Hydrogen purification of actual syngas streams for energy applications: Au-Cu supported over nano-shaped CeO2 as stable catalysts for the carbon monoxide removal
Por:
Cifuentes, Bernay, Bustamante, Felipe, Araiza, Daniel G., Diaz, Gabriela, Cobo, Martha
Publicada:
25 may 2020
Resumen:
Nano-shaped CeO2 (i.e., polyhedra, rods and cubes) and CeO2 without
defined morphology were compared as supports of AuCu/CeO2 catalysts in
the CO removal of actual syngas streams. Catalyst characterization
indicates that oxygen vacancies, exposed CeO2 crystal planes, surface
area and the interaction between active metals and support translate
into changes in the catalytic performance on each nano-shape of CeO2.
CeO2 nano-polyhedra and nano-rods show the higher activity and
selectivity due to their high surface area and the presence of both
{111 and {100 lattice planes. However, nano-rods are susceptible
of losing CO2-selectivity under continuous operation due to the presence
of an additional and unstable {110 lattice plane. Therefore, an AuCu
catalyst supported on nano-polyhedra CeO2 ensures complete CO removal
(i.e., < 100 ppm) from an actual syngas stream for 48 h. These results
are a contribution to the development of a simple, continuous and robust
system for fuel-cell grade H-2 production.
Filiaciones:
Cifuentes, Bernay:
Energy, Materials and Environment Laboratory, Chemical Engineering Department, Universidad de La Sabana, Campus Universitario Puente del Común, Km. 7 Autopista Norte, Bogotá, Colombia
Environmental Catalysis Laboratory, Chemical Engineering Department, Universidad de Antioquia UdeA, Calle 70 No. 52 - 21, Medellín, Colombia
Univ La Sabana, Chem Engn Dept, Energy Mat & Environm Lab, Campus Univ Puente Comun,Km 7 Autopista Norte, Bogota, Colombia
Univ Antioquia UdeA, Chem Engn Dept, Environm Catalysis Lab, Calle 70 52-21, Medellin, Colombia
Bustamante, Felipe:
Environmental Catalysis Laboratory, Chemical Engineering Department, Universidad de Antioquia UdeA, Calle 70 No. 52 - 21, Medellín, Colombia
Univ Antioquia UdeA, Chem Engn Dept, Environm Catalysis Lab, Calle 70 52-21, Medellin, Colombia
Araiza, Daniel G.:
Instituto de Física, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica s/n, Cd. Universitaria, Ciudad de México, 04510, Mexico
Univ Nacl Autonoma Mexico, Inst Fis, Circuito Invest Cient S-N, Mexico City 04510, DF, Mexico
Diaz, Gabriela:
Instituto de Física, Universidad Nacional Autónoma de México, Circuito de la Investigación Científica s/n, Cd. Universitaria, Ciudad de México, 04510, Mexico
Univ Nacl Autonoma Mexico, Inst Fis, Circuito Invest Cient S-N, Mexico City 04510, DF, Mexico
Cobo, Martha:
Energy, Materials and Environment Laboratory, Chemical Engineering Department, Universidad de La Sabana, Campus Universitario Puente del Común, Km. 7 Autopista Norte, Bogotá, Colombia
Univ La Sabana, Chem Engn Dept, Energy Mat & Environm Lab, Campus Univ Puente Comun,Km 7 Autopista Norte, Bogota, Colombia
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