**4. Conclusions**

Activation energy obtained using the Kissinger method for *S. bigelovii* and *P. dactylifera* leaves were 147.6 KJ/mol and 164.7 KJ/mol, respectively, while pre-exponential factors of 3.13 × 109/min and 9.55 × 1010/min for *S. bigelovii* and *P. dactylifera* leaves were obtained from DTG data. Other values at different stages during the pyrolysis process were also obtained using other isoconversional methods like the FWO, KAS and the generalized isoconversional theories. The mass loss data also revealed the peak temperatures at which reaction is fastest during active pyrolysis. Results of DTG also showed the reaction proceeded in similar phases for the two sampled biomass types, and co-pyrolysis of them at different mass ratios.

**Author Contributions:** Conceptualization, J.-R.B.-O. and J.E.S.; Methodology, P.D. and J.-R.B.-O.; Formal Analysis, P.D. and J.-R.B.-O.; Investigation, P.D.; Resources, J.-R.B.-O.; Writing-Original Draft Preparation, P.D.; Writing-Review & Editing, J.-R.B.-O. and J.E.S.; Supervision, J.-R.B.-O. and J.E.S.; Project Administration, J.-R.B.-O. and J.E.S.; Funding Acquisition, J.E.S.

**Funding:** This research was funded by Masdar Institute, Project 2BIONRG (12KAMA4) and BIOREF (13KAMA1), to help fulfil the vision of the late President Sheikh Zayed Bin Sultan Al Nahyan for sustainable development and empowerment of the United Arab Emirates and humankind.

**Acknowledgments:** Special thanks goes to ISEAS for supplying the biomasses needed for the project. **Conflicts of Interest:** The authors declare no conflict of interest.
