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Surface characterization of different particles arising as a result of coal combustion process in selected power plants from Central Poland using ToF-SIMS

100%
Grams J., Bawolak K.
Polish Journal of Chemical Technology
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2007
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vol. 9
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issue 4
77-80
EN
The aim of this work was the ToF-SIMS investigations of different particles arising as a result of a coal combustion process in selected power plants from Central Poland. The chemical composition and distribution of particular compounds on the studied surfaces were determined. Moreover, the ratio of the quantity of aromatic and aliphatic hydrocarbons adsorbed on the surface of the particles was estimated. A qualitative analysis of the studied samples demonstrated the presence of a big number of various compounds, including heavy metals such as Pb, Cd and As on the investigated surfaces. In the prevailing number sample components were distributed non-homogenously on the surface and the larger areas richer in a certain type of ions were observed.
2
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Surface analysis of the size-fractioned urban aerosols by secondary ion mass spectrometry (ToF-SIMS)

100%
Rogowski J., Bem H.
Open Chemistry
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2007
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vol. 5
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issue 1
132-143
EN
The secondary ion mass spectrometry method (ToF-SIMS) has been applied to the analysis of some mineral and organic species on the surface layers of airborne urban particulates. Particulate matter was collected on aluminum sheets of the 8-stage Anderson type cascade impactor from three different sampling sites in the city of Lodz, Poland, which were different in terms of aerosol source apportionment. The obtained results show that vehicle combustion products occur mainly in fine fraction with aerodynamic diameters below 1µm. The main contribution to the mineral components comes from direct and traffic related soil resuspension. [...]
3
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ToF-SIMS studies of the surface of Pd/ZrO2-TiO2catalyst used in the hydrodechlorination process

75%
Grams J., Góralski J., Kleczewska J., Szczepaniak B., Paryjczak T.
Polish Journal of Chemical Technology
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2007
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vol. 9
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issue 3
81-85
EN
Time-of-flight secondary ion mass spectrometry (ToF-SIMS) was used in order to obtain the information about the surface composition of Pd/ZrO2-TiO2 catalyst and to estimate the changes in the concentration of particular components on its surface during the hydrodechlorination of CCl4. The results demonstrated that the hydrodechlorination process led to the increase in the concentration of chlorine and the drop in the amount of surface accessible palladium, while the quantity of Pd-Cl bounds did not change considerably. It suggested that the presence of ZrO2 protected the surface of the studied catalyst against the formation of PdCl2.
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