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Argan nut shell biomass is abundant in southern Morocco and represents a promising feedstock for thermochemical energy conversion through gasification. In this study, a throated downdraft gasifier was designed and constructed to produce syngas from ANS. The physicochemical properties of ANS were first characterized. The gasification process was evaluated in terms of gas yield and syngas heating values. The effects of operating conditions, including the ANS feedstock load and the air flow rate, which determine the equivalence ratio, were analyzed. The gasification characteristics were investigated based on temperature measurements within the gasifier, the instantaneous composition of the produced syngas, the lower heating value (LHV), and the gasification efficiency. A portion of the produced syngas was flared to generate a laminar jet diffusion flame in ambient air. Four flames characterized by relatively low H2/CO ratios were studied. Each flame corresponded to different H2/CO and N2/CO2 ratios, as well as varying instantaneous CH4 concentrations and residual O2 levels. This analysis aimed to evaluate the influence of syngas composition on laminar diffusion flame characteristics.
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Sarh et al. (2026) studied this question.
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