Rh-Mo-K/Al_2O_3催化剂的CO加氢合成低碳醇性能

ALCOHOLS SYNTHESIS FROM SYNTHESIS GAS OVER Rh-Mo-K/Al 2O 3 CATALYSTS

本文研究了硫化态和还原态ＲｈＭｏＫ／Ａｌ２Ｏ３催化剂上ＣＯ加氢合成低碳醇的反应性能，考察了不同铑负载量、钾助剂、合成气组成和反应条件（温度、压力和空速）对合成醇性能的影响及催化剂的反应稳定性。发现硫化态样品较之还原态样品具有更好的合成醇选择性，催化剂中添加铑后，生成醇（特别是Ｃ２＋醇）活性和选择性大幅度提高。选择合适的反应温度、提高反应压力和空速、适当增加合成气Ｈ２／ＣＯ的比例可以获得较好的合成醇反应性能。

Synthesis of mixed alcohols from synthesis gas over sulfided and reduced RhMoK/Al 2O 3 catalysts was investigated The incorporation of rhodium into the MoK/Al 2O 3 catalysts significantly increased both activity and selectivity for the formation of alcohols and shifted the product distribution of oxygenates towards higher alcohols The selectivities of the reaction to alcohols over the sulfided samples were much higher than those over the reduced samples The investigation on the influence of reaction conditions on the sulfided Rh(0 5W%)MoK/Al 2O 3 catalyst revealed that an optimum temperature for producting alcohols was about 350℃ Moreover, the yield and selectivity towards the formation of alcohols increased with increasing reaction pressure and space velocity The catalyst was very stable for alcohol synthesis, the continuous increase in both activities and selectivities for the formation of alcohols was observed even after a reaction time of more than 100h