Hydrogen production by steam gasification of Hungarian brown coal char

Presently, the hydrogen is mainly generated from fossil fuels (natural gas and coal). The thermochemical conversion processes of carbon-based materials to hydrogen-rich gas has been widely described in the literatures. In which, the steam gasification is highly recommended for this purpose. The expe...

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Veröffentlicht in:Multidiszciplinaris Tudomanyok Jg. 12; H. 3; S. 79 - 88
Hauptverfasser: Mai, Thuan Duc, Kállay, András Arnold
Format: Journal Article
Sprache:Englisch
Veröffentlicht: Miskolc University of Miskolc 2022
Schlagworte:
Biomass
Carbon dioxide
Coal
Fossil fuels
Heat
Hydrocarbons
Hydrogen
Natural gas
Synthesis gas
Trends
ISSN:2062-9737
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Zusammenfassung:Presently, the hydrogen is mainly generated from fossil fuels (natural gas and coal). The thermochemical conversion processes of carbon-based materials to hydrogen-rich gas has been widely described in the literatures. In which, the steam gasification is highly recommended for this purpose. The experimental steam gasification of Hungarian brown coal char was conducted in a single stage fixed-bed reactor with 80 mm of inner diameter and 1,200 mm of effective length. The experiments were carried out at 700, 800 and 900 °C of gasification temperature within 5 g/min of steam flow rate and 5, 7.5 and 10 g/min of steam flow rate within 900 °C of gasification temperature. The aim of this study is to determine the performance of Hungarian brown coal char during the gasification with the variation of gasification temperature and steam flow rate, as well as the hydrogen production during the gasification process. The gasification temperature plays an important role in the conversion process in the gasifier, as well as the change in the synthesis gas composition. The introduction of higher steam flow rate can also improve the reduction process. The highest total hydrogen yield of 1.8 Nm3 was gained at 900 °C of gasification temperature and 10 g/min of steam flow rate for 3 kg of initial coal.
Bibliographie:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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ISSN:2062-9737
DOI:10.35925/j.multi.2022.3.8