Selective hydrotreating of cat-cracked gasoline over a K–CoMoS/Al2O3 catalyst

Selective hydrotreating of cat-cracked gasoline over a K–CoMoS/Al2O3 catalyst

Type	Journal Article
Author	D. I. Ishutenko
Author	P. A. Nikul’shin
URL	http://link.springer.com/article/10.1134/S0023158415060038
Volume	56
Issue	6
Pages	747-757
Publication	Kinetics and Catalysis
Date	2015/11/24
Abstract	Researchers examined the catalytic properties of CoMoS/Al2O3 and K–CoMoS/Al2O3 laboratory catalysts versus those of the commercial catalyst NK-100 (CoMo/Al2O3) in the hydrotreating of the heavy fraction of cat-cracked gasoline (CCG). They determined the basic kinetic parameters of the hydrodesulfurization and olefin hydrogenation processes. The addition of 7.5 wt % potassium to the CoMoS/Al2O3 catalyst decreases both the apparent activation energy and preexponential factor of both processes and increases the selectivity coefficient by a factor of over 3. Selective hydrotreating of the heavy fraction of CCG was conducted over a K–CoMoS/Al2O3 sample at a temperature of 280°C, a pressure of 1.5MPa, a feed hourly space velocity of 7.5 h–1, and H2: feed = 100 NL/L. As a result, the sulfur content of gasoline was reduced from 92 to 13 mg/kg without affecting the octane number. When the proportion of CCG in commercial gasoline obtained by compounding CCG with other components is 20–35%, the sulfur content of the product will meet the environmental requirements imposed on Class 5 fuels according to regulations.