It is critical to study the bioenergy potential of De-oiled coconut pulp (a new biomass material) in comparison with Coconut shell which are two major wastes from Coconut fruit often disposed of by Coconut oil processing mills, in tropical countries especially Nigeria. Their comparative potential as a bioenergy source was assessed via physicochemical and thermo-chemical characteristics. Both biomass wastes were heated from ambient temperature to 1123.15 K at 5, 10, 15, 20, and 30 K∙min−1. A global dynamic mechanism from the Coats-Redfern model–fitting method was applied to non-isothermal data, using isoconversional methods, to obtain the non-isothermal kinetic and thermodynamic parameters. The physicochemical analysis of the biomass wastes revealed that De-oiled coconut pulp has the potential to produce lighter volatile products but the Coconut shell will produce relatively heavier but cleaner products from a less problematic pyrolysis process. The average apparent activation energies (Ea) from Friedman, FWO, and KAS methods for De-oiled coconut pulp were 333.1 kJ∙mol−1, 316.08 kJ∙mol−1, and 342.01 kJ∙mol−1 while for Coconut shell were 185.29 kJ∙mol−1, 178.75 kJ∙mol−1, and 176.98 kJ∙mol−1 respectively. The dynamic mechanism function, f(α), for reaction order from the Coats-Redfern model–fitting method, were (1 - α)4.2 and (1 - α)6.35 for De-oiled coconut pulp and Coconut shell respectively. Experimental values of differential change in weight with respect to temperature were in good agreement with Friedman model predictions for the pyrolysis of De-oiled coconut pulp at 5 K∙min−1 and 30 K∙min−1 (R2 = 0.7025 and 0.7495, RMSE = 0.087 and 0.1313 respectively) and for the pyrolysis of Coconut shell at 10 K∙min−1 (R2 = 0.8743, RMSE = 0.0663). F-test confirmed the fitness of the model predictions with experimental data. KAS and FWO established ΔG as a thermodynamic property of a great potential utility. The thermodynamic properties revealed that the pyrolysis of both biomass wastes was endothermic. The physicochemical properties established that both biomass wastes are potential bioenergy sources. The level of mass conversion was dependent on the apparent activation energy Ea which confirms proof of multi-step decomposition kinetics, an assumption made for isoconversional model development. Biomass reactivity in pyrolysis is critical to the application of reaction order from Coats-Redfern isothermal kinetics to non-isothermal kinetics.