Evaluation and optimization of VPSA processes with nanostructured zeolite NaX for post-combustion CO 2 capture

Mai Xu, Shaojiang Chen, Dong Kyun Seo, Shuguang Deng

Research output: Contribution to journalArticle

Abstract

We present a comprehensive experimental and simulation study on a low-cost and efficient CO 2 capture technique using nanostructured zeolite NaX in a vacuum pressure swing adsorption (VPSA) process. The nanostructured zeolite NaX adsorbent has a high CO 2 adsorption capacity, a relatively high adsorption and desorption rate, and a large CO 2 selectivity over N 2 . Therefore, it is suitable for post combustion CO 2 capture from dry flue gas. A series of nanostructured zeolite NaX pellets are prepared with different ratios of binder material and at different sintering temperatures. The results from mechanical properties, adsorption isotherms, kinetics and breakthrough experiments demonstrate that nanostructured zeolite material prepared with a low ratio of binder that sintered at 500 °C has the best separation performance for a CO 2 /N 2 mixture. In addition, the results indicate that the nanostructured zeolite NaX samples lead to a better separation performance compared with the commercial microsized zeolite NaX. Process optimization studies employing the above adsorbents were performed to minimize the energy consumption of the process for a specified product purity and recovery rate. The decision variables include the feed pressure, blowdown pressure, evacuation pressure, feed flow rate, and length to diameter ratio of the adsorption bed. The effect of cycle time was investigated independently due to the need for synchronization of the multi-bed configuration. The optimization results indicate that the energy consumption of the process with nanostructured zeolite is about 30% lower while achieving a higher CO 2 purity and productivity compared with a process employing a commercial microsized zeolite.

Original languageEnglish
Pages (from-to)693-705
Number of pages13
JournalChemical Engineering Journal
Volume371
DOIs
Publication statusPublished - Sep 1 2019

Fingerprint

Zeolites
Carbon Monoxide
zeolite
combustion
Vacuum
adsorption
Adsorption
Adsorbents
Binders
Energy utilization
Adsorption isotherms
Flue gases
Nanostructured materials
Desorption
Synchronization
Sintering
Productivity
Flow rate
Recovery
Mechanical properties

Keywords

  • CO capture
  • Equilibrium
  • Nanostructured zeolite
  • Pellet
  • Simulation
  • Vacuum swing adsorption

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Cite this

Evaluation and optimization of VPSA processes with nanostructured zeolite NaX for post-combustion CO 2 capture . / Xu, Mai; Chen, Shaojiang; Seo, Dong Kyun; Deng, Shuguang.

In: Chemical Engineering Journal, Vol. 371, 01.09.2019, p. 693-705.

Research output: Contribution to journalArticle

@article{91b130acede746e69c85e2aecef62718,
title = "Evaluation and optimization of VPSA processes with nanostructured zeolite NaX for post-combustion CO 2 capture",
abstract = "We present a comprehensive experimental and simulation study on a low-cost and efficient CO 2 capture technique using nanostructured zeolite NaX in a vacuum pressure swing adsorption (VPSA) process. The nanostructured zeolite NaX adsorbent has a high CO 2 adsorption capacity, a relatively high adsorption and desorption rate, and a large CO 2 selectivity over N 2 . Therefore, it is suitable for post combustion CO 2 capture from dry flue gas. A series of nanostructured zeolite NaX pellets are prepared with different ratios of binder material and at different sintering temperatures. The results from mechanical properties, adsorption isotherms, kinetics and breakthrough experiments demonstrate that nanostructured zeolite material prepared with a low ratio of binder that sintered at 500 °C has the best separation performance for a CO 2 /N 2 mixture. In addition, the results indicate that the nanostructured zeolite NaX samples lead to a better separation performance compared with the commercial microsized zeolite NaX. Process optimization studies employing the above adsorbents were performed to minimize the energy consumption of the process for a specified product purity and recovery rate. The decision variables include the feed pressure, blowdown pressure, evacuation pressure, feed flow rate, and length to diameter ratio of the adsorption bed. The effect of cycle time was investigated independently due to the need for synchronization of the multi-bed configuration. The optimization results indicate that the energy consumption of the process with nanostructured zeolite is about 30{\%} lower while achieving a higher CO 2 purity and productivity compared with a process employing a commercial microsized zeolite.",
keywords = "CO capture, Equilibrium, Nanostructured zeolite, Pellet, Simulation, Vacuum swing adsorption",
author = "Mai Xu and Shaojiang Chen and Seo, {Dong Kyun} and Shuguang Deng",
year = "2019",
month = "9",
day = "1",
doi = "10.1016/j.cej.2019.03.275",
language = "English",
volume = "371",
pages = "693--705",
journal = "Chemical Engineering Journal",
issn = "1385-8947",
publisher = "Elsevier",

