Pt/ZSM-5催化苯与合成气烷基化反应及工艺条件研究

制备了Pt/ZSM-5催化剂并将其应用于苯与合成气的烷基化反应中。通过研究反应温度、反应压力与进料空速等工艺条件对苯与合成气烷基化反应的工艺条件进行了优化。同时采用XRD、N2吸附-脱附、TEM、NH3-TPD、H2-TPR及XPS等分析手段对Pt/ZSM-5催化剂进行了表征。当反应温度为500 ℃、反应压力为3 MPa、苯质量空速3 h-1、合成气空速12 000 cm3/(g?h)时，将2% Pt/ZSM-5催化剂用于苯与合成气的烷基化反应，苯的转化率达到9.04%，甲苯、二甲苯的总选择性达到82.85%（其中对二甲苯选择性9.18%）。

STUDY OF ALKYLATION OF BENZENE AND SYNGAS OVER Pt/ZSM-5 CATALYST AND PROCESS CONDITIONS

The one-step process to produce toluene and para-xylene through the alkylation reaction of benzene with syngas has been developed for the first time. Using 2wt% Pt/ZSM-5 zeolite as catalyst, the conversion of the benzene has reached 9.04% and the total selectivity of toluene and para-xylene is 82.85%, especially the selectivity of para-xylene is 9.18%. The optimized reaction condition is as follows: 500 ℃, 3.0 MPa, WHSV=3 h-1 and GHSV=12 000 cm3/(g?h). The catalyst catalysts were characterized by XRD,BET,TEM,NH3-TPD,H2-TPR and XPS to indicate the properties of catalyst, which will provide the foundation for the further study of this one-step process.