Integrating desulfurization with CO2-capture in chemical-looping combustion

Journal Article · Tue Feb 01 04:00:00 EST 2011 · Fuel

DOI:https://doi.org/10.1016/j.fuel.2010.09.039· OSTI ID:1053190

Solunke, Rahul D.; Veser, Götz

Chemical looping combustion (CLC) is an emerging technology for clean combustion. We have previously demonstrated that the embedding of metal nanoparticles into a nanostructured ceramic matrix can result in unusually active and sinter-resistant nanocomposite oxygen carrier materials for CLC which maintain high reactivity and high-temperature stability even when sulfur contaminated fuels are used in CLC. Here, we propose a novel process scheme for in situ desulfurization of syngas with simultaneous CO{sub 2}-capture in chemical looping combustion by using these robust nanocomposite oxygen carriers simultaneously as sulfur-capture materials. We found that a nanocomposite Cu-BHA carrier can indeed strongly reduce the H{sub 2}S concentration in the fuel reactor effluent. However, during the process the support matrix is also sulfidized and takes part in the redox process of CLC. This results in SO{sub 2} production during the reduction of the oxygen carrier and thus limits the degree of desulfurization attainable with this kind of carrier. Nevertheless, the results suggest that simultaneous desulfurization and CO{sub 2} capture in CLC is feasible with Cu as oxygen carrier as long as appropriate carrier support materials are chosen, and could result in a novel, strongly intensified process for low-emission, high efficiency combustion of sulfur contaminated fuel streams.

• Research Organization: National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV, and Albany, OR (United States)
• Sponsoring Organization: USDOE Office of Fossil Energy (FE)
• DOE Contract Number: FE0004000
• OSTI ID: 1053190
• Report Number(s): TPR-3137
• Journal Information: Fuel, Journal Name: Fuel Journal Issue: 2 Vol. 90; ISSN 0016-2361
• Country of Publication: United States
• Language: English

Related Subjects

10 SYNTHETIC FUELS
CO{sub 2} capture
Chemical looping combustion
Desulfurization
Process intensification