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日益严峻的环境问题导致清洁柴油的标准越来越高,而柴油中含量较高的十氢萘等饱和双环化合物的十六烷值低,燃烧性能差,可以对其进行选择性加氢开环反应———即将十氢萘转化为单环烷烃或链烷烃的同时尽量减少反应物分子的碳数损失,以提高油品燃烧性质。首先阐述了十氢萘加氢开环反应机理,并提出B酸位对十氢萘加氢开环反应至关重要,进而介绍了十氢萘开环反应的分子筛载体,并提出Y型分子筛是合适载体,接下来,从金属活性位的角度进行评述,并对比了环烷烃在Pt和Ir两种贵金属上典型的吸附模式,最后,对该领域研究前景进行了展望。
Increasingly stringent environmental issues lead to higher and higher standards for clean diesel, while saturated bicyclic compounds such as decahydronaphthalene, which have a high content in diesel, have low cetane number and poor combustion performance, which allows for selective hydrogenation of the ring Reactions - The conversion of decalin to monocycloparaffins or paraffins, while minimizing the carbon loss of the reactant molecules, to enhance the combustion properties of the oil. Firstly, the mechanism of decahydronaphthalene hydrogenation ring-opening reaction is described. It is also pointed out that the B acid sites are crucial to the decahydronaphthalene hydrogenation ring-opening reaction. Then the introduction of decahydronaphthalene ring-opening reaction molecular sieve carrier and Y zeolite In the following, we review the metal active sites and compare the typical adsorption patterns of naphthenic hydrocarbons on Pt and Ir. Finally, the prospect of the research in this area is prospected.