Partial oxidation of methane on neodymium and lanthanium chromate based perovskites for hydrogen production

Author(s)

Roseno, K. T. de C. ^[1] ; Schmal, M. ^{[1, 2]} ; Brackmann, R. ^[3] ; Alves, R. M. B. ^[1] ; Giudici, R. ^[1]

Affiliation

^[1] Univ Sao Paulo, Dept Chem Engn, Polytech Sch, Ave Prof Lineu Prestes 580, Bl 18, BR-05508000 Sao Paulo, SP - Brazil

^[2] Univ Fed Rio de Janeiro, UFRJ, Dept Chem Engn, Ave Horacio Macedo 2030, CP 68502, BR-21941914 Rio De Janeiro, RJ - Brazil

^[3] Fed Univ Technol Parana UTFPR, Dept Chem, Via Conhecimento, Km 01, CP 571, BR-85503390 Pato Branco, PR - Brazil

• Document type: Journal article
• Source: INTERNATIONAL JOURNAL OF HYDROGEN ENERGY; v. 44, n. 16, p. 8166-8177, MAR 29 2019.
• Web of Science Citations: 4

Abstract

Perovskite-type mixed oxides LaCrO3 and Nd0.95CrO3 were synthesized by the polymerization complex method. The perovskites were characterized by different techniques aiming to evaluate the influence of the non-stoichiometry and the nature of site A on the catalytic properties for the POM reaction. The non-stoichiometry and A sites did not affect the methane conversion, but the selectivity. The methane conversion with the neodymium catalyst Nd0.95CrO3 (N95) was 34%, and of the mixed La0.95CrO3 (L95) catalyst 38%, under these conditions. The rate of the Nd0.95CrO3 (N95) perovskite was equal to 3.50 mol.g(-1).h(-1) at 700 degrees C, which suggests higher activity compared to cobaltate perovskites. Although the hydrogen selectivity was similar the selectivity to CO and CO2 were different. Catalysts did not suffer structure changes during the POM reaction and negligible deactivation. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 14/00833-5 - Visiting Researcher Prof. Martin Schmal
• Grantee: Reinaldo Giudici
• Support Opportunities: Research Grants - Visiting Researcher Grant - Brazil
• FAPESP's process: 14/50279-4 - Brasil Research Centre for Gas Innovation
• Grantee: Julio Romano Meneghini
• Support Opportunities: Research Grants - Research Centers in Engineering Program