| Physical and Chemical Properties | The appearance of chemical properties is annular, the external dimension is 8mm (outer diameter) × 5mm (inner diameter) × 6mm, the bulk density is about 900kg/m3, the radial compressive strength is> 7kg/particle, and the axial compressive strength is> 20kg/particle. Catalytic activity: the conversion rate of o-xylene is about 100%, the yield of phthalic anhydride is 112.08% ~ 112.70% (mass), the yield of maleic anhydride is 8.2% ~ 9.65% (mass), and the amount fraction of CO CO2 is 13.77% ~ 14.25%. Evaluation conditions: airspeed 3000h-1, o-xylene mass concentration 80g/m3, salt temperature 369~370 ℃, hot spot temperature 450~455 ℃. |