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Wyszukujesz frazę "dry reforming" wg kryterium: Temat


Wyświetlanie 1-6 z 6
Tytuł:
Microwave plasma for hydrogen production from liquids
Autorzy:
Czylkowski, D.
Hrycak, B.
Miotk, R.
Jasiński, M.
Mizeraczyk, J.
Dors, M.
Powiązania:
https://bibliotekanauki.pl/articles/148564.pdf
Data publikacji:
2016
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
dry reforming
ethanol
hydrogen production
isopropanol
kerosene
microwave plasma
Opis:
The hydrogen production by conversion of liquid compounds containing hydrogen was investigated experimentally. The waveguide-supplied metal cylinder-based microwave plasma source (MPS) operated at frequency of 915 MHz at atmospheric pressure was used. The decomposition of ethanol, isopropanol and kerosene was performed employing plasma dry reforming process. The liquid was introduced into the plasma in the form of vapour. The amount of vapour ranged from 0.4 to 2.4 kg/h. Carbon dioxide with the fl ow rate ranged from 1200 to 2700 NL/h was used as a working gas. The absorbed microwave power was up to 6 kW. The effect of absorbed microwave power, liquid composition, liquid fl ow rate and working gas fl ow rate was analysed. All these parameters have a clear infl uence on the hydrogen production effi ciency, which was described with such parameters as the hydrogen production rate [NL(H2)/h] and the energy yield of hydrogen production [NL(H2)/kWh]. The best achieved experimental results showed that the hydrogen production rate was up to 1116 NL(H2)/h and the energy yield was 223 NL(H2) per kWh of absorbed microwave energy. The results were obtained in the case of isopropanol dry reforming. The presented catalyst-free microwave plasma method can be adapted for hydrogen production not only from ethanol, isopropanol and kerosene, but also from different other liquid compounds containing hydrogen, like gasoline, heavy oils and biofuels.
Źródło:
Nukleonika; 2016, 61, 2; 185-190
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of alkaline promoters on the properties of the Ni/HAp catalyst in the methane dry reforming reaction
Autorzy:
Cichy, Marcin
Zawadzki, Witold
Powiązania:
https://bibliotekanauki.pl/articles/29521159.pdf
Data publikacji:
2023
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
hydrogen
synthesis gas
nickel catalyst
dry reforming
coking
alkaline promoter
Opis:
The reforming of methane with carbon dioxide is still of great interest due to the ever-increasing demand for synthesis gas and hydrogen. This process makes it possible to use two major gases that are considered harmful to the environment. The main problem for its commercial application is the lack of a catalyst that is both active, selective towards syngas (a mixture of hydrogen and carbon monoxide) and resistant to deactivation by coke deposition. Nickel is the most commonly used metal in methane reforming reactions due to its high activity and reasonable price. But still there is a gap in the literature for research on novel catalysts and their properties modifications devoted to strategies to reduce deactivation of the catalysts caused by the coke formation. In the present work a series of hydroxyapatite supported nickel catalysts promoted by alkali metals (Li, Na, K and Cs) were tested. The surface and structural properties of the catalysts were well characterized by physicochemical methods. Activity and selectivity were measured at 600ºC for 20 hours’ time-on-stream test. Resistance to coking was measured with Magnetic Suspension Balance. The stability of the catalyst was improved by the addition of promoters, which reduced the rate of coking. In particular, the cesium-promoted Ni/HAp catalyst significantly inhibited coke deposition, while slightly reducing methane conversion and selectivity to hydrogen.
Źródło:
Physicochemical Problems of Mineral Processing; 2023, 59, 4; art. no. 182856
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dry and steam reforming of methane. Comparison and analysis of recently investigated catalytic materials. A short review.
Autorzy:
Summa, Paulina
Samojeden, Bogdan
Motak, Monika
Powiązania:
https://bibliotekanauki.pl/articles/779028.pdf
Data publikacji:
2019
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
dry methane reforming
steam methane
reforming
nickel catalyst
hydrotalcite
Opis:
In order to produce valuable syngas, industrial processes of dry reforming of methane and steam reforming of methane must be further developed. This paper is focused on reviewing recently examined catalysts, supporting the mentioned technologies. In both processes the most popular active material choice is usually nickel, due to its good availability. On the other hand, noble metals, such as ruthenium, rhodium or platinum, provide better performance, however the solution is not cost-effective. Materials used as a support influence the catalytic activity. Oxides with basic properties, such as MgO, Al2 O3 , CeO2 , are frequently used as carriers. One of the most promising materials for reforming of methane technologies are hydrotalcites, due to adjustable composition, acid-base properties and possibility of incorporation of various metals and complexes.
