Kissinger Method

The peak temperatures of the DTG curves for *S. bigelovii* and *P. dactylifera* at heating rates of 5 K/min, 10 K/min and 15 K/min were plotted according to the Kissinger model as shown in Figure 3. From the slope of the linear relationship, the calculated activation energy, *E* (kJ/mol) and the pre-exponential factor, *A* (1/min), were 147.6 kJ/mol and 3.13 × 10<sup>9</sup> (1/min) for *S. bigelovii*, respectively, and 164.7 kJ/mol and 9.55 × 10<sup>10</sup> (1/min) for *P. dactylifera*, respectively. The peak temperature *Tp* (K) for *S. bigelovii* at 5, 10 and 15 K/min was 589, 602 and 609 K, respectively. For *P. dactylifera* it was 592, 603 and 612 K.

**Figure 3.** Kissinger curve for *S. bigelovii*, *P. dactylifera* and co-pyrolysis of them at a mass ratio of 1/1, at different isoconversional points.
