Wszystkie pola: carbon deposit - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Carbon Deposit Formation in Normal-Pressure Electrical Discharges in Hydrocarbons
Autorzy:: Sobczyk, A.
Jaworek, A.
Powiązania:: https://bibliotekanauki.pl/articles/1807543.pdf
Data publikacji:: 2009-12
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 52.77.Fv
52.80.Mg
81.05.Lg
Opis:: The process of synthesis of carbon deposits from hydrocarbon vapours in low-current electrical-discharge plasma was investigated in the paper. The carbon deposits were effectively synthesised in discharge of positive polarity generated between a stainless steel needle and a plate made of nickel alloy, for the discharge current ranged from 0.1 mA up to 3 mA. The experiments were carried out at normal pressure in cyclohexane vapours with argon as carrier gas. The process of synthesis of carbon deposits was investigated using optical emission spectroscopy.
Źródło:: Acta Physica Polonica A; 2009, 116, S; S-136-S-138
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: The modeling of the heat loads in the exhaust valve from and without regard of the carbon deposit
Autorzy:: Jędrusik, D.
Gustof, P.
Powiązania:: https://bibliotekanauki.pl/articles/243988.pdf
Data publikacji:: 2010
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Tematy:: numerical techniques
analysis and modelling of heat loads
valve
carbon deposit
FEM
Opis:: This paper presents the modelling of the heat loads in the exhaust valve from and without regard of carbon deposit in initial phase of work of the turbocharged Diesel engine by using the two-zone combustion model, finite elements method (FES) and program Cosmos/M. In order to illustrate the problem the valve face is divided into two equal areas, then it was assumed that one of them is covered with a thin layer of carbon deposit. Modelling was conducted based on the boundary conditions III kind as a function of time, which describes the convective heat transfer coefficient and the temperature of the surrounding surfaces of valve. As a result of the calculations was compared obtained temperature distribution on the surfaces of the valve - with and without carbon deposit. The study also performed an analysis of the stress distribution that arises in the valve by the presence of the carbon deposit on the surface of the face valve. The analysis showed that the face valve heats up unevenly, more slowly on the side of the carbon deposit. Moreover small increase of the temperature causes the increase of the stress values. Maximum values of stresses do not appear in a valve face under a layer of carbon deposit but on the line distributing the surface covered with carbon deposit and without carbon deposit, near the valve face. These stresses cause the growth of microcracks in the area of the valve face, which finally give occasion to the defect of material, the damage of the valve and engine failure
Źródło:: Journal of KONES; 2010, 17, 3; 173-179
1231-4005
2354-0133
Pojawia się w:: Journal of KONES
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Technology for development of methane-hydrate deposits jointly with receiving fresh water
Autorzy:: Denysov, Y.
Klymenko, V.
Martynenko, V.
Rybicki, Cz.
Powiązania:: https://bibliotekanauki.pl/articles/298671.pdf
Data publikacji:: 2017
Wydawca:: Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:: gas hydrates
gas hydrate deposit
methane
carbon dioxide
fresh water
exergy efficiency
economic efficiency
Opis:: The technology of development of bottom gas-hydrate deposits, which allows to receive fresh water simultaneously with methane, is presented. Principal schemes are presented and methods of operation of dualpurpose plants implementing this technology and described on the basis of the methods of gas production from methane hydrates that are most prepared for practical implementation: 1) injection of warm water into the well; 2) depressive effect on the deposit; 3) replacement of methane in hydrates with carbon dioxide injected into the reservoir. The magnitude of the decrease in temperature with the depression effect on the deposit is determined. It is shown that, the amount of fresh water obtained in dual-purpose plants operating with the replacement of methane in hydrates with carbon dioxide is proportional to the coefficient of the recycling rate of CO2. For the considered schemes of dual-purpose plants, processes of decomposition of methane hydrates in the gas-hydrate formation are analyzed, an exergic efficiency estimation is performed. Such installations. The economic efficiency of a single-purpose and dual-purpose gas-producing units operating according to an approved method of depression is considered. It is shown that the most effective are dual-purpose facilities operating using the method of methane replacement in hydrates with carbon dioxide, and the coefficients of economic efficiency of dual-purpose installations are at least 1.2 times higher than similar coefficients of single-purpose gas production facilities.
Źródło:: AGH Drilling, Oil, Gas; 2017, 34, 2; 531-542
2299-4157
2300-7052
Pojawia się w:: AGH Drilling, Oil, Gas
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Carbon Monolith Surface Chemistry Influence on the Silver Deposit Amount and Crystallite Size
Autorzy:: Vukčević, M.
Kalijadis, A.
Jovanović, Z.
Laušević, Z.
Laušević, M.
