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Title: Nanocomposite oxygen carriers for chemical-looping combustion of sulfur-contaminated synthesis gas

Abstract

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.

Authors:
;  [1]
  1. United States Department of Energy, Pittsburgh, PA (United States). National Energy Technology Laboratory
Publication Date:
OSTI Identifier:
21261671
Resource Type:
Journal Article
Journal Name:
Energy and Fuels
Additional Journal Information:
Journal Volume: 23; Journal Issue: 10; Journal ID: ISSN 0887-0624
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; NANOSTRUCTURES; COMPOSITE MATERIALS; COMBUSTION; REDOX REACTIONS; SULFUR; SYNTHESIS GAS; CERAMICS; METALS; HYDROGEN SULFIDES; NICKEL; COPPER; SULFIDATION

Citation Formats

Solunke, Rahul D, and Veser, Goetz. Nanocomposite oxygen carriers for chemical-looping combustion of sulfur-contaminated synthesis gas. United States: N. p., 2009. Web. doi:10.1021/ef900280m.
Solunke, Rahul D, & Veser, Goetz. Nanocomposite oxygen carriers for chemical-looping combustion of sulfur-contaminated synthesis gas. United States. https://doi.org/10.1021/ef900280m
Solunke, Rahul D, and Veser, Goetz. 2009. "Nanocomposite oxygen carriers for chemical-looping combustion of sulfur-contaminated synthesis gas". United States. https://doi.org/10.1021/ef900280m.
@article{osti_21261671,
title = {Nanocomposite oxygen carriers for chemical-looping combustion of sulfur-contaminated synthesis gas},
author = {Solunke, Rahul D and Veser, Goetz},
abstractNote = {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.},
doi = {10.1021/ef900280m},
url = {https://www.osti.gov/biblio/21261671}, journal = {Energy and Fuels},
issn = {0887-0624},
number = 10,
volume = 23,
place = {United States},
year = {2009},
month = {9}
}