Investigation the Effect of Catalytic Cracking Process on Iraqi Bright Stock Oil Conversion

Authors

  • Saleem Mohammed Obyed

Abstract

For economic considerations this work deals with study the effect of catalytic cracking process on bright stock oil conversion (as a feed) at different temperatures. This byproduct mater (bright stock) was produced from the bottom of the vacuum distillation unit for vacuum residue mater in any crude oil refinery plant. It’s a mount about 5 vol. % to 10 vol. % from the crude oil according to classification of crude oil. An experimental laboratory plant scale was constructed, which consist of batch reactor occupied with multi control device such as (temperature, time).                                                                   

The catalytic cracking reaction was carried out at temperatures between 400 - 450 °C, pressure between (46, 50) atm. and residence time 30 minute with Y- zeolite mater as a catalyst and catalyst to oil ratio of 3.5. The maximum conversion of bright stock oil was obtained by this process equal to 92 vol. % of bright stock. The cracking liquid which has production from catalytic cracking unit at different temperatures was distilled by atmospheric distillation device according to ASTM D-86 in order to achieve light fractions, (gasoline, kerosene and gas oil (. The amount of these light fractions it's about (12, 26, 42) vol. % respectively at temperature 400°C and (15, 25, 46) vol. % respectively at temperature 425°C and (18, 20, 54) vol. % respectively at temperature 450°C. The light fractions (gasoline, kerosene and gas oil) were also distilled by atmospheric distillation device in order to obtained distillation curve for these fractions in order to test their properties.

Finally some major physical and chemical properties of bright stock oil and its cracked product with light fractions were laboratory tested to compare it with commercial property for possibilities usage.   

Published

2020-11-01

Issue

Section

Articles