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Uliasz-Bochenczyk A.,Instytut Gospodarki Surowcami Mineralnymi | Gawlicki M.,AGH University of Science and Technology | PomykaLA R.,AGH University of Science and Technology
Gospodarka Surowcami Mineralnymi / Mineral Resources Management | Year: 2012

Power production is the largest source of emissions of anthropogenic carbon dioxide. Themain fuels in Poland are solid fuels- hard coal and lignite. Their combustion produces large quantities of waste, primarily fly ash. The ashes from lignite, due to the chemical and phase composition, and thus their properties, have- so far- limited economic use. Among their possible applications is the use of mineral sequestration of carbon dioxide- this is the result of their relatively high content of active CaO and MgO, which can react with carbon dioxide in aqueous suspensions. The paper presents mximum theoretical capacity of CO2 bonding for examined fly ashes and the results of the research on absorption of CO2 by the ash-water suspensions from fly ash resulting from the combustion of lignite from Pâ tnów and Turów power plants. Calculated for the examined fly ashes maximum theoretical capacity of CO2 bonding amounted to 14% for the ashes fromP1tnów power plant and 14.4% for the fly ashes from Turów power plant. Studies have shown that most CO2- 8.15 g/100 g of ash, was absorbed by suspension with ashes from Turów power plant with a mass ratio of ash to water of at 0.8:1. In the case of ash from Pâtnów power plant absorption was lower and amounted to a maximum- 8.7 g CO2/100 g ash. The largest increase CO2 absorption was observed in the first 30 minutes of carbonation in the suspensions of fly ash from Pâtnów power plant and the first 15 minutes in suspensions of fly ash from Turów power plant After this time, the absorption has increased slowly. An increase in temperature in the chamber system, confirming the occurrence of the process of carbonation and its endothermic character. The highest temperature- 44.8°C recorded in the suspension with ashes fromTurów power plant, which has also the greatest absorption of CO2. The results confirm the usefulness of these ashes to sequester carbon dioxide.

Bujakowski W.,Instytut Gospodarki Surowcami Mineralnymi | Barbacki A.P.,Instytut Gospodarki Surowcami Mineralnymi | Skrzypczak R.,Instytut Gospodarki Surowcami Mineralnymi | Kasztelewicz A.,Instytut Gospodarki Surowcami Mineralnymi
Przeglad Geologiczny | Year: 2012

Looking in Poland for geological structures suitable for hot dry rock technology (HDR - Hot Dry Rock), we propose a new integrated method for selection of geological, petrographic, petrological, geophysical and hydrogeological data in order to descriminate between suitable geological objects. This approach allows identification of the most promising regional geological units in Poland: the Sudetes Mt. and the Fore-Sudetic block. The most prospective local geological units in those areas are granitoid massifs, in particular the Karkonosze granite pluton. The abandoned Michałowice granite quarry, located within the Karkonosze pluton, is proposed as a potential drilling site that best meet the requirements for a thermal modelling study.

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