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Innovative Energy & Research | ISSN: 2576-1463 | Volume 7
Renewable Energy and Resources
Energy Materials and Fuel Cell Research
2
nd
International Conference on
&
August 27-28, 2018 | Boston, USA
Development of new bi-functional dense ceramic-carbonate membrane reactors for CO oxidation
and subsequent CO
2
permeation
Pedro Sanchez-Camacho, Oscar Ovalle-Encinia
and
Heriberto Pfeiffer
National Autonomous University of Mexico, Mexico
G
as separation processes have become one of the most promising strategies for different industrial applications; carbon
dioxide (CO
2
) and carbon monoxide (CO) separation among them. Within this context, syngas is composed of hydrogen
and carbon oxides, and it is usually produced at high temperatures. Therefore, H
2
enrichment, through the carbon oxides
separation is of great interest. On CO
2
separation, different membrane systems have been developed, including zeolites,
polymers, and ceramics. Especially, the so-called dense dual-phase membranes have shown very interestingly CO
2
separation
properties at high temperatures. This kind of membrane systems is produced by a porous solid support infiltrated with molten
carbonates, where ceramic supports must ideally have oxygen ionic and electronic conductive properties. CO
2
permeation
is performed by the reaction of oxygen ions from the ceramic oxide with the CO
2
present on the upstream side, producing
carbonate ions, which diffuse through the molten carbonate phase due to CO
2
partial pressure gradients on both membrane
sides. CO
2
is desorbed on the downstream side through the reversible decarbonation process and swept from the surface.
Oxygen ions are reincorporated and diffused on the ceramic phase as a consequence of decarbonization. Since perovskites have
good ionic-electronic conduction properties, some of them have been incorporated to dense ceramic-carbonate membranes,
increasing CO
2
permeation. In this work, a composite (doped ceria and perovskite) was synthesized, sintered and infiltrated
with molten carbonates, showing that it is able to perform both processes; the CO oxidation at the surface and subsequent CO
2
permeation through the molten carbonate phase. CO conversion and CO
2
recovery efficiencies were 39.6 and 64.6% at 900 °C,
respectively. Moreover, results in evidence that the perovskite phase importantly improve the oxygen permeation from sweep
to feed side (inverse permeation), enhancing CO oxidation and CO
3
2-
formation, without releasing oxygen on the feed side.
Biography
Pedro Sanchez-Camacho received a Chemistry´s degree from the Universidad Nacional Autónoma de Mexico (UNAM) in 2012. Later, he obtained a master´s de-
gree in Material Science and Engineering in same University. Nowadays, he studies a PhD in a Materials Science and Engineering focusing in the development of
ceramic oxide membranes in order to separate CO2 from a gas mixture. He is especially interested in solid state chemistry, ceramic synthesis, sorption processes
on ceramics, catalysis, inorganic membranes for gas separation and solid oxide fuel cells (SOFC´s). As part of his work, some papers have been published on
referred journals such as Journal of Physical Chemistry and Journal of Energy Chemistry, among others.
pedsacam@gmail.comPedro Sanchez-Camacho et al., Innov Ener Res 2018, Volume 7
DOI: 10.4172/2576-1463-C2-006