Abstract
Synthesis gas conversion at 548 K, 8.3 MPa and a H-2/CO = 1 over a 10 wt% MoP on SiO2 catalyst yielded mostly hydrocarbons with 35% selectivity to methane. K addition to the MoP-SiO2 shifted selectivity to oxygenates. With 5 wt% K-MoP-SiO2 the major products were acetaldehyde (14.3%), acetone (13.5%) and ethanol (17.2%), with <03% methanol. The oxygenated product space-time-yield was 89 g kg cat(-1) h(-1) and the methane selectivity was 9%. The low methanol and methane selectivities reported herein are unique among the Mo-based synthesis gas conversion catalysts. (C) 2008 Elsevier B.V. All rights reserved.