CH<sub>4</sub>/N<sub>2</sub> separation on methane molecules grade diameter channel molecular sieves with a CHA-type structure

Hua Shang; Yuping Li; Jiaqi Liu; Xuan Tang; Jiangfeng Yang; Jinping Li

doi:10.1016/j.cjche.2018.09.007

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CH₄/N₂ separation on methane molecules grade diameter channel molecular sieves with a CHA-type structure

Separation Science and Engineering | Updated：2026-01-06

- CH₄/N₂ separation on methane molecules grade diameter channel molecular sieves with a CHA-type structure
- Chinese Journal of Chemical Engineering Vol. 27, Issue 5, Pages: 1044-1049(2019)
- Affiliations：
  
  1. Research Institute of Special Chemicals, College of Chemistry and Chemical Engineering, Taiyuan University of Technology,Taiyuan,China,030024
  2. College of Materials Science and Engineering, Taiyuan University of Technology,Taiyuan,China,030024
  3. Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization,Taiyuan,China,030024
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2018.09.007
  CLC：
- Published：2019
- Accepted：
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DOI：

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摘要

Abstract

Samples of methane molecules grade diameter channel CHA-type molecular sieves (Chabazite-K

SAPO-34 and SSZ-13) were investigated using the adsorption separation of CH

mixtures. The isotherms recorded for CH

and N

follow a typical type-Ι behavior

which were fitted well with the Sips model (

0.999) and the selectivity was calculated using IAST theory. The results reveal that Chabazite-K has the highest selectivity (

=5.5). SSZ-13 has the largest capacity

which can adsorb up to a maximum of 30.957 cm

·g

-1

(STP) of CH

due to it having the largest pore volume and surface area

but the lowest selectivity (S

=2.5). From the breakthrough test

we can conclude that SSZ-13 may be a suitable candidate for the recovery of CH

from low concentration methane (CH

20%) based on its larger pore volume and higher CH

capacity. Chabazite-K is more suited to the separation of high concentration methane (CH

50%) due to its higher selectivity.

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⁰

CH4/N2 separation on methane molecules grade diameter channel molecular sieves with a CHA-type structure

DOI：10.1016/j.cjche.2018.09.007

摘要

Abstract

关键词

Keywords

references

CH₄/N₂ separation on methane molecules grade diameter channel molecular sieves with a CHA-type structure