The catalytic activities of platinum (Pt) supported on various metal oxides (MOX; Al2O3, SiO2, TiO2, MgO and ZnO) for hydrodesulfurization (HDS) of thiophene were investigated. HDS activities of supported Pt catalysts were examined at 350oC by using conventional fixed bed flow reactor under atmospheric pressure. The order of HDS activities of Pt/MOX was as follows; Pt/Al2O3 > Pt/SiO2 > Pt/TiO2 > Pt/MgO > Pt/ZnO. Catalytic properties of MOX supports and Pt/MOX were evaluated by nitrogen adsorption, decomposition of 2-propanol (2-PA), XRD and hydrogen adsorption. It was revealed that HDS activities of Pt/MOX catalysts were not correlated to BET surface area and acid-base properties of MOX but these were strongly correlated to the dispersion of Pt on MOX.種々の金属酸化物(MOX;Al2O3,SiO2,TiO2,MgO,ZnO)に担持した白金(Pt)触媒のチオフェン水素化脱硫(HDS)反応に対する活性(350oC)について検討した.担持白金触媒のHDS活性は常圧固定床流通式反応装置を用いて検討した.その結果,Pt/MOXのHDS活性の序列はPt/Al2O3 > Pt/SiO2 > Pt/TiO2 > Pt/MgO > Pt/ZnOとなることがわかった.MOX担体の表面積,酸塩基特性およびPtの分散度を窒素吸着法,2-プロパノールの分解反応,XRDおよび水素吸着法で評価したところ,Pt担持MOX触媒のHDS活性はMOXのBET表面積および酸塩基特性には依存しないが,Ptの分散度に強く依存することが明らかとなった.
Hydrodesulfurization of Thiophene over Platinum Supported on Metal Oxide Catalysts
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