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Wyszukujesz frazę "Methanol" wg kryterium: Temat


Wyświetlanie 1-5 z 5
Tytuł:
Copper/zinc catalysts in hydrogenation of carbon oxides
Autorzy:
Kulawska, M.
Madej-Lachowska, M.
Powiązania:
https://bibliotekanauki.pl/articles/184893.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
Cu-based catalysts
methanol synthesis
steam reforming of methanol
higher aliphatic
alcohol synthesis
dimethyl ether
katalizator Cu
synteza metanolu
synteza alkoholu
eter dimetylowy
Opis:
A review concerning main processes of hydrogenation of carbon oxides towards synthesis of methanol, mixture of methanol and higher aliphatic alcohols and one-step synthesis of dimethyl ether as well as methanol steam reforming is given. Low-temperature methanol catalysts and low-temperature modified methanol catalysts containing copper as primary component and zinc as secondary one are described.
Źródło:
Chemical and Process Engineering; 2013, 34, 4; 479-496
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
One-dimensional isothermal multicomponent diffusion-reaction model and its application to methanol synthesis over commercial Cu-based catalyst
Autorzy:
Lei, K.
Ma, H.
Zhang, H.
Ying, W.
Fang, D.
Powiązania:
https://bibliotekanauki.pl/articles/778972.pdf
Data publikacji:
2015
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
global kinetics
internal effectiveness factor
diffusion-reaction model
methanol synthesis
Opis:
The present work was a study on global reaction rate of methanol synthesis. We measured experimentally the global reaction rate in the internal recycle gradientless reactor over catalyst SC309. The diffusion-reaction model of methanol synthesis was suggested. For model we chose the hydrogenation of CO and CO2 &enspas key reaction. CO and CO2 &enspwere key components in our model. The internal diffusion effectiveness factors of CO and CO2&enspin the catalyst were calculated by the numerical integration. A comparison with the experiment showed that all the absolute values of the relative error were less than 10%. The simulation results showed that decreasing reaction temperature and catalyst diameter were conducive to reduce the influence of the internal diffusion on the methanol synthesis.
Źródło:
Polish Journal of Chemical Technology; 2015, 17, 1; 103-109
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation study of an auto-thermal double-membrane reactor for the simultaneous production of hydrogen and methanol: comparison of two different hydrogen redistribution strategies along the reactor
Autorzy:
Rahmani, F.
Haghighi, M.
Estifaee, P.
Rahimpour, M. R.
Powiązania:
https://bibliotekanauki.pl/articles/779084.pdf
Data publikacji:
2017
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
pure hydrogen production
methanol synthesis
auto-thermal double-membrane reactor
steady-state heterogeneous model
operation mode
Opis:
In a continuing effort to realize the simultaneous hydrogen and methanol production via the auto-thermal methanol synthesis process, the effect of two different hydrogen redistribution strategies along a double-membrane reactor has been considered. A steady-state one-dimensional heterogeneous model was developed to compare two strategies applied in the operation of the auto-thermal methanol synthesis. It was found that the counter-current configuration exhibited the better performance compared to the reactor operated in the co-current mode from both the economic and environmental points of view. This superiority is ascribed to the establishment of a more favourable temperature profile along the reactor and also more hydrogen extraction from the reaction zone. Moreover, the influence of some operating variables was investigated on the performance of the auto-thermal double-membrane reactor in the counter-current configuration. The results suggest that utilizing this configuration for pure hydrogen and methanol production could be feasible and beneficial.
Źródło:
Polish Journal of Chemical Technology; 2017, 19, 2; 115-124
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Kinetic characterisation of catalysts for methanol synthesis
Autorzy:
Ledakowicz, S.
Nowicki, L.
Petera, J.
Nizioł, J.
Kowalik, P.
Gołębiowski, P.
Powiązania:
https://bibliotekanauki.pl/articles/185511.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
methanol synthesis
copper base catalyst
kinetics
Zr and Mg doping
synteza metanolu
katalizator na bazie miedzi
kinetyka
Opis:
The results of activity studies of four catalysts in methanol synthesis have been presented. A standard industrial catalyst TMC-3/1 was compared with two methanol catalysts promoted by the addition of magnesium and one promoted by zirconium. The kinetic analysis of the experimental results shows that the Cu/Zn/Al/Mg/1 catalyst was the least active. Although TMC-3/1 and Cu/Zn/Al/Mg/2 catalysts were characterised by a higher activity, the most active catalyst system was Cu/Zn/Al/Zr. The activity calculated for zirconium doped catalyst under operating conditions was approximately 30% higher that of TMC-3/1catalyst. The experimental data were used to identify the rate equations of two types – one purely empirical power rate equation and the other one - the Vanden Bussche & Froment kinetic model of methanol synthesis. The Cu/ZnO/Al2O3catalyst modified with zirconium has the highest application potential in methanol synthesis.
Źródło:
Chemical and Process Engineering; 2013, 34, 4; 497-506
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Synteza metanolu z ditlenku węgla i wodoru na bazie katalizatora CuO/ZnO/ZrO2 z dodatkami
Methanol Synthesis from Carbon Dioxide and Hydrogen over CuO/ZnO/ZrO2 promoted catalysts
Autorzy:
Madej-Lachowska, A.
Kasprzyk-Mrzyk, A.
Moroz, H.
Lachowski, A. I.
Wyżgoł, H.
Powiązania:
https://bibliotekanauki.pl/articles/1215619.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem
Tematy:
synteza metanolu
katalizator CuO/ZnO/ ZrO2
promotory – Ce, Cr, Ga, La, Pd
methanol synthesis
Cu/ZnO/ZrO2 catalyst
Ce, Cr, Ga, La, Pd promoters
Opis:
Przeprowadzono badania wpływu promotorów Ce, Cr, Ga, La i Pd na aktywność katalizatora CuO/ZnO/ZrO2 w procesie syntezy metanolu z CO2 i H2. Katalizator otrzymano metodą homogenizacji z zastosowaniem kwasu cytrynowego wprowadzając niewielkie ilości promotorów. Aktywność katalizatorów badano prowadząc pomiary w ciśnieniowym reaktorze rurowym o stałym złożu katalizatora. Wykazano pozytywny wpływ promotorów, zwłaszcza Ga, La, Ce oraz Cr, na aktywność i selektywność katalizatora w badanym procesie.
It has been well documented that the CuO/ZnO/ZrO2 catalyst shows high activity in the methanol synthesis from CO2 and H2. The CuO/ZnO/ZrO2 based catalysts were obtained by decomposing the citrate complexes, by adding small amount of promoters – Ce, Cr, Ga, La, Pd in order to improve the new catalyst’s catalytic properties. The catalytic activity was measured using a tubular high-pressure fixed bed reactor. The promoters were found to improve the catalytic activity and stability in the reaction of methanol synthesis from carbon dioxide and hydrogen. The positive influence of promoters, especially Ga, La, Ce and Cr on the activity and selectivity of the developed catalysts in the investigated process has been demonstrated.
Źródło:
Chemik; 2014, 68, 1; 61-68
0009-2886
Pojawia się w:
Chemik
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-5 z 5

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