【摘要】 利用XRD、TEM和活性评价等手段,研究了具有不同孔结构和比表面的γ-Al₂O₃表面上Cr₂O₃的集聚状态和晶粒大小,及它们对临氢脱烷基催化活性和选择性的影响。结果表明,具有双孔结构、大比表面γ-Al₂O₃制备的Cr₂O₃/Al₂O₃催化剂,其活性和选择性均呈现最佳值。更多还原

【Abstract】 Techniques of XRD, TEM, and catalytic activity evaluation have been employ- ed to investigate the state of aggregate and crystal size of Cr₂O₃ on the surface of V-Al₂O₃ with different pore structure and specific surface. Their effects on catalytic activity and selectivity of hydrodealkylation reaction are also studied. The results show that Cr₂O₃/Al₂O₃ catalysts made from γ-Al₂O₃ with bimodal pore structure and large specific surface have optimal values of activity and selectivity.更多还原