Development of silica-gel-supported polyethylenimine sorbents for CO 2 capture from flue gas

Zhonghua Zhang, Xiaoliang Ma, Dongxiang Wang, Chunshan Song, Yonggang Wang

Research output: Contribution to journalArticlepeer-review

70 Scopus citations

Abstract

In order to reduce the sorbent preparation cost and improve its volume-based sorption capacity, the use of an inexpensive and commercially available silica gel was explored as a support to prepare a solid polyethylenimine sorbent (PEI/SG) for CO 2 capture from flue gas. The effects of the pore volume and particle size of the silica gels, molecular weight of polyethylenimine and amount of polyethylenimine loaded, sorption temperature and moisture in the flue gas on the CO 2 sorption capacity of PEI/SG were examined. The sorption performance of the developed PEI/SG was evaluated by using a thermogravimetric analyzer and a fixed-bed flow sorption system in comparison with the SBA-15-supported polyethylenimine sorbent (PEI/SBA-15). The best PEI/SG sorbent showed a mass-based CO 2 sorption capacity of 138 mg-CO 2/g-sorbent, which is almost the same as that of PEI/SBA-15. In addition, the PEI/SG gave a high volume-based sorption capacity of 83 mg-CO 2/cm 3-sorbent, which is higher than that of PEI/SBA-15 by a factor of 2.6.

Original languageEnglish (US)
Pages (from-to)2495-2502
Number of pages8
JournalAIChE Journal
Volume58
Issue number8
DOIs
StatePublished - Aug 1 2012

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Environmental Engineering
  • Chemical Engineering(all)

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