Modification of CaO adsorbent for enhancing its adsorption capacity during cyclic CO2 greenhouse gas capture

Yi Tsen Chen*, Mani Karthik, Hsun-Ling Bai

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

A Cao adsorbent was modified using an organic aluminum precursor to enhance its adsorption capacity during cyclic CO2 greenhouse gas capture. During cyclic adsorption test, the Al-modified CaO adsorbent with 5 wt % Ca12Al14O33 (CaAl(95)) adsorbent had a better adsorption capacity than the un-modified CaO. From 5 to 60 cycles, the CO2 adsorption capacity of CaAl(95) was about 20% higher than that of CaO adsorbent. At 66th cycle, the adsorption time was extended to 1 hr, the CO2 adsorption capacity of CaAl(95) was 25% higher than that of CaO adsorbent. Thus, the required quantity of CaO adsorbent could be significantly reduced. The CO2 capture efficiency of CaAl(95) was also higher than that of the un-modified CaO adsorbent. With an empty bed residence time of 0.0074 sec, the CO2 capture efficiency was 63-74% over 20 cyclic adsorption tests. This is an abstract of a paper presented at the 101st AWMA Annual Conference and Exhibition (Portland, OR 6/24-27/2008).

Original languageEnglish
Title of host publication101st Air and Waste Management Association Annual Conference and Exhibition 2008
Pages1765-1769
Number of pages5
StatePublished - 1 Dec 2008
Event101st Air and Waste Management Association Annual Conference and Exhibition 2008 - Portland, OR, United States
Duration: 24 Jun 200827 Jun 2008

Publication series

NameProceedings of the Air and Waste Management Association's Annual Conference and Exhibition, AWMA
Volume3
ISSN (Print)1052-6102

Conference

Conference101st Air and Waste Management Association Annual Conference and Exhibition 2008
CountryUnited States
CityPortland, OR
Period24/06/0827/06/08

Keywords

  • Adsorbent
  • CaO
  • CO capture
  • Greenhouse gas
  • Limestone

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