Theoretical and Experimental Study of Potato Shoot Gasification in Fluidized- and Fixed-Bed Gasifier

Abstract

A bench-scale updraft gasifier was used as a fluidized- and fixed-bed gasification unit in three modes (fluidized-bed at equivalence ratios (ER) = 0.2 and 0.25, and a mode in fixed-bed). The experiments were done at five different temperatures (650, 700, 750, 800, and 850 ^oC). To obtain the required data to develop a thermodynamic equilibrium model, the proximate and ultimate analysis were carried out on potato shoots as feedstock. Since the developed model is a temperature-based model, it gives different outcomes at different temperatures. The model gave a completely exact result to predict CH4 in fluidized beds at ER = 0.25. The average error for the difference between each produced gas in experiments and the model showed the best result of the model for CO with the error of just 0.7%. Regarding each experiment data difference with the model data, the model was more accurate to be used in fluidized bed, especially at ER=0.25 than the other two modes. Moreover, the best performance of the model was obtained for CO, N₂, and CO₂, according to the average errors. Since the maximum amount of high heating value (HHV) and carbon conversion efficiency (CCE) was observed at higher temperatures, it can be contended that the model has better performance at higher temperatures.