Table 1: Estimated kinetic parameters of biphasic model at different temperatures and acid concentrations.

   (min−1) (min−1) (min−1)

Temperature (°C)1206.92 × 10−27.20 × 10−31.90 × 10−30.990
1301.89 × 10−11.27 × 10−22.70 × 10−30.998
1402.58 × 10−13.16 × 10−25.70 × 10−30.999

Acid concentration (w/v)1.5% H2SO4 + 0.6% H3PO45.17 × 10−26.70 × 10−32.60 × 10−30.981
2% H2SO4 + 0.8% H3PO41.89 × 10−11.27 × 10−22.70 × 10−30.998
2.5% H2SO4 + 1% H3PO47.56 × 10−13.45 × 10−22.90 × 10−30.995