Źródło:
Polish Journal of Chemical Technology; 2019, 21, 2; 31-37
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Procesy chemiczne i elektrochemiczne w wybranych nowych technologiach gazu ziemnego
Chemical and electrochemical processes in some new technologies of natural gas
Autorzy:
Warowny, W.
Siemek, J.
Powiązania:
https://bibliotekanauki.pl/articles/299731.pdf
Data publikacji:
2007
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
Tematy:
reforming gazu ziemnego
suchy reforming
paliwa z gazu syntezowego
technologia GTL
ogniwa paliwowe
natural gas reforming
dry reforming
synthesis gas fuels
GTL technology
fuel cells
Opis:
W pracy przedstawiono podstawowe informacje dotyczące chemicznej konwersji gazu ziemnego, w tym reakcje konwersji metanu i rysunek z produktami konwersji gazu ziemnego. Opisano skrótowo kilka technologii dla gazu ziemnego, wśród nich: przetwórstwo gazu ziemnego na paliwa ciekłe (GTL), jego suchy reforming oraz (poprzez gaz syntezowy) produkcję wodoru, metanolu, eteru dwumetylowego (DME) i dodatków motoryzacyjnych. Dodatkowo podano elektrochemiczne procesy zachodzące w ogniwach paliwowych.
This paper contains basic information for chemical conversion of the natural gas, including reforming reactions of methane and picture with gathered reforming products of natural gas. Few new selected natural gas technologies have been shortly described, among them: gas to liquid (GTL), dry reforming, production (via synthesis gas) of the hydrogen, methanol, and dimethyl ether (DME) and some motor additions. Additionally, electrochemical processes for fuel cells have been given.
Źródło:
Wiertnictwo, Nafta, Gaz; 2007, 24, 2; 915-927
1507-0042
Pojawia się w:
Wiertnictwo, Nafta, Gaz
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling of methane dry reforming over Ni/CaO–Al2O3 catalyst
Autorzy:
Cherbański, Robert
Lewak, Michał
Machniewski, Piotr
Molga, Eugeniusz
Franczyk, Ewelina
Powiązania:
https://bibliotekanauki.pl/articles/2086791.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
dry methane reforming
dimethyl ether
nickel catalyst
kinetics
modelling
eter dimetylowy
katalizator niklowy
kinetyka
modelowanie
Opis:
This paper presents the results of investigations into dry methane reforming (DMR). The process was aimed at obtaining synthesis gas required for the production of dimethyl ether (DME). The effect of temperature, pressure and inlet gas composition on the process was determined in the experimental part of this work. The tests were carried out in a laboratory tubular reactor over a Ni/CaO–Al2O3 catalyst. The obtained experimental results were used to verify literature kinetic data and to develop a mathematical model of the DMR process.
Źródło:
Chemical and Process Engineering; 2021, 42, 3; 235--252
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Model Approach of Carbon Deposition Phenomenon in Steam and Dry Methane Reforming Process
Modelowanie zjawiska wytrącania węgla w procesie parowego i suchego reformingu metanu
Autorzy:
Kaczmarczyk, R.
Gurgul, S.
Powiązania:
https://bibliotekanauki.pl/articles/355496.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
steam and dry reforming of methane
carbon deposition
parametric equations
homogeneous reactions described by model of parametric equations
parowy i suchy reforming metanu
wytrącanie węgla
równania parametryczne
jednorodne reakcje opisane przez równania parametryczne modelu
Opis:
This paper presents thermodynamic conditions for carbon deposition in steam and dry methane reforming process. Ranges of substrate concentrations and temperatures for creating carbon deposition were specified in an analytical form. In the description of the conversion of methane CH4-H2O and CH4-CO2 parametric equations were used, which allowed to define equilibrium composition of the process. The article formulates the basic assumptions of parametric equations models and their use to describe the course of the homogeneous reactions. The results may provide a model basis for the description of properties of the mixed reforming process CH4-H2O-CO2.
W prezentowanej pracy przedstawiono termodynamiczny warunek wytracania wegla w procesie parowego i suchego reformingu metanu. Określono zakresy stężenia substratów i temperatury tworzenia depozytów węglowych w postaci analitycznej. Opis konwersji metanu CH4-H2O i CH4-CO2 zrealizowano z wykorzystaniem formalizmu równań parametrycznych, pozwalającego na określenie składu równowagowego zachodzącego procesu. Przedstawiono podstawowe założenia modelu równań parametrycznych oraz ich wykorzystanie do opisu przebiegu reakcji homogenicznych. Uzyskane wyniki mogą stanowić bazę modelowa do opisu własności procesu reformingu mieszanego CH4-H2O-CO2.
Źródło:
Archives of Metallurgy and Materials; 2014, 59, 1; 145-148
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

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