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Flue Gas Desulfurization by Mechanically and Thermally Activated Sodium Bicarbonate

100%
Walawska B., Szymanek A., Pajdak A., Nowak M.
Polish Journal of Chemical Technology
|
2014
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vol. 16
|
issue 3
56-62
EN
This paper presents the results of study on structural parameters (particle size, surface area, pore volume) and the sorption ability of mechanically and thermally activated sodium bicarbonate. The sorption ability of the modified sorbent was evaluated by: partial and overall SO2 removal efficiency, conversion rate, normalized stoichiometric ratio (NSR). Sodium bicarbonate was mechanically activated by various grinding techniques, using three types of mills: fluid bed opposed jet mill, fine impact mill and electromagnetic mill, differing in grinding technology. Grounded sorbent was thermally activated, what caused a significant development of surface area. During the studies of SO2 sorption, a model gas with a temperature of 300°C, of composition: sulfur dioxide at a concentration of 6292 mg/mn3, oxygen, carbon dioxide and nitrogen as a carrier gas, was used. The best development of surface area and the highest SO2 removal efficiency was obtained for the sorbent treated by electromagnetic grinding, with simultaneous high conversion rate.
2
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Properties of active carbon with various particle shapes obtained in char-steam reaction Properties of active carbon with various particle shapes obtained in char-steam reaction

88%
Buczek B.
Chemical and Process Engineering
|
2012
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vol. 33
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issue 3
335-344
EN
The porous structure of cylindrical and ring-shaped char material was developed by partial steam gasification. Micropore and mesopore structures of active carbons with various forms of burn-off were evaluated by nitrogen adsorption/desorption isotherms. Parameters of the Dubinin- Radushkevich equation were calculated as well as the micropore size distribution by the Horvath- Kawazoe method. The results of textural investigations showed that more uniform micropore structure and better mechanical properties were found for ring-shaped active carbons.
3
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Structural and textural characterisation of NiMo catalysts supported on various zeolites

88%
Sarbak Z., Fabiś G., Binkowski S.
Polish Journal of Chemical Technology
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2007
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vol. 9
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issue 1
27-32
EN
Structural and textural properties of nickel-molybdenum catalysts supported on four various type of zeolites of different chemical composition and porous structure have been studied by the methods of IR, XRD and the low-temperature sorption of nitrogen. The catalysts have been obtained by the two-stage impregnation of the supports with the solutions of nickel and molybdenum salts by the method of incipient wetness. The catalysts have been shown to preserve the structure characteristic of the appropriate zeolite supports.
4
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Properties of active carbon with various particle shapes obtained in char-steam reaction Properties of active carbon with various particle shapes obtained in char-steam reaction

75%
Buczek B.
Chemical and Process Engineering
|
2012
|
issue 3
5
Content available remote

Synthesis of inorganic oxide composites with the use of postgalvanic waste solutions of copper(II) sulfate

75%
Modrzejewska-Sikorska A., Ciesielczyk F., Jesionowski T.
Polish Journal of Chemical Technology
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2010
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vol. 12
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issue 2
46-51
EN
The study was undertaken to obtain an oxide composite (inorganic colourful pigment) in the method based on the use of postgalvanic waste solution of copper(II) sulfate. The conditions of the process of precipitation of synthetic CuOSiO2 were optimised by checking the effect of the concentration and the volume ratio of the reagents and the temperature on the physico-chemical parameters of the final product. The oxide composite obtained in the optimum conditions was characterised by high refinement of particles and large specific surface area BET of 326 m2/g.
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