## 3 Results
### Air Gasification Analysis of CPHs
The increase in hydrogen (H\({}_{2}\)) content from 0.23% \(\pm\) 0.02 at 500 \({}^{\circ}\)C to 9.98% \(\pm\) 0.11 at 700 \({}^{\circ}\)C is statistically significant (\(p\) < 0.05), as confirmed by ANOVA and post hoc Tukey tests. These results align with [PERSON] et al. (2022) [58], who conducted a techno-economic assessment of hydrogen production from biomass gasification and found that higher temperatures promote the dominance of endothermic reactions, such as water-gas shift and steam reforming, leading to increased H\({}_{2}\) concentrations. Their study indicated that hydrogen yield could reach 40-60% at temperatures above 800 \({}^{\circ}\)C, depending on the gasification agent used, further supporting our findings. The standard deviation values in our study remain below 0.15% for gas fractions, demonstrating high reproducibility and accuracy in syngas composition measurements. The higher gas production in pyrolysis compared to gasification is due to differences in reaction conditions between the two processes. In pyrolysis, biomass undergoes thermal decomposition in an inert atmosphere (N\({}_{2}\)), which promotes the release of volatile compounds without oxidation reactions occurring. In contrast, gasification uses a gasifying agent (air), introducing partial oxidation reactions that reduce the amount of volatile hydrocarbons and favor the formation of syngas components such as CO and H\({}_{2}\). Additionally, in gasification, hydrocarbons generated in the initial phase can undergo secondary reactions, such as steam reforming (CH\({}_{4}\) + H\({}_{2}\)O \(\rightarrow\) CO + 3H\({}_{2}\)) and the Boudouard reaction (C + CO\({}_{2}\)\(\rightarrow\) 2 CO), explaining the lower presence of hydrocarbons compared to pyrolysis. Therefore, pyrolysis tends to produce a higher proportion of light and volatile gases, whereas gasification enhances carbon conversion into combustible gases through secondary reactions with the gasifying agent. The thermochemical vaporization of CCN51 cocoa shells was assessed through combustion, pyrolysis, and gasification, each presenting distinct advantages and limitations. **Combustion** is the most straightforward process, providing direct energy generation but also leading to significant CO\({}_{2}\) emissions and potential ash-related issues due to the high potassium content (72.02% K\({}_{2}\)O). In contrast, pyrolysis enables the production of biochar (35.89-41.27%), bio-oil (31.13-34.73%), and syngas (24.92-32.92%), with higher energy recovery in the solid fraction. The biochar produced at 700 \({}^{\circ}\)C showed an HHV of 24.97 MJ/kg, making it a promising solid fuel. However, liquid yields decreased at higher temperatures due to thermal cracking. Gasification, on the other hand, provided a syngas with an HHV ranging from 0.89 to 3.36 MJ/m\({}^{3}\), with H\({}_{2}\) and CO contents reaching 9.98% and 11.77% at 700 \({}^{\circ}\)C, respectively. This process is advantageous for clean fuel generation but requires controlled air inputs to optimize syngas composition. Overall, pyrolysis offers a more versatile product distribution, whereas gasification is more suited for high-efficiency syngas production, and combustion remains the simplest but least sustainable alternative.