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Energies 2018, 11(4), 1015; https://doi.org/10.3390/en11041015

Advanced One-Dimensional Entrained-Flow Gasifier Model Considering Melting Phenomenon of Ash

1
Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
2
Graduate Institute of Ferrous Technology, Pohang University of Science and Technology (POSTECH), Pohang 37673, Korea
*
Author to whom correspondence should be addressed.
Received: 3 March 2018 / Revised: 17 April 2018 / Accepted: 17 April 2018 / Published: 21 April 2018
(This article belongs to the Special Issue Biomass Chars: Elaboration, Characterization and Applications Ⅱ)
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Abstract

A one-dimensional model is developed to represent the ash-melting phenomenon, which was not considered in the previous one-dimensional (1-D) entrained-flow gasifier model. We include sensible heat of slag and the fusion heat of ash in the heat balance equation. To consider the melting of ash, we propose an algorithm that calculates the energy balance for three scenarios based on temperature. We also use the composition and the thermal properties of anorthite mineral to express ash. gPROMS for differential equations is used to solve this algorithm in a simulation; the results include coal conversion, gas composition, and temperature profile. Based on the Texaco pilot plant gasifier, we validate our model. Our results show good agreement with previous experimental data. We conclude that the sensible heat of slag and the fusion heat of ash must be included in the entrained flow gasifier model. View Full-Text
Keywords: Texaco pilot plant; reactor modelling; ash fusion temperature (AFT); melting phenomenon Texaco pilot plant; reactor modelling; ash fusion temperature (AFT); melting phenomenon
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Kim, J.; Oh, H.; Lee, S.; Yoon, Y.-S. Advanced One-Dimensional Entrained-Flow Gasifier Model Considering Melting Phenomenon of Ash. Energies 2018, 11, 1015.

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