Effect of KCl Addition Method on the Pt/Kl Catalyst for the Aromatization of Hexane

摘要: Abstract The influence of the method for loading platinum precursor and adding KCl, KCl content, calcination temperature, addition procedure, various additives, water washing on activity selectivity Pt/KL catalysts hexane reforming reaction has been investigated. catalyst preparation methods involve ion exchange (IE), incipient wetness impregnation (IWI), coimpregnation with (IWI-KCl). prepared by [Pt(NH3)4]Cl2 followed (IE-KCl) gave much higher benzene formation than KL zeolite KCl. IE-KCl KCl/Pt molar ratio 4.5 showed 100.0% conversion 89.3% yield at 743 K 0.2 MPa. exhibited lower H/Pt ratios IE catalyst. procedures markedly affected catalyst; to sample prior reduction was necessary exhibit high in formation. It also found that performance is temperature. With catalysts, however, decrease caused high-temperature not as serious In contrast, IWI IWI-KCl production highly sensitive drastically decreasing 823 K. Cl species may have existed state