Gregory Etchegoyen

Foam-supported catalysts tailored for industrial steam reforming processes

Abstract Alumina foams coated with Rh/MgAl 2 O 4 spinel active phases have been produced to be used as catalysts in steam reforming processes with improved thermal transfers and limited pressure drops. Those foam-supported catalysts are here fully characterised before and after aging in water-rich atmosphere at elevated temperatures. It is shown that they are stable at any architectural scale: macro- (foam), micro- (coating) and nano- (Rh active phase) structures. Such catalysts are then very promising catalytic loads to be further implemented in industrial units instead of standard loads.

Mixed-Conducting Perovskite Reactor for High-Temperature Applications: Control of Microstructure and Architecture

High-temperature applications of perovskite-type membrane reactors require improved material performances and operational stability. The reactor microstructure and architecture controls were found to be crucial for thermo-mechanical integrity and oxygen permeation kinetics. A multilayer reactor was developed, using second-phase particles to control its microstructure and a co-sintering process to control its architecture.