Direct synthesis of liquefied petroleumgas (LPG) from a low-cost syngas derived from partial oxidation of methane with air (air-POM) was investigated over a hybrid catalyst consisting of methanol synthesis catalyst and Pd-modified Y-zeolite. The hybrid catalyst demonstrated a high activity and more than 73% selectivity for LPG fraction. BET, NH(3)-TPD and TPO-MS were carried out to study the properties of Pd-Y before and after reaction. The results indicated that coke deposition on Pd-Y was the main contribution to the slow deactivation of hybrid catalyst. (c) 2011 Elsevier Ltd. All rights reserved.