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Piroliza - alternatywa spalania odpadów komunalnych

100%

Stelmach S. , Sobolewski A.

tom nr 7

17-22

Przedstawiono analizę procesu pirolizy i rozważono możliwość zastosowania jej jako metody utylizacji wybranych rodzajów odpadów. Przedstawiono wyniki eksperymentalnej pirolizy palnej frakcji odpadów komunalnych (RDF). Porównano procesy pirolizy i spalania odpadów.

Analysis of pyrolisis process has been performed and possibilities of its use as a method for solid wastes utilisation have been considered. Results of experimental pyrolysis of refuse derived fuel (RDF) have been presented. Pyrolisis and combustion of wastes has been compared.

Tyre pyrolysis oil fueled dual fuel diesel engine

63%

Hariharan S. , Murugan S. , Nagarajan G.

tom R. 46, nr SC3

31-38

Studies report that Tyre Pyrolysis Oil (TPO) derived from waste automobile tyres through Pyrolysis has similar properties to that of diesel fuel. However the cetane number of Tyre Pyrolysis Oil is lesser than diesel. Early investigations reveal that TPO blended with diesel could be used as an alternate fuel for diesel engines. The maximum TPO diesel blend concentration was 70% and the engine failed to operate satisfactorily beyond this concentration. This may be due to the inferior cetane number of TPO as compared to Diesel. The NOx and smoke were high in diesel engine while running with TPO diesel blends. The main aim of the present work is to assess the effect of using DEE in a diesel engine running on TPO, Small quantities of DEE were inducted along with air in the suction manifold and TPO was injected into the combustion chamber of a single cylinder air cooled diesel engine. The performance and emission characteristics are reported in this paper.

Temperature induced development of porous structure of bituminous coal chars at high pressure

51%

Howaniec N.

tom Vol. 15, iss. 3

120--124

The porous structure of chars affects their reactivity in gasification, having an impact on the course and product distribution of the process. The shape, size and connections between pores determine the mechanical properties of chars, as well as heat and mass transport in thermochemical processing. In the study the combined effects of temperature in the range of 973e1273 _K and elevated pressure of 3 MPa on the development of porous structure of bituminous coal chars were investigated. Relatively low heating rate and long residence time characteristic for the in-situ coal conversion were applied. The increase in the temperature to 1173 _K under pressurized conditions resulted in the enhancement of porous structure development reflected in the values of the specific surface area, total pore volume, micropore area and volume, as well as ratio of the micropore volume to the total pore volume. These effects were attributed to the enhanced vaporization and devolatilization, as well as swelling behavior along the increase of temperature and under high pressure, followed by a collapse of pores over certain temperature value. This proves the strong dependence of the porous structure of chars not only on the pyrolysis process conditions but also on the physical and chemical properties of the parent fuel.