Experimental Investigation of the Hydrate-Based Gas Separation of Synthetic Flue Gas with 5A Zeolite

Xiaoya Zang, Na Zhang, Xuebing Zhou, Lihua Wan and Deqing Liang
Additional contact information
Xiaoya Zang: Guangzhou Institute of Energy Conversion, Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences, Guangzhou 510640, China
Na Zhang: Guangzhou Institute of Energy Conversion, Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences, Guangzhou 510640, China
Xuebing Zhou: Guangzhou Institute of Energy Conversion, Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences, Guangzhou 510640, China
Lihua Wan: Guangzhou Institute of Energy Conversion, Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences, Guangzhou 510640, China
Deqing Liang: Guangzhou Institute of Energy Conversion, Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences, Guangzhou 510640, China

Energies, 2020, vol. 13, issue 17, 1-12

Abstract: Coal combustion flue gas contains CO 2 , a greenhouse gas and driver of climate change. Therefore, CO 2 separation and removal is necessary. Fortunately, 5A zeolites are highly porous and can be used as a CO 2 adsorbent. In addition, they act as nuclei for hydrate formation. In this work, a composite technology, based on the physical adsorption of CO 2 by 5A zeolite and hydrate-based gas separation, was used to separate CO 2 /N 2 gas mixtures. The influence of water content, temperature, pressure, and particle size on gas adsorption and CO 2 separation was studied, revealing that the CO 2 separation ability of zeolite particles sized 150–180 μm was better than that of those sized 380–830 μm at 271.2 K and 273.2 K. When the zeolite particles were 150–180 μm (type-B zeolite) with a water content of 35.3%, the gas consumption per mole of water ( n g a s / n H 2 O ) reached the maximum, 0.048, and the CO 2 separation ratio reached 14.30%. The CO 2 molar concentration in the remaining gas phase ( x C O 2 g a s ) was lowest at 271.2 K in the type-B zeolite system with a water content of 47.62%. Raman analysis revealed that CO 2 preferentially occupied the small hydrate cages and there was a competitive relationship between N 2 and CO 2 .

Keywords: hydrate; 5A zeolite; flue gas; CO 2 separation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/1996-1073/13/17/4556/pdf (application/pdf)
https://www.mdpi.com/1996-1073/13/17/4556/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:13:y:2020:i:17:p:4556-:d:407985

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().