Gasification is one of the efficient upcycling technologies to treat the biomasses and convert them from a low-value product to a high-value and hydrogen rich syngas. Gasification performances of the indigenous biomasses of West Azerbaijan province of Iran are comprehensively investigated in this study based on thermodynamic modeling. Wheat straw, chickpea straw, sunflower seed shell, and lentil straw were collected from the farms of West Azerbaijan province. They were finely chopped, and the CHNS test was conducted to identify their chemical formula. The gasification process of these indigenous biomasses of West Azerbaijan province is modeled. Chickpea straw gasification resulted in higher cold gas efficiency (ηc), lower carbon dioxide emission and higher syngas lower heating value (LHVs). As a consequence, multi-criteria decision analysis revealed that chickpea straw biomass ranked the first between the indigenous biomasses of West Azerbaijan province. Parametric study indicated that increasing gasification temperature and reducing steam to biomass ratio improved ηc and LHVs. Also, the carbon dioxide emission was mitigated by increasing gasification temperature and reducing steam to biomass ratio. The multi-objective optimization showed that the optimum ηc of 48.5%, the carbon dioxide emission of 19.3 g/mol and LHVs of 411 kJ/mol were achieved at gasification temperature of 1000 °C and steam to biomass ratio of 1.