}

TY - JOUR

T1 - Evaluation and optimization of VPSA processes with nanostructured zeolite NaX for post-combustion CO 2 capture

AU - Xu, Mai

AU - Chen, Shaojiang

AU - Seo, Dong Kyun

AU - Deng, Shuguang

PY - 2019/9/1

Y1 - 2019/9/1

N2 - We present a comprehensive experimental and simulation study on a low-cost and efficient CO 2 capture technique using nanostructured zeolite NaX in a vacuum pressure swing adsorption (VPSA) process. The nanostructured zeolite NaX adsorbent has a high CO 2 adsorption capacity, a relatively high adsorption and desorption rate, and a large CO 2 selectivity over N 2 . Therefore, it is suitable for post combustion CO 2 capture from dry flue gas. A series of nanostructured zeolite NaX pellets are prepared with different ratios of binder material and at different sintering temperatures. The results from mechanical properties, adsorption isotherms, kinetics and breakthrough experiments demonstrate that nanostructured zeolite material prepared with a low ratio of binder that sintered at 500 °C has the best separation performance for a CO 2 /N 2 mixture. In addition, the results indicate that the nanostructured zeolite NaX samples lead to a better separation performance compared with the commercial microsized zeolite NaX. Process optimization studies employing the above adsorbents were performed to minimize the energy consumption of the process for a specified product purity and recovery rate. The decision variables include the feed pressure, blowdown pressure, evacuation pressure, feed flow rate, and length to diameter ratio of the adsorption bed. The effect of cycle time was investigated independently due to the need for synchronization of the multi-bed configuration. The optimization results indicate that the energy consumption of the process with nanostructured zeolite is about 30% lower while achieving a higher CO 2 purity and productivity compared with a process employing a commercial microsized zeolite.

AB - We present a comprehensive experimental and simulation study on a low-cost and efficient CO 2 capture technique using nanostructured zeolite NaX in a vacuum pressure swing adsorption (VPSA) process. The nanostructured zeolite NaX adsorbent has a high CO 2 adsorption capacity, a relatively high adsorption and desorption rate, and a large CO 2 selectivity over N 2 . Therefore, it is suitable for post combustion CO 2 capture from dry flue gas. A series of nanostructured zeolite NaX pellets are prepared with different ratios of binder material and at different sintering temperatures. The results from mechanical properties, adsorption isotherms, kinetics and breakthrough experiments demonstrate that nanostructured zeolite material prepared with a low ratio of binder that sintered at 500 °C has the best separation performance for a CO 2 /N 2 mixture. In addition, the results indicate that the nanostructured zeolite NaX samples lead to a better separation performance compared with the commercial microsized zeolite NaX. Process optimization studies employing the above adsorbents were performed to minimize the energy consumption of the process for a specified product purity and recovery rate. The decision variables include the feed pressure, blowdown pressure, evacuation pressure, feed flow rate, and length to diameter ratio of the adsorption bed. The effect of cycle time was investigated independently due to the need for synchronization of the multi-bed configuration. The optimization results indicate that the energy consumption of the process with nanostructured zeolite is about 30% lower while achieving a higher CO 2 purity and productivity compared with a process employing a commercial microsized zeolite.

KW - CO capture

KW - Equilibrium

KW - Nanostructured zeolite

KW - Pellet

KW - Simulation

KW - Vacuum swing adsorption

UR - http://www.scopus.com/inward/record.url?scp=85064324547&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85064324547&partnerID=8YFLogxK

U2 - 10.1016/j.cej.2019.03.275

DO - 10.1016/j.cej.2019.03.275

M3 - Article

VL - 371

SP - 693

EP - 705

JO - Chemical Engineering Journal

JF - Chemical Engineering Journal

SN - 1385-8947

ER -