Chemical looping combustion of hard coal in a 1MWth pilot plant using ilmenite as oxygen carrier

Jochen Ströhle, Matthias Orth and Bernd Epple

Applied Energy, 2015, vol. 157, issue C, 288-294

Abstract: The application of chemical looping combustion (CLC) for capturing CO2 from coal-fired power plants has the potential of very low efficiency penalty and low CO2 avoidance costs compared with first generation CO2 capture technologies. One important step towards commercial application is the demonstration of the technology in autothermal operation in the scale of 1MWth fuel power. This study presents results of a test campaign in a 1MWth CLC plant with hard coal as fuel and ilmenite as oxygen carrier. The results of a six hours period with two hours of constant coal feeding of 0.5MWth are studied in detail. The fuel reactor was fluidized with steam and CO2, and the start-up propane burner was still in operation at minimum load. The overall air ratio in the fuel reactor was around 0.1. This indicates that the solids circulation was slightly too low to keep the fuel reactor temperature at 900°C. The measured gas concentrations at the fuel reactor exit show that it was possible to gasify coal and to convert the main part of the gasification products by the ilmenite. The oxygen demand was around 20%, which is in line with the experience from the Chalmers 100kWth test rig. The air reactor had to be heated by additional combustion of propane, most probably because the inventory of the air reactor was very low leading to low conversion rates of ilmenite. Hence, autothermal operation was not reached. Improved results can be expected by an increase of the solids inventory in the reactors and by an increase of solids circulation.

Keywords: Chemical looping; Combustion; Carbon capture; Coal; Ilmenite; Pilot plant (search for similar items in EconPapers)
Date: 2015
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (26)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S030626191500793X
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:appene:v:157:y:2015:i:c:p:288-294

Ordering information: This journal article can be ordered from
http://www.elsevier.com/wps/find/journaldescription.cws_home/405891/bibliographic
http://www.elsevier. ... 405891/bibliographic

DOI: 10.1016/j.apenergy.2015.06.035

Access Statistics for this article

Applied Energy is currently edited by J. Yan

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