中文摘要：

由生物质气化合成液体燃料（甲醇、二甲醚和低碳烃类），是理想的碳中性绿色燃料，将其用作城市交通和民用燃料，已经引起全世界的广泛关注，也是可再生能源中唯一能转化为液体燃料和化学品的碳资源。通过生物质气化得到合成气的缺点主要是H2／CO比低，CO2含量高等。随着气化和重整技术的提高，通过水蒸气气化后得到的合成气，或者经过重整调整H2／CO，最终的合成气H2／CO比组成可以达到2．20以上，已经达到合成气合成液体燃料的最佳比例要求（合成甲醇合成气最佳组成f=（H2-CO2）／（CO＋CO2）=2．05～2．10）。

英文摘要：

Synthesis of liquefied petroleum gas （LPG） from synthesis gas using hybrid catalyst consisting of methanol synthesis catalyst and USY or ZSM-5 was investigated in a fixed bed reactor. The composition of the hybrid catalyst had great effect on the activity and selectivity of the catalyst. The effect of reaction temperature （260 ℃ - 360 ℃ ）, GHSV （ 1 500 h^-1 - 9 000 h^-1 ） were investigated. The results showed that the best reaction temperature of bifunctional catalyst which consisted of MeLi and ZSM-5 zeolite is 325 ℃, and the CO conversion achieved 72.28%. The hybrid catalyst, which consisted of ZSM-5 zeolite and methanol synthesis catalyst, demonstrated a highly activity for the formation of light hydrocarbon and the selectivity for C3 and C4 hydrocarbons was 23.90% and 19.06% respectively.