Particle size effect in the low temperature reforming of methane by carbon dioxide on silica-supported Ni nanoparticles

• DOI: 10.1016/j.jcat.2012.09.011
• Publication Date: 2012-10-31T00:31:32Z
• Authors: David Baudouin; Uwe Rodemerck; Frank Krumeich; Aimery de Mallmann; Kaï C. Szeto; Hervé Ménard; Laurent Veyre; Jean-Pierre Candy; Paul B. Webb; Chloé Thieuleux; Christophe Copéret
• Keywords: /dk/atira/pure/subjectarea/asjc/1600/1606; Carbon dioxide reforming of methane; 540; 7. Clean energy; 01 natural sciences; Particle size effect; 0104 chemical sciences; Nickel nanoparticles; 13. Climate action; Silica-supported; name=Catalysis; /dk/atira/pure/subjectarea/asjc/1500/1503; name=Physical and Theoretical Chemistry

Abstract The influence of nickel particle size in the range of 1.6–7.3 nm on catalyst performance in low temperature CO 2 reforming of methane reaction has been investigated using well-defined catalysts based on a neutral silica support. XAS and XPS studies indicated a reduction degree greater than 90%. The intrinsic Ni/SiO 2 performances were found to be independent of nickel particle size in dry reforming at 773 K using a CH 4 /CO 2 ratio of 1.3 at 1 atm, both at an early stage and in steady state conditions. The H 2 /CO ratio was also found to be structure in sensitive but is controlled by thermodynamics through the faster reverse water gas shift reaction.