Modeling and simulation of co-current moving bed gasification reactors — Part II. A detailed gasifier model

Chen, Jin-Shi; Gunkel, W. W.

doi:10.1016/0144-4565(87)90012-6

Cited by 13 publications

(2 citation statements)

References 8 publications

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“…The computer software programme was based on a model specifically designed for downdraft systems to evaluate the influence of operating and design variables on the operation of the gasifier. The software was developed by Chen et al [ 52 ] and modified by Jayah et al [ 53 ]. It consists of two submodels in the form of flaming pyrolysis and gasification zone submodels.…”

Section: Methodsmentioning

confidence: 99%

Influence of Torrefaction on the Conversion Efficiency of the Gasification Process of Sugarcane Bagasse

et al. 2017

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Sugarcane bagasse was torrefied to improve its quality in terms of properties prior to gasification. Torrefaction was undertaken at 300 °C in an inert atmosphere of N2 at 10 °C·min−1 heating rate. A residence time of 5 min allowed for rapid reaction of the material during torrefaction. Torrefied and untorrefied bagasse were characterized to compare their suitability as feedstocks for gasification. The results showed that torrefied bagasse had lower O–C and H–C atomic ratios of about 0.5 and 0.84 as compared to that of untorrefied bagasse with 0.82 and 1.55, respectively. A calorific value of about 20.29 MJ·kg−1 was also measured for torrefied bagasse, which is around 13% higher than that for untorrefied bagasse with a value of ca. 17.9 MJ·kg−1. This confirms the former as a much more suitable feedstock for gasification than the latter since efficiency of gasification is a function of feedstock calorific value. SEM results also revealed a fibrous structure and pith in the micrographs of both torrefied and untorrefied bagasse, indicating the carbonaceous nature of both materials, with torrefied bagasse exhibiting a more permeable structure with larger surface area, which are among the features that favour gasification. The gasification process of torrefied bagasse relied on computer simulation to establish the impact of torrefaction on gasification efficiency. Optimum efficiency was achieved with torrefied bagasse because of its slightly modified properties. Conversion efficiency of the gasification process of torrefied bagasse increased from 50% to approximately 60% after computer simulation, whereas that of untorrefied bagasse remained constant at 50%, even as the gasification time increased.

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Section: Methodsmentioning

confidence: 99%

Influence of Torrefaction on the Conversion Efficiency of the Gasification Process of Sugarcane Bagasse

et al. 2017

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“…Generally speaking, the cocurrent gasifier is used in small scale power generation and the air coming from nozzles set around the reactor zone, as well as from the top (about 60 %) moves downward in the same direction as the produced gas (the poor gas). It is observed that in co-current gasifiers air input rates regulate the fuel consumption rates [19]. On the other hand, the reactor is simple to construct and generates a poor gas with low tar in its composition [20], [21].…”

Section: A) Biomass Gasifier and Gasification Processmentioning

confidence: 99%

Effects of Biomass Properties on the Performance of a Gasifier/Genset System

Jaguaribe¹,

Rumão²,

Silva³

et al. 2020

GJRE

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Biomass can be considered one of the most important sources of energy in the world, because it is: renewable; neutral in terms of green-house gases emissions; capable of replacing conventional fossil fuels, among other factors. On the other hand, gasification is an efficient process of turning available the chemical energy of biomass, with a relatively simple technology. In the present work a co-current open top downdraft gasifier is used, with an 8.5 kW thermal power capacity to fuel an 18 Hp Otto cycle engine coupled to an electric generator. With this apparatus, it was possible to analyze the influence of some properties of the fuel wood particles (size, density, moisture content and so on) on the efficiency of the energy conversion process.

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