Improving coal gasification with in situ CO2 capture by pressurization in interconnected fluidized beds

Hao Zhao, Guohui Song, Laihong Shen, Boyang Shen, Hui An

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

Abstract

The technical route of coal gasification with in situ CO2 capture using CaO sorbents was proposed via interconnected fluidized beds (ICFB) system, however, the defect of mismatch between the optimal coal gasification temperature and the optimal sorbents carbonation temperature limited the application. This paper modified the mentioned defect by pressurization. The coal gasification process with CO2 capture was simulated using Aspen Plus. It was analyzed that the effects of gasification temperature, pressure, sorbents/coal ratio on gasification products composition, CO2 capture efficiency. The effect of different bed materials was also discussed. The results indicates the pressure range of 0.7-0.9 MPa with the gasification temperature range of 740-760°C is favorable considering the match of coal gasification and sorbents carbonation temperature. Moreover, the optimal sorbent/coal ratio is about 0.38 under the condition above. The use of CaO sorbents reduces the CO2 concentration in the exit of the gasifier about 53.53%, as well as partly promotes coal gasification degree and H2 yield, compared to quartz sands.

Original languageEnglish
Title of host publicationAPPEEC 2012 - 2012 Asia-Pacific Power and Energy Engineering Conference, Proceedings
DOIs
Publication statusPublished - 2012
Externally publishedYes
Event2012 Asia-Pacific Power and Energy Engineering Conference, APPEEC 2012 - Shanghai, China
Duration: 27 Mar 201229 Mar 2012

Publication series

NameAsia-Pacific Power and Energy Engineering Conference, APPEEC
ISSN (Print)2157-4839
ISSN (Electronic)2157-4847

Conference

Conference2012 Asia-Pacific Power and Energy Engineering Conference, APPEEC 2012
Country/TerritoryChina
CityShanghai
Period27/03/1229/03/12

Keywords

  • CaO sorbents
  • CaO/coal ratio
  • coal gasification
  • in situ CO capture
  • interconnected fluidized beds
  • pressurization

ASJC Scopus subject areas

  • Energy Engineering and Power Technology

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