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采用高温高压反应釜研究了十氢萘在低硅铝比HY分子筛[n(Si)/n(Al)=3.2]、Beta分子筛n(Si)/n(Al)=9.7]和双功能催化剂Pt-HY、Pt-Beta上的加氢开环反应,考察了分子筛孔道结构及酸性质、贵金属Pt及反应温度等因素对十氢萘转化率和产物选择性的影响。结果表明,十氢萘在Beta分子筛上的转化率较高,且有大量脱氢缩合产物(DHC)生成。Pt引入HY和Beta分子筛后,初始反应速率升高,十氢萘转化率增加,C10产物中开环异构比增大,Beta分子筛上的脱氢缩合反应得到抑制。反应温度升高可以提高十氢萘在HY分子筛上的转化率,使得C10产物选择性下降,而开环异构比(ROP/Iso)增大。
The effect of decalin on the microstructure and mechanical properties of low-silica-alumina HY molecular sieve [n (Si) / n (Al) = 3.2], Beta zeolite n (Si) / n (Al) = 9.7 and bifunctional catalyst Pt -HY and Pt-Beta. The effects of pore structure, acidity, Pt and reaction temperature on the conversion and product selectivity of decalin were investigated. The results showed that the conversion of decalin on Beta zeolite was high, and a large amount of dehydrogenated condensation product (DHC) was formed. The introduction of Pt into HY and Beta zeolite increased the initial reaction rate and the decahydronaphthalene conversion rate increased. The ring opening isomerization ratio of C10 increased, and the dehydrogenation condensation reaction on Beta zeolite was inhibited. The increase of reaction temperature can increase the conversion of decalin over HY molecular sieve, which leads to the decrease of C10 product and the increase of ROP / Iso ratio.