2009•Acta Petrolei Sinica(Petroleum Processing Section)Requires access
PREPARATION OF ADAMANTANE OVER DUSY CATALYST
Jun Wang
Open publisher page 0 citations
Abstract
The dealuminated USY(DUSY) modified by deep hydrothermal treatment combined with HCl leaching were prepared.The catalysts of 12-tungstophosphoric acid(PW) supported on DUSY were obtained by impregnation at room temperature.The catalytic performances of DUSY and PW/DUSY1 catalysts were investigated in the preparation of adamantine(ADH) by isomerization of endo-tetrahydrodicyclotadiene(endo-TCD) in a 100 ml batch stainless-steel autoclave with stirring.And their physico-chemical properties were characterized by X-ray diffraction(XRD),N2 adsorption isotherm and temperature programmed desorption of ammonia(NH3-TPD).It was found that when over DUSY1 catalyst,the conversion of endo-TCD up to 99.7% and the yield of adamantine up to 30.1% can be obtained under the following optimal conditions: activated temperature of 350℃,reaction temperature of 260℃,initial pressure of 1.1 MPa,the mass ratio of catalysts to endo-TCD of 0.7,the molar ratio of cyclohexane to endo-TCD of 5.0 and reaction time of 4 h.