Wyniki wyszukiwania - BazTech

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Skuteczność kluczowych technologii w określaniu stabilności i kompatybilności ropy naftowej

Aptowicz Dagmara, Małachowska Aleksandra, Kibort Katarzyna, Rogowska Monika, Gębicki Jacek

Przemysł Chemiczny

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2023

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T. 102, nr 10

1042--1051

PL

Przedstawiono porównanie metod pomiarowych dotyczących oznaczania stabilności i kompatybilności rop naftowych celem ułatwienia przerobu ropy naftowej i paliw ciężkich. Przeanalizowano doświadczenia innych naukowców w porównaniu z wynikami własnych badań eksperymentalnych. Zaobserwowano różną skuteczność stosowanych metod w odniesieniu do wybranych gatunków rop naftowych. Wytypowano P-value, S-value, metodę SARA oraz metody mikroskopowe jako najbardziej skuteczne, określając możliwości wykorzystania danego oznaczenia w praktyce, w zależności od celu badań i potrzeb odbiorcy. Ponadto w pracy wskazano istotne zalety i wady wymienionych metod, stanowiących użyteczne narzędzie do wyboru najbardziej właściwej metody oznaczania stabilności i kompatybilności dla danego gatunku ropy naftowej i paliw ciężkich.

EN

A comparison of measurement methods for detg. the stability and compatibility of crude oil used to facilitate its processing was presented. The results of own studies were compared with literature data. Different effectiveness of the methods used was observed for selected crude oil grades. SARA, P-value, S-value and microscopic methods were selected as the most effective in assessing the stability and compatibility of a crude oil and heavy fuels. Significant advantages and disadvantages of the mentioned methods were indicated.

2

Microscopic methods for analysis of mortars from historical masonry structures

Owsiak Zdzisława

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2021

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Vol. 69, nr 1

art. no. e136042

EN

The process of historical building conservation includes the repair of mortars eroded due to material and environmental factors. Identification of old mortar constituents is necessary to enable duplicating the material. Information on the binder and aggregate types and contents can be obtained from microscopic observation used in combination with instrumental methods. This paper presents the results of microstructure and mineral composition tests of mortars collected from the walls of thirteenth century buildings. A combination of techniques was used, which included X-ray diffraction, transmitted light optical microscopy and scanning electron microscopy with micro-area elemental composition analysis. The test results revealed porous lime and sand mortars with a binder-aggregate ratio often beyond the commonly adopted values. The mortars contained sand grains of up to 0.5 mm and larger pieces of limestone, flint, feldspar and brick. Transmitted light optical microscopy and scanning microscopy were found to be essential techniques for mortar characterization in existing buildings and structures.

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Zastosowanie metod instrumentalnych w badaniach meteorytu Morasko

Muszyński Andrzej, Runka Tomasz, Gołębiewska Bożena, Michalska Danuta, Karwowski Łukasz

Przegląd Geologiczny

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2019

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Vol. 67, nr 3

156--158

EN

Since its discovery, the Morasko meteorite has been the subject of many studies. Among the publications summarising the mineralogical and geochemical characteristics of the Morasko meteorite, two monographs are worth mentioning by: Dominik (1976) and Muszyński et al. (2012), in which the essentialfeatures of the Morasko meteorite were presented. Since the first piece of the Morasko meteorite was to be explored, the analysis of mineral composition has been conducted with more and more specialised and sophisticated instrumental methods. As it is well known, the Morasko meteorite is classified into the group of iron meteorites IAB MG, and consists mainly of the crystalline Fe-Ni alloy in the form of two minerals: kamacite and taenite, accompanied by tetrataenite. A commonly found structure of the mineral composition of the Morasko meteorite, as regards other iron meteorites, are graphite-troilite nodules, which contain silicate and phosphate minerals. This paper presents a review ofresearch on the mineralogy and geochemistry of the Morasko meteorite, where a number of instrumental tests have been used, from microscopic observations to microchemical semiquantitative analyses using scanning electron microscopy (SEM-EDS), microchemical quantitative analyses using an electron microprobe (WDS), to the structural methods applying Raman spectroscopy. The results of microscopic, microchemical and microstructural investigations, which have included the outer layer of the meteorite known as a fusion crust, have been presented against the petrographic composition of the meteorite. Besides, the type of sediment attached to the outer meteorite layer was examined. The research, conducted on two dozen meteorite fragments, allowed distinguishing two different zones concerning mineralogy and geochemistry, and to determine microstructural changes within them, most probably created in the processes related to the moment of the meteorite impact.

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Stereometryczna charakterystyka stanu czynnej powierzchni tarcz ściernych z ziarnami Trizact™ po procesie szlifowania stali NC6 z wykorzystaniem mikroskopii różnicowania ogniskowego

Kapłonek W., Nadolny K., Baran J., Królczyk G. M.

Mechanik

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2016

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R. 89, nr 8-9

1102--1103

PL

Przedstawiono wybrane rezultaty dotyczące stereometrycznej charakterystyki stanu czynnych powierzchni elastycznych tarcz ściernych z ziarnami typu Trizact™ po procesie szlifowania stali NC6. Pomiary realizowano z wykorzystaniem zaawansowanej techniki mikroskopowej – mikroskopii różnicowania ogniskowego – oraz specjalistycznego oprogramowania komputerowego.

EN

In the paper there were presented the selected results of experimental investigations in the aim of analysis of stereometric characteristics of condition of active surface of the abrasive discs with grains Trizact™ after the grinding process of steel NC6. During investigations a focus-variation microscopy supported by the specialized software was used.

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Metody mikroskopowe w badaniach powietrza - od teorii do praktyki

Trykowski G., Biniak S.

Analityka : nauka i praktyka

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2008

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nr 1

22-27