Nanocomposite oxygen carriers for chemical-looping combustion of sulfur-contaminated synthesis gas
- United States Department of Energy, Pittsburgh, PA (United States). National Energy Technology Laboratory
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 combine the high reactivity of metals with the high-temperature stability of ceramics. In the present study, we investigate the effect of H{sub 2}S in a typical coal-derived syngas on the stability and redox kinetics of Ni- and Cu-based nanostructured oxygen carriers. Both carriers show excellent structural stability and only mildly changed redox kinetics upon exposure to H{sub 2}S, despite a significant degree of sulfide formation. Surprisingly, partial sulfidation of the support results in a strong increase in oxygen carrier capacity in both cases because of the addition of a sulfide-sulfate cycle. Overall, the carriers show great potential for use in CLC of high-sulfur fuels. 21 refs., 13 figs. 1 tab.
- OSTI ID:
- 21261671
- Journal Information:
- Energy and Fuels, Vol. 23, Issue 10; ISSN 0887-0624
- Country of Publication:
- United States
- Language:
- English
Similar Records
Sulfur behavior in chemical looping combustion with NiO/Al{sub 2}O{sub 3} oxygen carrier
Chemical-looping combustion of coal-derived synthesis gas over copper oxide oxygen carriers