Synthesis and Performance of Sulfated Mesoporous Zorcina Solid Superacid

As the activity of different acids for the condensation between toluene and formaldehyde depended on the proporation of its strong acid site,mesoporous zirconia supported sulfate acid was synthesized via the self-assembly method and characterized via XRD,N2-adsorption and HRTEM.The thermal stability of the prepared mesoporous zirconia supported sulfate acids were checked at different calcination temperature.It was found that the structure of mesoporous zirconia remained under 600℃,but damaged at higher temperature.NH3-TPD found that the catalyst calcined at 500℃ has the highest acid amount and this catalyst showed the highest activity in the condensation between toluene and formaldehyde.The conversion of formaldehyde reached 45.7%.