Efficiency of different catalysts and technologies for isomerization of light gasoline fractions

Abstract

The paper analyzes current experience in industrial operation of chlorinated, zeolite, and sulfated oxide catalysts at isomerization plants in Russia. Implementation of the isomerization process in Russia began in the late 90s. The first plants were put into operation on zeolite catalysts; however, the further development of the isomerization process occurred in two ways: using chlorinated or sulfated oxide catalysts. The advantages and disadvantages of chlorinated catalysts are illustrated in the paper by examples from industrial practice. The latter include high sensitivity to water and sulfur-containing compounds in the feedstock and side reactions that contribute to the formation of low octane products in schemes with a recycle of C6. The use of sulfated oxide systems eliminates these drawbacks, which is confirmed by the experience in industrial operation of a sulfated catalyst SI-2 at domestic and foreign plants.