Novel technique route of coal gasification with Co 2 capture using Cao sorbents via three-stage interconnected fluidized beds

Hao Zhao, Guohui Song, Laihong Shen, Yuanyuan Yu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

15 Citations (Scopus)

Abstract

To modify the temperature mismatch between coal gasification and CO 2 capture in one gasifer, a novel technique route of coal gasification with CO 2 capture via three-stage interconnected fluidized beds (ICFB) was proposed. The three-stage ICFB consisted of a gasifier, an adsorber, and a calcinator, which separated the coal gasification, CO 2 capture, and sorbents regeneration. Also, it could keep the three processes performing at the rational reaction temperatures. A process simulation was constructed on the basis of the chemical and phase equilibrium method using Aspen Plus, and the effects of the adsorption temperature and the steam/coal ratio on adsorption products composition, CO 2 capture efficiency, H 2 yield, and carbon conversion ratio were investigated. The results indicate the adsorption temperature range 600-630 °C and the steam/coal mass ratio range 2.1-2.7 are the possible optimal reaction conditions. The modified process shows an optimal coal gasification with increasing H 2 concentration of 32.60% and capturing CO 2 efficiency of 85.17%, compared with the coal gasification with CO 2 capture in one gasifier.

Original languageEnglish
Pages (from-to)2934-2941
Number of pages8
JournalEnergy and Fuels
Volume26
Issue number5
DOIs
Publication statusPublished - 17 May 2012
Externally publishedYes

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology

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