Sulfur behavior in chemical-looping combustion using a copper ore oxygen carrier

Kun Wang, Xin Tian and Haibo Zhao

Applied Energy, 2016, vol. 166, issue C, 84-95

Abstract: Chemical-looping combustion (CLC) is a promising technology that provides a novel route for CO2 capture with low cost and energy penalty. Interaction between the oxygen carrier and sulfur contaminants in fuel is a significant concern in chemical looping systems, which will degrade the captured CO2 purity and even affect the reactivity of oxygen carrier. Experiments of a sulfur-containing synthesis gas (4000ppm H2S, 25vol.% H2, 35vol.% CO, and 39.6vol.% CO2) as fuel and copper ore as oxygen carrier were performed by thermogravimetric analysis and Fourier transform infrared spectroscopy (TGA–FTIR). The effects of reducing atmosphere, temperature and redox cycle number were studied. A weight gain was observed in all TGA experiments with 4000ppm H2S synthesis gas as fuel, due to the sulfidation of the copper ore oxygen carrier. For the reaction of copper ore with H2S-containing synthesis gas, the main metal sulfide products were Cu2S and FeS, while the gaseous sulfur species were mainy SO2, COS, and CS2. H2S was easier to react with copper oxides than iron oxides. Moreover, the sulfidation of copper ore was further investigated in a laboratory scale fluidized bed reactor at 900°C, using copper ore as oxygen carrier and synthesis gases with/without H2S as fuel. The results showed that the sulfidation of copper ore degraded its oxygen transport capicity and reactivity to some extent.

Keywords: CO2 capture; Chemical-looping combustion (CLC); Copper ore; Sulfur (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0306261916000301
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:166:y:2016:i:c:p:84-95

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.2016.01.011

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 ().