ISOMERIZATION OF n-PENTANE AND n-HEXANE IN PARTICIPATION OF COMPOSITE SULFATED ZIRCONIUM DIOXIDE CATALYSTS

A catalytic system composed of metal-modified HMOR zeolite and sulfated zirconium dioxide, capable of isomerizing n-pentane and n-hexane to highoctane gasoline components - iso-pentane and iso-hexanes at ordinary atmospheric pressure and low temperature, was synthesized. The role of each component of the catalytic system in the process was clarified, it was shown that the ZrO2 component of the system lowers the temperature of the process, cobalt ensures the stability of the catalytic system, and sulfate anions cause high isomerizability. The role of each component of the catalytic system in the process has been clarified. It has been found that the metallic component cobalt ensures the stability of the catalytic system, zirconium dioxide allows for a lower process temperature, and sulfur anions ensure a higher rate of isomerization. It was found that the components of the catalytic system carry out low-temperature isomerization together. The process was carried out with and without hydrogen, and hydroisomerization was shown to be more efficient than conventional isomerization. The optimal temperature of the process is determined to be 180 degrees C. On the catalytic 0.4%Co/HMOR/10%ZrO2 - SO42- (2%) system at 180 degrees C, WSHV=2 h(-1), H-2:CH=3:1, GHSV(H2) = 350 h(-1), the conversion of n-pentane and n-hexane was 80-86%, and the isoselectivity was 90%. It was found that the thermal processing of the catalytic system in hydrogen flow at a temperature of 380 degrees C provides high activity and stability. It was found that the conversion of both hydrocarbons on the synthesized catalytic system takes place by a bimolecular mechanism