Search results for: Marek Stolarski

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Jak działają najnowsze kolejowe systemy ochrony dzikich zwierząt

Marek Stolarski

Przegląd Komunikacyjny > 2023 > R. 78, nr 6/7/8 > 60--62

Aby skutecznie ostrzegać dzikie zwierzęta przed niebezpieczeństwem, jakim jest szybko jadący pociąg, konieczna jest wiedza z zakresu etologii, czyli wiedza o naturalnych zachowaniach zwierząt. Znajomość funkcjonowania zmysłów zwierząt oraz instynktów, które kierują ich zachowaniem, pozwala na dobór takich bodźców, który będzie rozumiany jako ostrzeżenie o nadciągającym niebezpieczeństwie i skłoni...

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Jak chronić dzikie zwierzęta i pociągi przed kolizjami na torach

Marek Stolarski, Dorota Bartoszek-Majewska

Przegląd Techniczny : Gazeta Inżynierska > 2022 > nr 11 > 28--30

Kolizje pociągów ze zwierzętami zdarzały się od powstania kolei, jednak dopiero przy większych prędkościach pociągów stanowią one poważny problem i zagrożenie dla ruchu kolejowego. Otoczenie linii kolejowych jest często atrakcyjne dla dzikich zwierząt, a sam pociąg jest dla nich zjawiskiem obojętnym, o ile nie znajdą się na torach. Artykuł prezentuje metody zapobiegania kolizjom stosowane w Polsce...

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Wpływ linii kolejowych na życie dzikich zwierząt

Marek Stolarski, Joanna Żyłkowska

Przegląd Komunikacyjny > 2022 > R. 77, nr 12 > 10--13

Linie kolejowe oddziałują na otaczającą przyrodę zarówno w fazie budowy lub modernizacji, jak i podczas eksploatacji. Śmiertelność zwierząt w wyniku kolizji jest coraz lepiej znanym oddziaływaniem, jednak zwykle dużo groźniejszy jest efekt barierowy, który następuje w wyniku grodzenia linii. Kolizje mają także inne aspekty: opóźnienia i uszkodzenia pociągów oraz zagrożenie bezpieczeństwa ruchu. Najczęściej...

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Animal Protection Devices UOZ – an answer to the global problem of animal-train collisions

Marek Stolarski, Dorota Bartoszek-Majewska, Joanna Żyłkowska

TTS Technika Transportu Szynowego > 2018 > R. 25, nr 9EN > 22--24

The probability of collisions with animals and their consequences depend on several factors, of which the speed and design of the train are very important. The problem of safety related to collisions concerns much more passenger trains than freight trains. Data obtained from carriers unambiguously indicate the growing scale of the problem – the number of incidents increases every year, as well as...

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Mathematical analysis of physicochemical phenomena in the catalyst during hydrogenating depolymerization of coal extract benzene insoluble fraction

Jerzy Szczygieł, Marek Stolarski

Chinese Journal of Chemical Engineering > 2015 > 23 > 6 > 962-973

Efficiency and selectivity of hydrogenating depolymerization of the coal extract benzene-insoluble part over the heterogeneous Co–Mo/Al ₂ O ₃ catalyst were assessed using a mathematical model. The analytical equations of the mathematical model were generated based on material balance incorporating the physico-chemical phenomena (reaction and diffusion) both in the autoclave and the...

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Hydrorefining of oil from rapeseed cake pyrolysis over NiMo/Al2O3 catalyst

Katarzyna Pstrowska, Jerzy Walendziewski, Marek Stolarski

Fuel Processing Technology > 2014 > 128 > C > 191-198

Bio-oil from rapeseed cake pyrolysis, bio-oil fraction boiling over 120°C and bio-oil blended with light gas oil fraction were submitted to the hydrorefining studies. The usability of NiMo/Al₂O₃ catalyst for pyrolytic oil hydrorefining was tested at the following parameters: temperature (290–350°C), LHSV (0.5–2.0h⁻¹) and 3MPa hydrogen pressure. The influence of hydrorefining parameters on the physicochemical...

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Hydroprocessing of rapeseed pyrolysis bio-oil over NiMo/Al2O3 catalyst

Katarzyna Pstrowska, Jerzy Walendziewski, Rafał Łużny, Marek Stolarski

Catalysis Today > 2014 > 223 > Complete > 54-65

Raw rapeseed bio-oil, bio-oil fraction boiling at the temperature over 120°C and bio-oil blend with non-desulfurized light gas oil fraction were submitted to hydrorefining studies. In this experiment use of NiMo/Al ₂ O ₃ as the selected catalyst for pyrolysis oil hydrorefining was tested at mild process parameter sets: temperature (260–350°C), LHSV (0.5–2.0h ⁻¹ ) and 3MPa hydrogen...

article

The Analysis of the Collisions of Rail Vehicles with Animals with Regard to the Railway Traffic Safety

Marek Stolarski, Joanna Żyłkowska

Logistics and Transport > 2014 > 22 > 49-56

Although animal-train collisions are common they are poorly recognised. They pose a threat to the passengers’ safety and also cause countable loss for railway operators in the form of rolling stock repairs and delays. The problem is much more significant in passenger transport due to the higher speed compared with cargo trains. The scale of damages caused by collisions also depends on the size of...

