The CO/H2 reaction on Rh/Al2O3I. Steady-state and transient kinetics
1989; Elsevier BV; Volume: 120; Issue: 1 Linguagem: Inglês
10.1016/0021-9517(89)90255-8
ISSN1090-2694
Autores Tópico(s)Catalysis and Hydrodesulfurization Studies
ResumoVarious hydrogen titrations yield the surface composition of RhAl2O3 during the COH2 reaction at temperatures in the range 180–260 °C. There is a very small amount of active carbon Ca, 0.02–0.06 monolayer, and 0.70–0.98 monolayer of CO on the metal surface. The coverage of H is low. Also present are inactive carbon Cβ on the metal and formate species on the support. The surface coverages are consistent with the observed steady-state kinetics, which result in methane as the predominant product. Although the rate-limiting step may be the dissociation of surface CO, it is found that the reaction sequence passes through a small coverage of highly active surface carbon Cα
Referência(s)