Search results

1

Temperature development of selected materials in a reduced model – experimental test

100%

Müllerová J., Krajčír M.

Kultura Bezpieczeństwa. Nauka – Praktyka – Refleksje

|

2020

|

vol. 38

79-88

EN

The work is focused on an experimental test of temperature development in a scale model. Various types of combustible materials were used in the test in combination with the spruce wood. The work points to the influence of the fuel source on selected parameters of a fire in an enclosed space. The course of a fire is influenced by various factors. The course of a fire in an enclosed space differs from the course of a fire in an open space. As a part of the overall development of the fire, the temperature of the fire is affected. Therefore, one can state that the parameters affecting the development of an internal fire also have a direct effect on the temperature development. The main goal of this work is to compare different types of materials in terms of the properties they manifest during a fire. The practical part contains the analysis of the materials used in the experiment. Description of the scale model and of the measuring control panel are the content of another part of the work. In the end there is a comparison of the individual temperature curves.

2

The kinetics of nitrogen oxides formation in the flame gas

75%

Zajemska M., Poskart A., Musiał D., Paradowska M., Platje J. J.

Economic and Environmental Studies

|

2015

|

vol. 15

|

issue 4(36)

445-460

EN

This paper treats about the problem of nitrogen oxides formation in the process of natural gas combustion. The analysis of the influence of selected combustion parameters on the concentration of NO, N2O and NO2 in the combustion products was done. From many factors determining NOx formation two was selected, ie temperature and residence time at the highest temperature zone, considering them to be particularly important. Detailed analysis of the absolute rate of NOx for various combustion temperatures was done with the use of commercial software CHEMKIN-PRO. Moreover, the paths of formation of above- mentioned compounds were determined. The main goal of the research is to analyze the impact of selected parameters of combustion process, such as temperature, on formation of thermal nitrogen oxides, with special emphasis on the chemistry of the process. The use of numerical methods to predict the products of combustion process, especially NOx, is of great importance in terms of ecological and economical aspects

PL

W niniejszym artykule poruszono problematykę formowania tlenków azotu w procesie spalania gazu ziemnego. Przeanalizowano wpływ wybranych parametrów spalania na udział NO, N2O i NO2 w produktach spalania. Spośród wielu czynników determinujących tworzenie się NOx wybrano dwa, a mianowicie temperaturę i czas przebywania w strefie najwyższych temperatur, uznając je jako szczególnie istotne. Za pomocą komercyjnego oprogramowania CHEMKIN-PRO dokonano szczegółowej analizy absolutnej szybkości NOx dla różnych temperatur spalania. Ponadto, sporządzono ścieżkę formowania ww. związków. Zasadniczym celem badań jest analiza wpływu wybranych parametrów procesu spalania, takich jak temperatura, na formowanie termicznych tlenków azotu, ze szczególnym uwzględnieniem chemii procesu. Wykorzystanie metod numerycznych do przewidywania produktów spalania, m.in. NOx, jest niezwykle istotne w aspekcie ekologicznym i ekonomicznym.

3

The determination of contaminants in ashes produced after the combustion of wood pellets using optical petrography

63%

Jelonek Z., Nocoń A., Jelonek I., Jach-Nocoń M., Jelonek Z., Nocoń A., Jelonek I., Jach-Nocoń M.

Zeszyty Naukowe Instytutu Gospodarki Surowcami Mineralnymi Polskiej Akademii Nauk

|

2018

4

Chemia Jędrzeja Śniadeckiego

32%

Lichocka H.

Opuscula Musealia

|

2019

|

vol. 26

21-34

EN

In Poland, Jędrzej Śniadecki was a continuator and one of the promoters of the French school of chemistry, initiated by the works of Antoine Lavoisier. Śniadecki came into contact with the foundations of this school, which included a new definition of the chemical elements, the principle of mass conservation and the oxygen theory of combustion, while still studying at the university in Kraków. His later studies at European universities and his knowledge of the most recent literature ultimately channelled his views on chemistry. This was reflected in Śniadecki’s academic publications, in particular in his textbook: Początki chemii: stosownie do teraźniejszego tey umiejętności stanu dla pożytku uczniów i słuchaczów ułożony y za wzór lekcyi akademickich służyć mające (The Beginnings of Chemistry: Composed in Accordance with the Current State of This Skill for the Benefit of Students and Auditors to Be Used as a Model for Academic Classes) Vilnius, 1800. It was the first original chemistry textbook in the Polish language. The author used his own chemical terminology, modelled after the new French terminology. The Polish systemic chemical terminology, which conveyed information about the type and composition of a given substance, had been introduced by Śniadecki three years earlier, during his lectures at Vilnius University. The names proposed by Śniadecki caught on and were used in Poland for several decades. Jędrzej Śniadecki’s original contribution to global science was his theory that explained the phenomenon of life and the interdependencies between matter in the animate and inanimate world. This theory, published in the years 1804–1811, in Warsaw in three parts, was translated into German and French. The Polish edition was entitled Jędrzeja Śniadeckiego medycyny doktora Teoria jestestw organicznych ( Theory of Organic Beings by Jędrzej Śniadecki, Medical Doctor). The first part was of great significance for the development of organic chemistry. When this work is compared with later publications by Justus Liebig, it can be shown that Śniadecki’s views had an impact on the writings of this German scholar.

Refine search results

1 Economic and Environmental Studies

1 Kultura Bezpieczeństwa. Nauka – Praktyka – Refleksje

1 Opuscula Musealia

1 Zeszyty Naukowe Instytutu Gospodarki Surowcami Mineralnymi Polskiej Akademii Nauk

1 Jach-Nocoń M.

1 Jelonek I.

1 Jelonek Z.

1 Krajčír M.

1 Lichocka H.

1 Musiał D.

1 Müllerová J.

1 Nocoń A.

1 Paradowska M.

1 Platje J. J.

1 Poskart A.

1 Zajemska M.

1 2020

1 2019

1 2018

1 2015

Temperature development of selected materials in a reduced model – experimental test

The kinetics of nitrogen oxides formation in the flame gas

The determination of contaminants in ashes produced after the combustion of wood pellets using optical petrography

Chemia Jędrzeja Śniadeckiego