Methylcyclopentane reactions on Rh Ge/Al2O3 catalysts prepared by controlled surface reaction

摘要: Abstract The reaction mechanism of methylcyclopentane (MCP) ring-opening on Rh catalysts (the participation each intermediate in further hydrogenolysis versus their desorption) was studied a special series Rh(Ge)/Al 2 O 3 catalysts. These were obtained by wet impregnation and adding different amounts Ge anchoring Ge( n -C 4 H 9 ) the surface with preadsorbed hydrogen. As shown earlier [Appl. Catal. A: Gen. 245 (2003) 15], low deposited selectively low-Miller-index microfacets, whereas excess use caused statistical deposition Rh. This difference induced also alterations classical pattern: sample randomly located behaved like Parent catalyst dispersion 80%. Each hydrogenolyzed nearly to same extent; product distribution (ROPD) showing thus no variation as function conditions. selective followed, however, pattern sintered sample: 2-methylpentane underwent preferential smaller fragments. Thus, changing position deposits (without modifying particle size) changes prevailing route.