关键词: 铂锡催化剂, 甲基环戊烷, 高温转化, 碱金属, 稀土金属

Abstract: Using methylcyclopentane thatis most difficult to convert in five membered ring hydrocarbonas a model compound, the conversion situation of methylcyclopentane was investigated over the addition of alkali metal potassium and rare earth metal and reaction temperature. The results Indicated that under the Pt-Sn reforming catalysthigh temperature (≥510 ℃) benefit the conversion improvement of methylcyclopentane, while the selectivity of Heterogeneous dehydrogenation products—benzene was little affectedwithin the experimental temperature range and the process conditions of high temperature and lower liquid hourly space velocity can improve pyrolysis product’s selectivity; The addition of alkali metal K in moderation resulted that the acidity of catalysts reduced, cracking reaction weakened, liquid yield increased, methylcyclopentane’s conversion dropped, and the selectivity of benzene was not affected; The addition of bi-Rare earth metal made that cracking reaction weakened, liquid yield increased, benzene selectivity was slightly increased (510 ℃) in lower LHSV, conversion of methylcyclopentane and benzene selectivity obviously fell in higher LHSV.

Key words: Pt-Sn catalyst, methylcyclopentane, high temperature conversion, alkali metal, rare earth metal