The single-stage steam gasification of magnetite heavy suspension separated coal samples from hungarian brown coal

Currently, gasification of coal is considered the centre of the clean coal technology. In this study, there were two coal samples from the magnetite heavy suspension separated process used in the single stage fixed bed gasification within the non-moving of material. These two types of samples were m...

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Bibliographic Details
Published in:Építöanyag (Online) no. 4; pp. 150 - 155
Main Authors: Mai, Thuan Duc, Sebe, Emese, Kállay, András Arnold
Format: Journal Article
Language:English
Published: Budapest Scientific Society of the Silicate Industry 01.10.2022
Subjects:
Calorific value
Carbon
Coal gasification
Efficiency
Electricity distribution
Experiments
Fixed beds
Flow velocity
Heat
Lignite
Magnetite
Moisture content
Municipal solid waste
Nitrogen
Steam flow
Synthesis gas
Temperature effects
ISSN:2064-4477
Online Access:Get full text
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Summary:Currently, gasification of coal is considered the centre of the clean coal technology. In this study, there were two coal samples from the magnetite heavy suspension separated process used in the single stage fixed bed gasification within the non-moving of material. These two types of samples were marked as A1 and A2 sample, with the specific densities of ≤1.8 g/cm3 and ≤1.6 g/cm3, respectively and diameters 1-20 mm. The gasification experiments were conducted at steam flow rates of 5 and 10 g/min and gasification temperatures of 700, 800, and 900°C. The main purpose of the experiments was to consider the effects of temperature and steam flow rate during the coal gasification from both, the energetic and chemical utilisation point of views. With higher temperature and steam flow rate, the experiments within A1 sample performed a better char yield and higher volume of produced syngas. In the case of A1 sample, the lowest char yield was 23.78 wt% at 900°C gasification temperature and 10 g/min steam flow rate. At 900°C of gasification temperature, the range of low heating value of synthesis gas were from 9.13 to 9.49 MJ/Nm3 within 5 and 10 g/min of steam flow rate, indicating that the produced syngas is sufficient for energetic application. The range of H2/CO ratio were from 1.96 to 2.52 at 900°C of gasification temperature, which has a great potential for a further chemical application process.
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ISSN:2064-4477
DOI:10.14382/epitoanyag-jsbcm.2022.23