Mild ring-opening coupling of liquid-phase cyclohexane to diesel components using sulfated metal oxides.
We have investigated a mild simple synthesis method for ring-opening coupling of liquid-phase cyclohexane to diesel components using various sulfated metal oxides [SO(4)(2-)/Fe(2)O(3) (SF), SO(4)(2-)/TiO(2) (ST) and SO(4)(2-)/ZrO(2) (SZ)] under low temperature (333K) and atmospheric pressure. Neither solvent nor promoters are needed in the reaction system so as to be a clean approach. Operating under these reaction conditions, a maximum activity of 6% was obtained with SF as catalyst, and a significantly high selectivity of 74.5% for nicer diesel components (n-C(14)-C(18)) was obtained simultaneously. Whereas, ST and SZ displayed low activity for cyclohexane reaction. By utilization of the temperature-programmed desorption of ammonia (NH(3)-TPD) measurement and the N(2) adsorption method, the results suggested that a satisfied acid strength distribution and high density of acid sites appeared in SF catalyst in comparison with other catalysts, which may play an important role in the reaction.
Mao
Wei
W
Institute of Energy Chemistry, School of Chemistry and Materials Science, Shaanxi Normal University, Xi'an 710062, People's Republic of China.
Ma
Hongzhu
H
Wang
Bo
B
D000641:Ammonia; D002384:Catalysis; D003510:Cyclohexanes / Q000737:chemistry*; D005742:Gasoline; D009584:Nitrogen; D055601:Organic Chemistry Phenomena; D010087:Oxides / Q000737:chemistry; D013431:Sulfates / Q000737:chemistry
D003510:Cyclohexanes; D005742:Gasoline; D010087:Oxides; D013431:Sulfates; C506365:Cyclohexane; D000641:Ammonia; D009584:Nitrogen