Browsing by Author "Świądrowski, Jerzy"

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Access status: Open Access ,
Ekonomiczne i ekologiczne aspekty przetwórstwa węgla na paliwa płynne
(Wydawnictwa AGH, 2009) Rejman-Burzyńska, Alina; Jędrysik, Eugeniusz; Świądrowski, Jerzy
The main objective of coal conversion into liquid is to increase hydrogen to carbon atoms ratio from the level of 0.8 in the coal matter of feed to the level about 2.0 in the product. There are four different theoretical reactions of the additions or the distribution of hydrogen in the coal matrix which give the base for different processes constituting the technology of the coal liquefaction. Generally those processes can be classified in three main categories: the direct hydrogenation, the indirect hydrogenation and the carbonization. The choice of technologies and processes forming particular conversion pathway depends on economic and ecological factors. Currently apart from economic factors such as price of fuels and raw materials, the main constrain of application of processes for production of liquid fuels from coal is the need of limitation of the emission of greenhouse gases (the carbon dioxide). The paper describes the idea of modeling system of coal liquefaction plants allowing to optimise the coal liquids production schema with the respect to economic and environmental constrains
Access status: Open Access ,
Węgiel brunatny jako surowiec do produkcji paliw płynnych
(2007) Świądrowski, Jerzy; Rejman-Burzyńska, Alina; Jędrysik, Eugeniusz
The present-day methods of lignite utilization consist mainly in its combustion in power industry. Nevertheless, in lignite resource-abundant countries research works on more sustainable, less environmentally harmful and more efficient way of lignite utilization have been carried out for a number of years. The incentive lies in generally low lignite production cost when compared with hard coal. One of the possible trends in lignite processing is generation of liquid products - substitute for crude oil, applying the direct hydrogenation method. Lignite suitability for this kind of processing has been already proved in lab-scale, PDU-scale and pilot plant scale. In the paper the present-day research works on lignite (among the others Australian ones) direct hydrogenation are presented as well as the advantages and drawbacks of lignite as a raw material for liquid fuels production. It is concluded that in the national circumstances lignite should be considered a potential raw material for hydrogenation process.