Title

Oxygen-Blown Gasification Of Pine Charcoal In A Top-Lit Downdraft Moving-Hearth Gasifier

Keywords

Charcoal; Downdraft gasifier; Gasification; Syngas

Abstract

The design of an efficient biomass gasifier is essential for the development and practical realization of biomass-to-fuels processes. The study of pine charcoal steam/oxygen gasification in a top-lit downdraft moving-hearth gasifier is presented in this paper. A thermodynamic analysis of the charcoal (C)-H2O-O2 system was conducted and the composition of the product gas, its lower heating value and the gasifier reduction zone temperature were predicted based on a number of assumptions. A series of the gasifier operations where oxygen flow rate and [H2O]/[O2] molar ratio were process variables was conducted. It was found that in the range of O2 flow rates tested (1-5 g/min), higher flow rates of oxygen resulted in higher concentrations of H2 and CO as well as higher charcoal gasification rates. Likewise, increasing the [H2O]/[O 2] ratio resulted in higher H2/CO ratio in the product gas as well as higher charcoal gasification rate. The minimum and maximum values of the gasifier hearth loads were estimated. The experimental results obtained underscored the importance of maintaining efficient heat transfer within the gasifier and reducing heat loses to the surroundings. © 2013 Elsevier Ltd. All rights reserved.

Publication Date

1-1-2014

Publication Title

Fuel

Volume

118

Number of Pages

27-32

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1016/j.fuel.2013.10.039

Socpus ID

84888320933 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84888320933

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