Methanation of CO2Over Nanostructured Cobalt‐Actinide Bimetallic Oxides

Author:

Ferreira Ana C.1ORCID,Branco Joaquim B.12,Martinho Joana F.1,Ferraria Ana M.34,Botelho de Rego Ana M.34,Ferreira Machado I.345,Vieira Ferreira L. F.34

Affiliation:

1. Centro de Química Estrutural Institute of Molecular Sciences Instituto Superior Técnico Universidade de Lisboa Campus Tecnológico e Nuclear 2695-066 Bobadela Portugal

2. Departamento de Engenharia e Ciências Nucleares Instituto Superior Técnico Universidade de Lisboa Campus Tecnológico e Nuclear 2695-066 Bobadela Portugal

3. BSIRG-iBB-Institute for Bioengineering and Biosciences Universidade de Lisboa Lisboa 1049-001 Lisbon Portugal

4. Associate Laboratory i4HB Institute for Health and Bioeconomy at Instituto Superior Técnico Universidade de Lisboa 1049-001 Lisboa Portugal

5. Polytechnic Institute of Portalegre P-7300-110 Portalegre Portugal

Abstract

AbstractNanostructured Cobalt‐Actinide (An=Th, U) bimetallic oxides were for the first time prepared by the epoxide addition method and electrospinning technique aiming the synthesis of aerogels and nanofibers, respectively. Tested as catalysts for the methanation of CO2and regardless of the actinide element, the yield and selectivity towards CH4are high (>40 and 95 %, respectively), which was explained by their physicochemical properties such as reducibility and basicity and the existence of a synergic effect between cobalt and actinide species. The aerogels present the best catalytic behavior, namely those with thorium and the catalytic activity increases with the Co/An molar ratio. Both aerogels and nanofibers also present a high resistance to deactivation for at least 75 h in the gaseous stream, which is an advantage for any catalytic application. Moreover, at 300 °C they are 2 to 4 times more active than two reference catalysts (5wt %Rh/Al2O3and NiO/Al2O3) tested in the same conditions, which to our best knowledge is a significant result.

Publisher

Wiley

Subject

Inorganic Chemistry,Organic Chemistry,Physical and Theoretical Chemistry,Catalysis

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