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Experimental evaluation of the dry coal deshaling by pneumatic vibrating FGX separator on the CO 2 gasification process
Author(s) -
Czerski Grzegorz,
Grzywacz Przemysław,
Dziok Tadeusz,
Śpiewak Katarzyna,
Makowska Dorota
Publication year - 2020
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.6166
Subject(s) - coal , chemistry , mercury (programming language) , heat of combustion , separator (oil production) , potassium , gangue , chlorine , sulfur , waste management , pulp and paper industry , mineralogy , environmental chemistry , combustion , organic chemistry , physics , thermodynamics , engineering , computer science , programming language
Summary The dry deshaling process using the FGX method is a modern technique of coal quality enhancing without the use of water. The positive effect of this operation is the increase of calorific value and the removal of contaminants such as sulphur, chlorine, mercury and other heavy metals along with the separated gangue. However, elements such as sodium, potassium or calcium, considered as catalysts in the gasification process, are also partially removed. Consequently, the global effect of the dry deshaling on coal reactivity, being a key parameter determining its suitability for the gasification, is hard to predict. This study aims to determine the impact of dry deshaling of coal by FGX separator on its reactivity. Using TG analysis, 10 samples of coals from Polish mines, before and after the dry deshaling at commercially working FGX separator, were gasified in CO 2 atmosphere under non‐isothermal conditions. The effect of deshaling on the basic properties of coals, ash composition and the content of contaminants such as sulphur and mercury, was also determined. The results showed slightly lower reactivity of clean coals. The values of kinetic parameters of gasification reaction were similar, or an increase in the activation energy value was compensated by the higher value of the pre‐exponential factor. The basic properties of coals and the content of sulphur and mercury have changed after the deshaling process, and the magnitude of these changes differed significantly among the samples analysed. The changes in the ash composition were insignificant. These results suggest that FGX technology may be an attractive way of coal preparing for the gasification, resulting in a reduction of by‐products and contaminants without adverse effect on coals reactivity.