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Hydroprocesssing of light gas oil — rape oil mixtures

Jerzy Walendziewski, Marek Stolarski, Rafał Łużny, Bartłomiej Klimek

Fuel Processing Technology > 2009 > 90 > 5 > 686-691

Two series of experiments of hydroprocessing of light gas oil - rape oil mixtures were carried out. The reactor feed was composed of raw material: first series — 10 wt.% rape oil and 90 wt.% of diesel oil; second series — 20 wt.% rape oil and 80 wt.% of diesel oil.Hydroprocessing of both mixtures was performed with the same parameter sets, temperature (320, 350 and 380 °C), hydrogen pressure 3 and...

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The influence of preparation method on the physicochemical properties of titania–silica aerogels: Part two

Krzysztof Brodzik, Jerzy Walendziewski, Marek Stolarski, Luc Ginneken, more

Journal of Porous Materials > 2008 > 15 > 5 > 541-549

Titania–silica aerogels with different titania content were prepared. Four preparation methods differing mainly in approach to precursors hydrolysis were applied, while only three of them allowed total hydrolysis of silica precursor before titania precursor was added. The preparation of mixed products of titania and silica hydrolysis precursors containing gels was followed by high temperature supercritical...

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Photodegradation of organic compounds in water

Krzysztof Brodzik, Jerzy Walendziewski, Marek Stolarski

Polish Journal of Chemical Technology > 2007 > 9 > 3 > 130-133

The application of photocatalytic processes for the decontamination treatment of polluted water has inspired very extensive studies. Titanium dioxide with its large band gap energy and appropriate redox potential was found as one of the most promising semiconductors for the photodegradation of pollutants in the water as well as in gas phase. The titania-silica aerogels obtained by a simple co-hydrolysis...

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The influence of preparation method on the physicochemical properties of titania–silica aerogels

Krzysztof Brodzik, Jerzy Walendziewski, Marek Stolarski, Luc Ginneken, more

Journal of Porous Materials > 2007 > 14 > 2 > 219-226

A series of titania–silica aerogels with different compositions were prepared using four different preparation methods. The preparation steps were followed by a high temperature supercritical drying (HTSCD). It was found that application of ethanol and 2-propanol as the solvents for the titania precursor (with or without modification with acetyloacetone) resulted in materials with BET surface area...

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Supercritical fluid extracts from brown coal lithotypes and their group components-molecular composition of non-polar compounds

Franciszek Czechowski, Marek Stolarski, Bernd R.T. Simoneit

Fuel > 2002 > 81 > 15 > 1933-1944

The two Tertiary brown coals, i.e. xylitic brown coal (XBC) and humodetritous brown coal (HBC), from the 'Turow' and 'Konin' deposits in Poland and their group components were investigated on their behaviour to Soxhlet and supercritical fluid (SFE process) extractions. The raw coals were Soxhlet pre-extracted to remove unbound lipids (bitumens). Humic acids, lignin and cellulose were obtained from...

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Synthesis and Properties of Alumina Aerogels (II)

Jerzy Walendziewski, Marek Stolarski

Reaction Kinetics, Mechanisms and Catalysis > 2000 > 71 > 2 > 201-207

Synthesis of alumina aerogels was carried out by hydrolysis of aluminium isopropanolate and butanolate in benzene, methanol and isopropanol solutions as components of support precursors followed by gelation, drying under supercritical conditions and calcination. The influence of the type of precursor and solvent, synthesis temperature as well as drying and calcination temperature on bulk density,...

article

Mathematical analysis of the depolymerization of asphaltenes from coal extract

Jerzy Szczygieł, Marek Stolarski

Computers and Chemistry > 1998 > 21 > 6 > 369-375

Results of mathematical analysis of a catalytic process for hydrogenating depolymerization of asphaltenes obtained from coal extract is presented. The experiments analysed were carried out in an autoclave under pressures of 9.8-29.4 MPa at 673-733 K in the presence of a Polish commercial catalyst G-1 (Co,Mo/Al ₂ O ₃ ).The parameters of hydrogenation have been optimized and a hypothesis...

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Physicochemical properties and hydrogenation activity of nickel-alumina aerogels

Jerzy Walendziewski, Marek Stolarski, Mieczyslaw Steininger, Barbara Pniak

Reaction Kinetics and Catalysis Letters > 1996 > 58 > 1 > 85-90

Nickel-alumina aerogel catalysts were prepared by three methods: (I) hydrolysis of a mixture of aerogel precursors, followed by cogelation of the sols obtained and drying under supercritical conditions; (II) impregnation of thermally treated alumina aerogels with nickel salt solutions followed by drying of the suspensions obtained under supercritical or (III) conventional conditions. Activity of...

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