Process simulation of multi-stage chemical-looping combustion using Aspen Plus

William X. Meng, Subhodeep Banerjee, Xiao Zhang and Ramesh K. Agarwal

Energy, 2015, vol. 90, issue P2, 1869-1877

Abstract: In recent years, Chemical-looping combustion (CLC) is increasingly being considered as a promising technology to increase the efficiency of carbon capture in coal-fired power plants and for reducing CO2 emissions into the atmosphere. The char gasification step required in the CLC process when using solid fuels such as coal is slow and often incomplete, which limits the rate of fuel conversion. The concept of multi-staged fuel reaction is proposed as an improvement to the original CLC concept to address this issue. System-level simulations of the single-stage, two-stage and four-stage CLC processes are conducted in Aspen Plus using a plug flow reactor model for the gasification step to incorporate the reaction kinetics into the simulation. By varying the reactor size and examining the char conversion and net energy output, the optimum reactor size for each multi-stage configuration is determined. The effect of multi-staging on the exhaust composition is also investigated. The results of the simulations show that multi-staging allows the use of multiple smaller reactors with the same total volume without incurring any penalty on the net energy output.

Keywords: Aspen Plus simulation; Carbon capture; Chemical-looping combustion; Multi-stage combustion (search for similar items in EconPapers)
Date: 2015
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (10)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S036054421500910X
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:90:y:2015:i:p2:p:1869-1877

DOI: 10.1016/j.energy.2015.06.139

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().