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Limestone in flue gas desulphurization in oxygen-enriched atmospheres. Part I. The effect of CO2 on limestone calcination

Kochel A., Cieplińska A., Szymanek A.

Chemical and Process Engineering

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2012

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Vol. 33, nr 2

255-262

EN

The article describes the testing of four selected samples of limestone originating from four commercially exploited deposits. The tests of sorbents included a physicochemical analysis and calcination in different atmospheres. The main aim of the tests was to determine the possibilities for using limestone during combustion in oxygen-enriched atmospheres. Tests in a synthetic flue gas composition make it possible to assess the possibility of CaC03 decomposition in atmospheres with an increased C02 concentration.

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Limestone in flue gas desulphurisation in oxygenenriched atmospheres. Part II. The effect of CO2 on direct limestone sulphation

Kochel A., Cieplińska A., Szymanek A.

Chemical and Process Engineering

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2012

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Vol. 33, nr 3

359-367

EN

The article presents tests carried out on three selected samples of limestone originating from three commercially exploited deposits. The tests of sorbents included desulphurisation in different atmospheres and a physicochemical analysis of desulphurisation products. The aim of the tests was to determine desulphurisation efficiency and conversion degree as dependent on the concentration of O2 and CO2.

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Structural and Spectroscopic Study of trans-Bis(1,3,5-trimethylpyrazole)-bis(O,O'-nitrate) Copper(II) Complex

Wiśniewski Z., Wojciechowska A., Kochel A., Wysokiński R.

Polish Journal of Chemistry

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2007

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Vol. 81, nr 7

1277-1288

EN

Cu II complex with 1,3,5-trimethylpyrazole (1,3,5-TMePz) trans-[Cu(1,3,5-TMePz)2(NO3)2] has been prepared and studied by X-ray diffraction, vibrational and electronic spectroscopy. The complex crystallizes in the orthorhombic crystal system, P212121 space group with lattice parameters:a = 7.6784(8),b = 13.5856(11), c = 16.3372(13) capital A ring, V = 1704.2(3)capital A ring 3 and Z = 4. The hydrogen bond system stabilizes the crystal structure. Two nitrogen atoms of 1,3,5-TMePz and four oxygen atoms of chelating NO-3 groups form a trans-CuIIN2O2O2 ' chromophore.

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Synthesis, structure and magnetic susceptibility of ammonium hexaiodorhenate(IV)

Kochel A.

Materials Science Poland

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2004

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Vol. 22, No. 1

69--75

EN

This work reports on the synthesis, magnetic properties and crystal structure of (NH4)2ReI6. Bright violet (NH4)2ReI6 is tetragonal, P4/mnc (No. 128), a = b = 7.7436(6), c = 11.6403(14) A, Z = 2, Dx = 4.68 g/cm3, T = 100(1) K. The structure was refined to R = 0.074 for 438 reflections observed. The anion [ReI6]2- has an octahedral environment. The temperature dependence of the magnetic susceptibility measured over the range of 4-300 K exhibits the Curie point at 20 K, indicating the presence of antiferromagnetic interaction between the rhenium centres.

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Synthesis, Magnetic and Spectroscopic Study of (PH4As)2[Re(NCS)6].2H2O

Małecka J., Kochel A., Mroziński J.

Polish Journal of Chemistry

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2002

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Vol. 76 / nr 10

1509-1512

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(Ph4P)2[ReCl5(tcm)] - a new precursor of molecular magnets

Małecka J., Kochel A., Mroziński J.

Materials Science

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2002

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Vol. 20, No. 2

91-96

EN

New complex of composition (PPh4)2[ReCl5(tcm)] have been obtained and characterized by IR, UV-Vis spectroscopies and magnetic measurements. The rhenium atom is six coordinate with five chloride atoms and one tcm group. The compound contains tcm- in menodendate function coordinated to metal via the N-atom. The temperature dependence of magnetic susceptibility measured over the range 1.73-300 K showed the presence of a very weak antiferromagnetic interaction ( zJ=-0.78 cm-1) between the rhenium atoms.