Nitrogen rejection from low quality natural gas by pressure swing adsorption experiments and simulation using dynamic adsorption isotherms

Xinran Zhang; Hua Shang; Jiangfeng Yang; Libo Li; Jinping Li

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Nitrogen rejection from low quality natural gas by pressure swing adsorption experiments and simulation using dynamic adsorption isotherms

Recent Advances in Adsorptive Separation Materials and Technologies | Updated：2026-01-06

- Nitrogen rejection from low quality natural gas by pressure swing adsorption experiments and simulation using dynamic adsorption isotherms
- Chinese Journal of Chemical Engineering Vol. 42, Issue 2, Pages: 120-129(2022)
- Affiliations：
  
  1. Research Institute of Special Chemicals, College of Chemistry and Chemical Engineering, Taiyuan University of Technology,Taiyuan,China,030024
  2. Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization,Taiyuan,China,030024
- Author bio：
- Funds：
- DOI：
  CLC：
- Published：2022
- Accepted：
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Xinran Zhang, Hua Shang, Jiangfeng Yang, Libo Li, Jinping Li. Nitrogen rejection from low quality natural gas by pressure swing adsorption experiments and simulation using dynamic adsorption isotherms[J]. Chinese Journal of Chemical Engineering, 2022, 42(2): 120-129.
DOI：

Xinran Zhang, Hua Shang, Jiangfeng Yang, Libo Li, Jinping Li. Nitrogen rejection from low quality natural gas by pressure swing adsorption experiments and simulation using dynamic adsorption isotherms[J]. Chinese Journal of Chemical Engineering, 2022, 42(2): 120-129. DOI：

摘要

Abstract

In order to remove N

from low quality natural gas

a mathematical model has been established by Aspen adsorption

using the CH

-selective sorbent silicalite-1 pellets. The dynamic adsorption isotherm was first simulated by breakthrough simulation of a CH

mixture at different adsorption pressures and feed flow rates based on breakthrough experiments. The resulting simulated CH

dynamic adsorption amounts were very close to the experimental data at three different adsorption pressures (100

200

and 300 kPa). Moreover

a single-bed

three-step pressure swing adsorption (PSA) experiment was performed

and the results were in good agreement with the simulated data

further corroborating the accuracy of the gas dynamic adsorption isotherm obtained by the simulation method. Finally

based on the simulated dynamic adsorption isotherm of CH

and N

a four-bed

eight-step PSA process has been designed

which enriched 75% (vol) CH

and 80% (vol) CH

to 95% (vol) and 99% (vol)

and provided 99%

(vol) recovery.

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