Process simulation and optimization of groundnut shell biomass air gasification for hydrogen-enriched syngas production

Abstract

In this study, a detailed steady-state equilibrium simulation model was designed using ASPEN Plus software to analyze and assess the efficiency of the groundnut shell biomass air gasification process. The developed model includes three general stages: biomass drying, pyrolysis, and gasification. The predicted results are quite similar to those found in the literature, which is consistent with simulation results being validated against experimental data. The effect of different operating parameters, like the gasification temperature, gasification pressure, and the equivalence ratio (ER), on the syngas composition and H 2 /CO ratio is investigated using sensitivity analysis. The findings of the sensitivity analysis revealed that raising the temperature preferred H 2 and CO production, whereas increasing the pressure has favored CO 2 and CH 4 production. Increasing the ER value also boosted CO and CO 2 yield. Moreover, in an effort to optimize the amount of H 2 generated within the process, the sensitivity analysis was used to evaluate the simultaneous effect of operational parameters on the molar fraction of H 2 . To maximize H 2 as a desired product, the following operating parameters were achieved: gasification temperature of 894 °C, gasification pressure of 1 bar, and ER of 0.05, resulting in an H 2 molar fraction of 0.64. • A new approach of pyrolysis/gasification process is developed for H 2 production. • Groundnut shell biomass gasification process is studied under relevant condition. • Gasification model is developed using Aspen Plus software. • Sensitivity analysis of operating condition on the process performance is studied. • Optimum operating condition to maximize syngas production have been determined.