The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This work comprises results of the laboratory tests on formation and potential release of contaminants from underground gasification of lignites. Four large scale and multi-day trials were carried out using ex-situ gasification facilities. Two different kinds of lignite were tested, i.e. Velenje lignite (Slovenia) and Oltenia lignite (Romania). Gasification tests were conducted in the artificial coal...
This paper presents the results of six tar sample analyses obtained during 60days of an underground coal gasification (UCG) trial in the “Wieczorek” mine in Poland. The tars were sampled periodically during coal gasification by four different reagents: oxygen enriched air, air, a mixture of air and carbon dioxide, and air with nitrogen. The tar samples were analysed over a wide range of physico-chemical...
The experiment of ex-situ hard coal gasification under the 0.5MPa pressure was carried out by using oxygen, air and oxygen enriched air as gasification reagents. The main process objectives were to investigate the influence of increased gasification pressure and type of gasification reagents on the gasification efficiency. The results of 168h experiment demonstrated that the most advantageous gasification...
In this article, the results from a pilot-scale, underground coal gasification (UCG) experiment conducted in an operating coal mine “Wieczorek” were presented. The 60-day gasification trial demonstrated that through the appropriate selection of the test site and by applying all safety standards essential for the coal mining industry, UCG in an active mine can be conducted safely and efficiently. The...
An experimental simulation of underground coal gasification (UCG) using large bulk samples of ortho-lignite was conducted in an ex-situ laboratory installation. The main goal of the experiment was to evaluate the suitability of the high-moisture lignite for UCG. The average moisture content of the coal feed was 46.5wt%, and its calorific value was 12.6MJ/kg. Changes in the gas composition, the gas...
A study on the environmental impacts of underground coal gasification (UCG) was conducted during a field-scale, in situ coal gasification experiment at the Experimental Mine “Barbara” in Poland. This two-week experiment was a part of a technological effort aiming to produce hydrogen-rich product gas using the UCG technology. As groundwater pollution is recognised to be the most serious environmental...
The main objective of this study was the assessment of the feasibility of applying the underground hard coal gasification in the production of a hydrogen-rich gas. In the course of the experiment the so-called two-stage gasification process in which oxygen and steam were supplied to the reaction zone separately in alternate stages was investigated. For this purpose a special surface reactor has been...
The main goal of the study presented in the paper was to experimentally demonstrate the feasibility of lignite gasification to hydrogen-rich gas under the underground conditions simulated in the ex situ reactor. The in situ gasification conditions were simulated both in respect to the coal seam and the surrounding stratum. In the 54-h experiment the process of lignite gasification with oxygen and...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.