Application Possibilities of Zeolite Catalysts in Oligomerization of Light Olefins

Eszter Kriván,Jenő Hancsók,Szabina Tomasek

doi:10.3311/ppch.7204

Eszter Kriván, Jenő Hancsók + Show 1 more

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https://doi.org/10.3311/ppch.7204

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Abstract

In recent decades, the application of more zeolite-type catalysts has been studied in oligomerization reaction. In the oligomerization process various boiling-range isoolefins can be produced which can be hydrogenated to isoparaffins. The oligomerization of olefins in the light FCC gasoline-matrix in the presence of zeolites has not yet been reported. Therefore, our objective was to select a catalytic system that is suitable for producing isoolefin mixtures from the referred feedstock. The activity of the studied catalytic systems was similar, but with the use of the two layered bed the share of oligomers in middle distillate boiling point range was doubled. In the favourable reaction conditions (two layered bed, T: 270 °C, P: 40 bar, LHSV: 1.0 h-1) such isoolefin mixtures can be produced from which after hydrogenation excellent, environmentally friendly gasoline, JET, and diesel gas oil blending components can be obtained.

Highlights

The motor fuel demand of the world, especially for middle distillates, continues to grow in the European Union
Our objective was to select a catalytic system that is suitable for producing isoolefin mixtures from the referred feedstock
One method of production of isoparaffins is the hydrogenation of isoolefin mixture formed in oligomerization of light olefins (3-6 carbon atoms) (Figure 1)

Summary

Introduction

The motor fuel demand of the world, especially for middle distillates, continues to grow in the European Union. One of the great advantages of the technology is that it can produce more valuable products from less valuable hydrocarbon industrial by-products, which can be formed in different technologies (fluid catalytic cracking of distillates, steam cracking, cracking of waste plastics and other thermal technologies, Fischer-Tropsch synthesis). Another advantage is that the oligomerization is flexible in terms of the average molecular weight of the hydrocarbon product and in terms of the composition (gasoline, JET, and gas oil fractions).

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