HYDROCRACKING OF AROMATIC COMPOUND CATALYZED BY ZEOLITE-CONTAINING NiMo SUPPORTED CATALYSTS

摘要

The supply of heavy oils, which have large molecular weight andnhigher sulfur content, is excess while the demand for them isndecreasing year and year. To obtain white oils such as morenvaluable gasoline, catalytic cracking is usually performed. In thisnprocess, dry gas with lower carbon number and light cycle oil (LCO)nwith higher carbon number than gasoline are obtained besidesngasoline. This LCO fraction includes not only large amount of sulfurnbut also many aromatic compounds such as methylnaphthalene.nTherefore LCO has lower cetane number and is used as a mixture tonless valuable fuel oil for ship. To increase the value of LCO,nhydrocracking is one of promising methods. In recent years,nhydrocracking of LCO, where not only LCO is desulfurized but alsonaromatics such as methylnaphthalenes are hydrocracked to morenvaluable alkylbenzene such as butylbenzene, BTX, that is benzene,ntolune, xylene etc., has been tried to obtain raw materials ofnpetrochemicals. The development of hydrocracking catalysts, whichncan treat both sulfur compounds and larger aromatic hydrocarbons tonsmaller aromatic raw materials for petrochemicals, enables us tonconsider LCO to be a more valuable material, which extends thenutilization of LCO.