Hydrotalcite-derived copper-based oxygen carrier materials for efficient chemical-looping combustion of solid fuels with CO2 capture
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
Chemical-looping combustion (CLC) is a promising technology that utilizes metal oxides as oxygen carriers for the combustion of fossil fuels to CO2 and H2O, with CO2 readily sequestrated after the condensation of steam. Thermally stable and reactive metal oxides are desirable as oxygen carrier materials for the CLC processes. Here, we report the performance of Cu-based mixed oxides derived from hydrotalcite (also known as layered double hydroxides) precursors as oxygen carriers for the combustion of solid fuels. Two types of CLC processes were demonstrated, including chemical looping oxygen uncoupling (CLOU) and in situ gasification (iG-CLC) in the presence of steam. The Cu-based oxygen carriers showed high performance for the combustion of two solid fuels (a lignite and a bituminous coal), maintaining high thermal stability, fast reaction kinetics, and reversible oxygen release and storage over multiple redox cycles. Slight deactivation and sintering of the oxygen carrier occurred after redox cycles at an very high operation temperature of 985 °C. We expect that our material design strategy will inspire the development of better oxygen carrier materials for a variety of chemical looping processes for the clean conversion of fossil fuels with efficient CO2 capture.
Date Issued
2022-09-15
Date Acceptance
2022-08-19
Citation
Energy and Fuels, 2022, 36 (18), pp.11062-11076
ISSN
0887-0624
Publisher
American Chemical Society
Start Page
11062
End Page
11076
Journal / Book Title
Energy and Fuels
Volume
36
Issue
18
Copyright Statement
© 2022 The Authors. Published by American Chemical Society. This work is published under CC BY 4.0 International licence.
License URL
Sponsor
Commission of the European Communities
Engineering & Physical Science Research Council (E
Imperial College London
Identifier
https://pubs.acs.org/doi/10.1021/acs.energyfuels.2c02409
Grant Number
851272
Bth Ref: RC-CE1204
Subjects
Science & Technology
Technology
Energy & Fuels
Engineering, Chemical
Engineering
LAYERED DOUBLE HYDROXIDES
IN-SITU GASIFICATION
UNCOUPLING CLOU
SHAPE CHANGES
COAL
PRECURSORS
SEPARATION
CONVERSION
BIOMASS
NANOPARTICLES
Energy
0306 Physical Chemistry (incl. Structural)
0904 Chemical Engineering
0914 Resources Engineering and Extractive Metallurgy
Publication Status
Published
Date Publish Online
2022-08-26