| 초록 |
The hydrogenation and selective ring opening (SRO) of tetralin catalyzed by Ir/USY, Pt/USY, Pd/USY and Ni/USY catalysts have been studied, in context of the removal of polynuclear aromatics from diesel fuel. The catalysts were prepared by impregnation method and their surfaces were characterized by H2-TPR, XRD, NH3-TPD, BET and TEM. Tetraline ring opening was carried out in a fixed-bed reactor at 300OC, under 30bar H2 atmosphere, 2.3h-1 of WHSV, H2/feed molar ratio of 40. The resultant products were analyzed by GC and GC-MS analysis. At a given reaction temperature, a Pt/USY catalyst produces more amount of C10 products (and thus less cracking) than that of other catalysts with similar density of strong acid sites. When upgrading low-quality diesel cuts by using, both the lower degree of cracking and higher yields of ring-opening-product (ROP) were obtained for the processes of using Pt based catalysts, which can result in higher cetane barrel values. |
