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.

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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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Rozwój metod pomiarowych błędów przędzy

Lewandowski S., Józkowicz I., Jaros M.

Przegląd Włókienniczy - Włókno, Odzież, Skóra

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2016

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nr 1

17--21

EN

The problem of formation, eradication and assessment of yarn faults, many years located in the center of interest of many research institutes, spinning factories and spinning laboratories and makes up an object of numerous theoretical and experimental researches. To assess deficiencies previously used labor-intensive and subjective organoleptic methods whose effectiveness can be guestioned particularly for smaller common hidden faults. Currently, devices constructed of electro-mechanical, electro-capacitive and electro-optical action counting errors for us and they are very often connected with devices that automatically cut out the place loaded with defects and reconnect the ends of the yarn. We present the history of the development of methods of measurement defects of yarns and we describe the various instrumental methods of measurement of rare occurred yarn faults.