SURFACE SPECIES ON Rh/Al2O3 DURING CO/H2 REACTION STUDIED BY TRANSIENT TECHNIQUES

摘要: Methanation of a 9/1 mixture H2/CO at 180°C has been studied by transient techniques in gradientless microreactor, The use isotopic and temperature programmed reduction (TPR) made possible the measurement adsorbed CO, reactive carbon Cα an inactive Cβ. As little as 0.04-0.06 monolayers heterogeneous layer are present under reaction conditions studied. About monolayer CO is 180°C, independent time on stream synthesis gas. Cβ species accumulates slowly with increasing gas even low 180°C. In addition, appreciable amounts formate observed, exceeding located alumina support. does not appear to be pathway from CH4. rate essentially controlled dissociation surface CO.