Investigation of Hydrogenation of Aromatic Hydrocarbons on Pt/Pd/USY Catalyst

Abstract

In this paper the aromatic reduction of gas oils and the conversion of several hydrocarbon groups in the conditions of hydrodearomatization were investigated on Pt/Pd/USY catalyst. It was concluded that in case of hydrodearomatization of gas oils cycloparaffin hydrocarbons (naphthenes) were key components, i.e. the practical process parameters of hydrodearomatization in case of a defined catalytic system (catalyst, feed, etc.) is that where the concentration of naphthenes have a maximum value. In case of this the deep hydrodearomatization and further deep heteroatom reduction can be carried out with maximum yield of gas oil. It was additionally determined that in the condition of hydrodearomatization mainly isoparaffins are formed via ring opening of naphthenes, the rate of increase of n-paraffin concentration is slower, i.e. the decadence of cold flow properties of reduced aromatic containing products are less beside the high cetane number. Therefore the gas oil products can be applied as winter quality diesel fuel blending components.