Fly Ash Derived Lithium Silicate for in-situ Pre-combustion CO2 Capture

A. Sanna, S. Thompson, K. J. Whitty, M. M. Maroto-Valer

Research output: Contribution to journalArticle

7 Citations (Scopus)
31 Downloads (Pure)

Abstract

Steam gasification process converts biomass into a mixture of CO, CO2, CH4, and H2. In this work, a fly ash derived lithium silicate material (Li-FA) was tested for the removal of CO2 using simulated syngas at low gasification temperature. The CO2 uptake tests were carried out using a high-pressure thermogravimetric system at 380 °C and 500 °C, 15 bar and simulating a synthetic biomass derived syngas mixture. The tests confirmed that the material is able to selectively absorb CO2 at 380 °C (1.2 mmol CO2 / g sorbent) and 500 °C (2.77 mmol/g) and in presence of 50% H2O, 30% H2, 20% CO2 at 15 bar. However, only 75% of the adsorbed CO2 was desorbed under the same capture temperatures and 15 bar, by switching the reactor atmosphere from CO2 to N2. This suggests that a pressure swing process or a higher desorption temperature are required for complete desorption.

Original languageEnglish
Pages (from-to)2401-2404
Number of pages4
JournalEnergy Procedia
Volume114
DOIs
Publication statusPublished - 1 Jul 2017
Event13th International Conference on Greenhouse Gas Control Technologies 2016 - SwissTech Convention Center, Lausanne, Switzerland
Duration: 14 Nov 201618 Nov 2016
http://www.ghgt.info/ghgt-13 (Conference website)

Keywords

  • biomass
  • carbonation
  • CO capture
  • Li-based sorbents
  • sorption-enhanced gasification

ASJC Scopus subject areas

  • Energy(all)

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