Xing-wei; XU Shao-ping; CONG Yuan-yuan

doi:10.13374/j.issn2095-9389.2017.03.017

Volume 39 Issue 3

Mar. 2017

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LI Xing-wei, XU Shao-ping, CONG Yuan-yuan. Preparation of coconut shell-based carbon molecular sieves for air separation by pressure swing adsorption[J]. Chinese Journal of Engineering, 2017, 39(3): 443-448. doi: 10.13374/j.issn2095-9389.2017.03.017

Citation:

LI Xing-wei, XU Shao-ping, CONG Yuan-yuan. Preparation of coconut shell-based carbon molecular sieves for air separation by pressure swing adsorption[J]. Chinese Journal of Engineering, 2017, 39(3): 443-448. doi: 10.13374/j.issn2095-9389.2017.03.017

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Preparation of coconut shell-based carbon molecular sieves for air separation by pressure swing adsorption

doi: 10.13374/j.issn2095-9389.2017.03.017

Faculty of Chemical, Environmental and Biological Science and Technology, Dalian University of Technology, Dalian 116024, China

Received Date: 2016-05-19

Abstract

Abstract

A novel process for preparation of a carbon molecular sieve (CMS) was proposed. With coconut shell char as a carbon precursor and phenol formaldehyde resin (PF) as a binder, the process consists of a series of stages, i. e., forming, carbonization, activation with steam, and two-step chemical vapor deposition with benzene as a carbon source. The CMS has been used as an adsorbent in pressure swing adsorption (PSA) of air for N₂ production. The evaluation method of CMS based on PSA was developed by introducing a couple of analysis items including the amount of the effluent desorption gas in PSA and the O₂ concentration in it. In this way, the development of the effective volume and size of the micropores of CMS during the preparation stages could be followed and controlled on purpose. The coconut shell-based CMS prepared by this method has a superior compressive strength and a comparable PSA performance to those commercial CMSs.
- carbon molecular sieves,
- pressure swing adsorption,
- coconut shells,
- air separation

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References(10)

References

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