Powiązania:: https://bibliotekanauki.pl/articles/1503488.pdf
Data publikacji:: 2011-08
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 81.05.U-
81.65.-b
68.35.Dv
81.15.-z
Opis:: The surface of carbon monolith (CM) was chemically treated in order to obtain antibacterial filters with silver deposit for water treatment. The chemical treatment involved submerging the as-received CM in $HNO_{3},$ $KOH$ and $H_{2}O_{2}$ solution. The specific surface area was examined by $N_{2}$ adsorption. Silver deposition at the surface of CM samples was performed using cheap and simple procedure of immersing CM samples in aqueous solution of $AgNO_{3}$. Temperature programmed desorption method has been used in order to investigate the nature and thermal stability of surface oxygen groups before and after silver deposition. The composition and crystalinity of silver deposits have been examined by X-ray diffraction. Chemical treatment does not cause any drastic changes of CM specific surface area, but increases a total amount of surface oxides. Amount of deposited silver is several times higher for all chemically treated samples. The results show that increasing the amount of CO yielding groups on CM surface leads to increased amount of Ag deposit and decreases its crystallite sizes
Źródło:: Acta Physica Polonica A; 2011, 120, 2; 284-288
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Migration assessment of natural gas components in the Borzecin deposit based on results of hydrogen and carbon stable isotope analyzes
Ocena migracji składników gazu ziemnego w złożu Borzęcin na podstawie wyników analiz izotopów trwałych wodoru i węgla
Autorzy:: Pleśniak, Ł.
Orion-Jędrysek, M.
Jakubiak, M.
Bucha, M.
Krajniak, J.
Matusewicz, M.
Kufka, D.
Matyasik, I.
Janiga, M.
Lojen, S.
Zigon, S.
Powiązania:: https://bibliotekanauki.pl/articles/1835283.pdf
Data publikacji:: 2017
Wydawca:: Instytut Nafty i Gazu - Państwowy Instytut Badawczy
Tematy:: wzmożone wydobycie gazu
metan
ditlenek węgla
izotopy trwałe
enhanced gas recovery
methane
carbon dioxide
stable isotopes
Opis:: One of the first installations in the World, based on the EGR (Enhanced Gas Recovery) operates in Borzecin (SW Poland). Thus creating the opportunity to gather experience in the development of CCS (Carbon Capture and Storage) on an industrial scale. Due to the small size of the deposit, the technology allows great research opportunity to develop Enhanced Gas Recovery and all the processes associated with the injection of CO2 and H2S are possible to observe in a relatively short time scale. The main goal of the research is tracing migration fronts of injected gases threw sampling and isotopic analysis of gases from numeral boreholes. Gathered results gave the opportunity to get an appraisal of gas migration in the Borzecin deposit. Consequently a new tool for Enhanced Gas Recovery efficiency might be constructed with the potential of being applied in CCS technologies. Isotopic composition of hydrogen (n = 63) in methane varied from –159.3 to –85.2‰ (average –114.6‰) and isotopic composition of carbon including methane (n = 92) varied from –46.93 to –17.87‰ (average –35.22‰). Isotopic composition of carbon in carbon dioxide (n = 88) varied from –23.33 to –3.11‰ (average –13.35‰).
Jedna z pierwszych instalacji EGR (ang. Enhanced Gas Recovery – wzmożonego wydobycia gazu) na świecie funkcjonuje na złożu Borzęcin (SW Polska). Instalacja umożliwia zebranie doświadczenia w rozwoju technologii CCS (ang. Carbon Capture and Storage – wychwyt, transport oraz trwała izolacja CO2) na skalę przemysłową. Ze względu na niewielkie rozmiary złoża technologia ta daje możliwość rozwoju badawczego EGR, przy czym wszystkie procesy związane z zatłaczaniem ditlenku węgla i siarkowodoru są możliwe do obserwacji w stosunkowo niedługiej skali czasu. Głównym celem badań była próba oceny migracji zatłaczanych gazów poprzez pobór i analizę izotopów trwałych wodoru i węgla w gazach z poszczególnych otworów wiertniczych. Dzięki uzyskanym wynikom możliwa jest ocena migracji składników gazu ziemnego w złożu Borzęcin. W rezultacie przeprowadzonych badań otrzymano nowe narzędzie do oceny efektywności wzmożonej eksploatacji gazu, które następnie może być zastosowane w technologiach związanych z CCS. Skład izotopowy wodoru (n = 63) w metanie mieścił się w zakresie od –159,3‰ do – 85,2‰ (średnia –114,6‰), a skład izotopowy węgla (n = 92) w tym metanie wyniósł od –46,93‰ do –17,87‰ (średnia –35,22‰). Skład izotopowy węgla (n = 88) w ditlenku węgla osiągnął wartość od –23,33‰ do –3,11‰ (średnia –13,35‰).
Źródło:: Nafta-Gaz; 2017, 73, 1; 27-35
0867-8871
Pojawia się w:: Nafta-Gaz
Dostawca treści:: Biblioteka Nauki

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