About AAQR

Aims and Scope

Articles online
For contributors
Call for Papers
Guideline for the
Special Issue Proposal
Subscription
Information

Advertising

Contact Us
 
Search for  in   Search  Advanced search  

 

Volume 16, No. 4, April 2016, Pages 1093-1103 PDF(336 KB)  
doi: 10.4209/aaqr.2015.05.0298   

Chemical Looping Gasification of Charcoal with Iron-Based Oxygen Carriers in an Annular Dual-Tube Moving Bed Reactor

Hsuan-Chih Wu, Young Ku

Department of Chemical Engineering, National Taiwan University of Science and Technology, No.43, Sec. 4, Keelung Rd., Da’an Dist., Taipei 106, Taiwan

 

Highlights
  • Fe2O3/Al2O3 oxygen carriers was prepared and provided with applicable performance.
  • A moving bed reactor was employed as fuel reactor using iron-based oxygen carriers.
  • More CO and H2 were generated for charcoal gasification with steam/CO2 mixture.
  • FeO was observed in the reacted oxygen carriers out of the reactor.
  • Roughly 60% of output processing capacity was released for charcoal gasification.

Abstract

 

Charcoal used as solid fuel for chemical looping gasification (CLG) with Fe2O3/Al2O3 oxygen carriers was investigated in an annular dual-tube moving bed reactor (ADMBR). Pure CO2 and steam/CO2 mixture were used to gasify the charcoal in a fixed bed reactor. More combustible gases, CO and H2, were observed in the outlet gas streams for charcoal gasification conducted with steam/CO2 mixture than those with only CO2. The yields of fuel gases were determined to modify the equation of oxygen carrier-to-fuel ratio (ϕ) for moving bed operation. More CO and H2 were generated for charcoal gasification conducted in the moving bed reactor operated with higher oxygen carrier-to-fuel ratios. The heat demand for experiment conducted in the ADMBR was calculated to be 60% of output processing capacity due to the heat consumptions of fuel gasification. In sum, ADMBR is technically feasible to be a fuel reactor for partial oxidization of charcoal by CLG to achieve syngas production under appropriate operating conditions without auxiliary fuel.

 

 

Keywords: Chemical looping gasification (CLG); Char gasification; Fe2O3/Al2O3 composite oxygen carrier; Moving bed reactor.

 

 

Copyright © 2009-2014 AAQR All right reserved.