Influence of moisture on carbon dioxide separation from simulated flue gas by a novel "molecular basket" adsorbent

Xiaochun Xu, Chunshan Song, Bruce G. Miller, Alan W. Scaroni

Research output: Contribution to journalArticle

Abstract

Adsorption separation of CO2 was studied using a novel "molecular basket" adsorbent and simulated flue gas mixtures containing CO2, O2, N2 with and without moisture. Compared with the adsorption separation of CO2 from simulated dry flue gas, both the CO2 breakthrough time and CO2 adsorption capacity increased upon addition of the moisture into the simulated dry flue gas. This indicated that moisture has a promoting effect on the adsorption separation of CO2 from simulated flue gas mixture by the novel "molecular basket". When the feed concentration of moisture was lower than that of CO2, CO2 adsorption capacity increased rapidly with the increase of moisture concentration. When the feed concentration of moisture became larger than that of CO2, the increase in CO2 adsorption capacity recessed. Maximum promoting effect of moisture appeared at moisture concentrations approaching that of CO2 in the flue gas. The cyclic adsorption/desorption separation results showed that the novel "molecular basket" adsorbent is stable in the cyclic operations of CO2 adsorption separation from moist flue gas.

Original languageEnglish (US)
JournalACS National Meeting Book of Abstracts
Volume227
Issue number1
StatePublished - 2004

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Flue gases
Carbon Dioxide
Adsorbents
Carbon dioxide
Moisture
Adsorption
Gas mixtures
Desorption

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)

Cite this

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abstract = "Adsorption separation of CO2 was studied using a novel {"}molecular basket{"} adsorbent and simulated flue gas mixtures containing CO2, O2, N2 with and without moisture. Compared with the adsorption separation of CO2 from simulated dry flue gas, both the CO2 breakthrough time and CO2 adsorption capacity increased upon addition of the moisture into the simulated dry flue gas. This indicated that moisture has a promoting effect on the adsorption separation of CO2 from simulated flue gas mixture by the novel {"}molecular basket{"}. When the feed concentration of moisture was lower than that of CO2, CO2 adsorption capacity increased rapidly with the increase of moisture concentration. When the feed concentration of moisture became larger than that of CO2, the increase in CO2 adsorption capacity recessed. Maximum promoting effect of moisture appeared at moisture concentrations approaching that of CO2 in the flue gas. The cyclic adsorption/desorption separation results showed that the novel {"}molecular basket{"} adsorbent is stable in the cyclic operations of CO2 adsorption separation from moist flue gas.",
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AU - Xu, Xiaochun

AU - Song, Chunshan

AU - Miller, Bruce G.

AU - Scaroni, Alan W.

PY - 2004

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N2 - Adsorption separation of CO2 was studied using a novel "molecular basket" adsorbent and simulated flue gas mixtures containing CO2, O2, N2 with and without moisture. Compared with the adsorption separation of CO2 from simulated dry flue gas, both the CO2 breakthrough time and CO2 adsorption capacity increased upon addition of the moisture into the simulated dry flue gas. This indicated that moisture has a promoting effect on the adsorption separation of CO2 from simulated flue gas mixture by the novel "molecular basket". When the feed concentration of moisture was lower than that of CO2, CO2 adsorption capacity increased rapidly with the increase of moisture concentration. When the feed concentration of moisture became larger than that of CO2, the increase in CO2 adsorption capacity recessed. Maximum promoting effect of moisture appeared at moisture concentrations approaching that of CO2 in the flue gas. The cyclic adsorption/desorption separation results showed that the novel "molecular basket" adsorbent is stable in the cyclic operations of CO2 adsorption separation from moist flue gas.

AB - Adsorption separation of CO2 was studied using a novel "molecular basket" adsorbent and simulated flue gas mixtures containing CO2, O2, N2 with and without moisture. Compared with the adsorption separation of CO2 from simulated dry flue gas, both the CO2 breakthrough time and CO2 adsorption capacity increased upon addition of the moisture into the simulated dry flue gas. This indicated that moisture has a promoting effect on the adsorption separation of CO2 from simulated flue gas mixture by the novel "molecular basket". When the feed concentration of moisture was lower than that of CO2, CO2 adsorption capacity increased rapidly with the increase of moisture concentration. When the feed concentration of moisture became larger than that of CO2, the increase in CO2 adsorption capacity recessed. Maximum promoting effect of moisture appeared at moisture concentrations approaching that of CO2 in the flue gas. The cyclic adsorption/desorption separation results showed that the novel "molecular basket" adsorbent is stable in the cyclic operations of CO2 adsorption separation from moist flue gas.

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