A series of WO_3-ZrO_2 solid acids were synthesized by calcining the equilibrium adsorbed peroxotungstic acid/hydrated zirconia precursors. The influences of peroxotungstic acid concentration and calcination temperature on the composition,structure and acidity of the obtained solid acids were evaluated by using XRD, UV-vis and NH_3-TPD. Pt/WO_3-ZrO_2 catalysts were prepared by impregnation method and characterized by BET,H_2-TPR and H_2-TPD. The catalytic performance in the hydroisomerization of n-pentane w...