from first principles PP-I-1

PP-III-8New Silica-Alumina Supports for Pt Ring Opening CatalystsBączkowska K., Grzechowiak J.R., Poźniak R.Wrocław University of Technology, Faculty of Chemistry, Wrocław, PolandKarolina.Baczkowska@pwr.wroc.plMorphology and texture of silica materials depends on the ratio of reactants, the type ofsurfactant used, the pH [1], time and temperature of hydrothermal treatment [2] and thechemical nature of the additional compounds entering the stage of the synthesis of materialsreceived. In well ordered mesoporous silica, templating effect is based on electrostaticinteractions (cationic, anionic surfactants) or hydrogen bonding (neutral surfactants) [3].The aim of this study was to synthesized new silica and silica-alumina materials duringhydrothermal synthesis. Templates (Table 1) were selected from the point of theirbiodegradability, economic aspects and availability. Platinum was supported on the obtainedsilica alumina materials and resulting Pt catalysts (1.5 wt.%) were tested in the transformationof tetralin and decalin (T=300-380 o C, p=5 MPa, H 2 :CH=500 Nm 3 /m 3 ; WHSV=2 h −1 ) toanalyze its performance in the hydrogenation (HYD), ring contraction (RC) and ring opening(RO) reactions. The activity of the catalysts obtained was compared with the activity of thePt/AlSBA-15 catalyst. The content of RC and RO products at 380 o C over Pt/AlSBA-15catalyst were 5.1 and 5.4 wt.% respectively (decalin conversion – 32 %).Table 1. Surfactant used in support hydrothermal synthesis.Template Labeled Used inH 3CN + CH 2CH 2CHOCOC 11HHC23Br3CH 3DMPM-11Laboratory scaleBrC 2H 4OH OHCH N +3 CH 2CH CH 2OC 10H 21C 2H 4OH2OHNC-10Laboratory scaleEthoxylated alkylamines ROCKAMIN SRK8 Industry scaleDi-(Nortallow Carboxyethyl) Hydroxyethyl REWOQUAT WE18 Industry scaleMethylammonium MethosulfateReferences:[1] Zhao W., Hao Z., Hu C., Materials Research Bulletin 40 (2005) 1775.[2] Wang L., Qi T., Zhang T., Chu J., Micropor. Mesopor. Mater. 91 (2006) 156.[3] Gao C., Qiu H., Zeng W. et al, Chem. Mater. 18 (2006) 3904159