Combined oxides as oxygen-carrier material for chemical-looping with oxygen uncoupling
Journal article, 2014

Oxygen-carrier materials for chemical-looping with oxygen uncoupling (CLOU) must be capable of taking up and releasing gas-phase O2 at conditions relevant for generation of heat and power. In principle, the capability of a certain material to do so is determined by its thermodynamic properties. This paper provides an overview of the possibility to design feasible oxygen carrier materials from combined oxides, i.e. oxides with crystal structures that include several different cations. Relevant literature is reviewed and the thermodynamic properties and key characteristics of a few selected combined oxide systems are calculated and compared to experimental data. The general challenges and opportunities of the combined oxide concept are discussed. The focus is on materials with manganese as one of its components and the following families of compounds and solid solutions have been considered: (MnyFe1-y)Ox, (MnySi1-y)Ox, CaMnO3-δ,(NiyMn1-y)Ox, (MnyCu1-y)Ox and (MnyMg1-y)Ox. In addition to showing promise from a thermodynamic point of view, reactivity data from experimental investigations suggests that the rate of O2 release can be high for all systems. Thus these combined oxides could also be very suitable for practical application.

Chemical-looping combustion

Chemical-looping with oxygen uncoupling

Combined oxides

Mixed oxides

Manganese

Author

Magnus Rydén

Chalmers, Energy and Environment, Energy Technology

Henrik Leion

Chalmers, Chemical and Biological Engineering, Environmental Inorganic Chemistry

Tobias Mattisson

Chalmers, Energy and Environment, Energy Technology

Anders Lyngfelt

Chalmers, Energy and Environment, Energy Technology

Applied Energy

0306-2619 (ISSN)

Vol. 113 1924-1932

Driving Forces

Sustainable development

Subject Categories

Energy Engineering

Other Chemical Engineering

Areas of Advance

Energy

DOI

10.1016/j.apenergy.2013.06.016

More information

Created

1/24/2018