TY - GEN
T1 - Ultra clean coal from polish coal deposits
AU - Slaczka, Andrzej
AU - Wasilczyk, Adam
AU - Nowak, Jacek
N1 - Publisher Copyright:
© SGEM2017. All Rights Reserved.
PY - 2017
Y1 - 2017
N2 - Ultra clean coal (UCC) contains less than one per cent by weight ash. It is created via chemical leaching, because conventional, physical separating techniques cannot achieve this extremely low mineral content. Potential uses for ultra clean coal, apart from power generation, include for example directly fired into gas turbines – increasing the efficiency of power generation and eliminating the need for ash dams, production of graphite and carbon fibres, wood charcoal alternative for silicon smelting and others. In the paper is presented preparation of UCC from three kinds of Polish coals differing in degree of carbonification. In the study coals ranks of 35.1 (sample A), 33 (sample B) and 31 (sample C), according to the Polish Standards were used. The degree of carbonification was determined on the basis of vitrinite reflectance. Petrographic characteristics was done by investigation of macerals, microlithotypes, carbominerites and minerites distribution. Coal samples were first physically enriched by density separation. Then the enriched portion was chemically demineralized by using the proper leachant. The X-ray investigation of mineral matter before and after leaching were performed too. As leaching agents hydrochloric acid (HCl), hydrofluoric acid (HF) and nitric acid (HNO3), were used. On the base of the results obtained it was stated that it is possible to get coal of the ash content below 1%.
AB - Ultra clean coal (UCC) contains less than one per cent by weight ash. It is created via chemical leaching, because conventional, physical separating techniques cannot achieve this extremely low mineral content. Potential uses for ultra clean coal, apart from power generation, include for example directly fired into gas turbines – increasing the efficiency of power generation and eliminating the need for ash dams, production of graphite and carbon fibres, wood charcoal alternative for silicon smelting and others. In the paper is presented preparation of UCC from three kinds of Polish coals differing in degree of carbonification. In the study coals ranks of 35.1 (sample A), 33 (sample B) and 31 (sample C), according to the Polish Standards were used. The degree of carbonification was determined on the basis of vitrinite reflectance. Petrographic characteristics was done by investigation of macerals, microlithotypes, carbominerites and minerites distribution. Coal samples were first physically enriched by density separation. Then the enriched portion was chemically demineralized by using the proper leachant. The X-ray investigation of mineral matter before and after leaching were performed too. As leaching agents hydrochloric acid (HCl), hydrofluoric acid (HF) and nitric acid (HNO3), were used. On the base of the results obtained it was stated that it is possible to get coal of the ash content below 1%.
KW - Ash-free coal
KW - Demineralization
KW - Ultra clean coal (UCC)
KW - X-ray investigation
UR - https://www.scopus.com/pages/publications/85032452934
U2 - 10.5593/sgem2017/42/S17.082
DO - 10.5593/sgem2017/42/S17.082
M3 - Conference contribution
AN - SCOPUS:85032452934
SN - 9786197408263
T3 - International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management, SGEM
SP - 659
EP - 666
BT - Education and Accreditation in Geosciences; Environmental Legislation, Multilateral Relations And Funding Opportunities
PB - International Multidisciplinary Scientific Geoconference
T2 - 17th International Multidisciplinary Scientific Geoconference, SGEM 2017
Y2 - 29 June 2017 through 5 July 2017
ER -