Detailed One-Dimensional Model for Steam-Biomass Gasification in a Bubbling Fluidized Bed

Abstract

A one-dimensional unsteady state model is developed for simulation of biomass gasification in a bubbling fluidized bed. The proposed model accounts for the effect of hydrodynamic behavior of the fluidized bed by incorporating the momentum equations of fluid and fuel particles. The model results are validated against experimental data in the literature as well as the results from existing models. The proposed model is capable of predicting the total gas yield and composition of the product gas at different operating conditions. The effect of biomass feeding position is investigated, and the performance of a reactor under nonisothermal conditions is compared with its performance under isothermal operation. As the developed model is computationally less demanding, it can be used to improve design and operational control of bubbling fluidized bed gasifiers.

Kinetic Modeling and Optimization of Biomass Gasification in Bubbling Fluidized Bed Gasifier Using Response Surface Method

“…In this study, a kinetic lumped model demonstrated in Fig. 1 (Agu et al, 2019) was used to model the pyrolysis of biomass. This model considers the decomposition and conversion of tar to gases as secondary reactions, which gives good predictions for product yield.…”

Steam - oxygen gasification of refuse derived fuel in fluidized beds: Modelling and pilot plant testing

“…Agu et al [32] developed a one-dimensional unsteady state model for steam-biomass gasification in a bubbling fluidized bed (BFB) that includes also momentum balances of particles. The mono-dimensional approach proved to be computationally less demanding without losing accuracy and predictive capability of the effect of feeding position.…”

Empirical Design, Construction, and Experimental Test of a Small-Scale Bubbling Fluidized Bed Reactor

“…According to the process design, to project a gasification plant, simulation models, such as thermodynamic equilibrium, kinetic equilibrium, CFD (Computational fluid dynamics), and ANN (Artificial neuronal network), are used. In this context, several scientific works for designing a gasification plant have been published [5][6][7][8][9][10][11][12][13][14]. Some models give information about one part of the plant, such as reactor, syngas cleaning system, among others (Feeding system, control system, residue removal system, etc.…”