Analytical model for estimating the production and composition of gas resulted through gasification

Lucian Mihăescu,Iulia Simion,Gabriel Paul Negreanu,Ionel Pîșă,G.P Negreanu,C Ertekin,N.V Vlăduţ,M Tazerout

doi:10.1051/e3sconf/202128601011

Lucian Mihăescu, Iulia Simion + Show 6 more

Open Access

https://doi.org/10.1051/e3sconf/202128601011

Copy DOI

Abstract

For the modelling of gasification processes, several models have been developed over the years. It is remarked that gasification calculation models of very high complexity entail some complications. Therefore, simpler mathematical representations of gasification characteristics and process behavior are required as a first step in addressing such systems. The preliminary calculation simplicity is needed form two perspectives: First – the pre-sizing of gasification installations, and second – the estimation of experimental or functional results. For this kind of topics, an adequate simplified model should be defined. Further, to validate the results it will be necessary to use complex calculation models. The model proposed in this paper addresses gasification with distributive air in the air distribution current, considering general concurrent flow of air fuel. Previous successful investigations, conducted by the present research team, are taken into account within model definition stages. Thus, the work presented here provides useful advances in the field of mathematical modeling of gasification processes. The originality of the model consists in its easy computational accessibility, which allows the approach of technological optimizations, such as the variation of excess air and fuel composition.

Highlights

For the modelling of gasification processes, several models have been developed over the years
Performing or testing the functionalities of a gas generator depends on input obtained from the application of calculation models
In many studies the predicted equilibrium compares reasonably well with the results observed in experiments and in other cases the deviation is small enough

Summary

Introduction

Performing or testing the functionalities of a gas generator depends on input obtained from the application of calculation models. During gasification the mixture of biomass and gasifying agents (air, steam, carbon dioxide or oxygen) are bring to high temperatures, in order to obtain a fuel gas known as synthesis gas or syngas. [4] The synthesis gas is composed of a set of gases and each of them is very important depending on the specific application of the synthesis gas For this reason, there is a lot of research on modeling the composition of syngas obtained from both fixed bed gasifiers and fluidized bed gasifiers [5]. In a recent comprehensive review was reported that approximately 60% of all published gasification studies with models used only equilibrium models and just 40% used, or included, non-equilibrium deviations. [6] The model developed in this research is for the gasification of biomass with air inlet only in the combustion zone

Biomass gasification model

Findings

Thermal field estimation