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1
Content available Methanol as a High Purity Hydrogen Source for Fuel Cells: A Brief Review of Catalysts and Rate Expressions
Madej-Lachowska M., Kulawska M., Słoczyński J.
Chemical and Process Engineering
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2017
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Vol. 38, nr 1
147--162
EN
Hydrogen is the fuel of the future, therefore many hydrogen production methods are developed. At present, fuel cells are of great interest due to their energy efficiency and environmental benefits. A brief review of effective formation methods of hydrogen was conducted. It seems that hydrogen from steam reforming of methanol process is the best fuel source to be applied in fuel cells. In this process Cu-based complex catalysts proved to be the best. In presented work kinetic equations from available literature and catalysts are reported. However, hydrogen produced even in the presence of the most selective catalysts in this process is not pure enough for fuel cells and should be purified from CO. Currently, catalysts for hydrogen production are not sufficiently active in oxidation of carbon monoxide. A simple and effective method to lower CO level and obtain clean H2 is the preferential oxidation of monoxide carbon (CO-PROX). Over new CO-PROX catalysts the level of carbon monoxide can be lowered to a sufficient level of 10 ppm.
2
Content available Zastosowanie katalizatorów miedziowych w procesie rozkładu metanolu
Madej-Lachowska M., Moroz H., Wyżgoł H., Hamryszak Ł.
Prace Naukowe Instytutu Inżynierii Chemicznej Polskiej Akademii Nauk
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2016
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nr 20
175--188
PL
Przeprowadzono badania zastosowania katalizatorów miedziowych do produkcji wodoru w procesie rozkładu metanolu. Badano katalizatory w postaci tlenków metali CuOZnOZrO2 z dodatkami tlenku galu, chromu oraz chromu i ceru, a także katalizator CuOZnOAl2O3 promowany tlenkiem cyrkonu. Najwyższą wydajność wodoru wykazują katalizatory: CuOZnOAl2O3 promowany tlenkiem cyrkonu oraz katalizator CuOZnOZrO2 z dodatkiem tlenku galu. Stwierdzono, iż katalizator wytworzony metodą hydrotalkitową wykazuje najlepszą aktywność w badanym procesie.
EN
The studies of Cu catalyst usage in a hydrogen production in the methanol decomposition process were performed. Oxide metal of CuOZnOZrO2-based catalysts with Ga, Cr and Ce additives and CuOZnOAl2O3-based ones promoted by Zr were investigated. The highest hydrogen yield was achieved with CuOZnOAl2O3ZrO2 catalysts and CuOZnOZrO2Ga2O3 ones. It was established that the catalyst produced by hydrotalcite method showed the best activity.
3
Methanol Synthesis from CO2 and H2 Mixture over 60 per cent Cu/support (FeAlO3, ZnAl2O4) Catalysts
Maniecki T. P., Mierczyński P., Bawolak-Olczak K., Jóźwiak W. K.
Polish Journal of Chemistry
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2009
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Vol. 83, nr 9
1653-1662
EN
The aim of this work was to determine the correlation between catalytical activity of copper supported catalysts 60 per cent Cu/support (FeAlO3, ZnAl2O4) in methanol synthesis and their physicochemical properties. Surface area measurements (BET), X-ray diffraction (XRD) and temperature-programmed reduction (TPR-H2) techniques were used to study the physicochemical properties of Cu/support catalysts. The activity tests in methanol synthesis were carried out over copper catalysts in the temperature range 180–260 graduate C at elevated pressure (4 MPa) in a fixed bed reactor. Monometallic supported catalyst 60 per cent Cu/FeAlO3 was more active, but less selective in comparison with 60 per cent Cu/ZnAl2O4 catalyst in methanol synthesis. The XRD results confirmed the presence of binary oxide (ZnAl2O4 and FeAlO3), copper oxide, alfa-Fe2O3 and ZnO for appreciate copper supported catalysts. A reduction study of copper catalyst confirmed two step of copper oxide reduction (Cu2+ rightwards arrow Cu+rightwards arrow Cu0).
4
Methanol Synthesis from Mixture of CO, CO2 and H2 under Atmospheric Pressure over Au, Ag-Cu/FeAlO3 Supported Catalysts
Maniecki T. P., Mierczyński P., Maniukiewicz W., Bawolak K., Gebauer D., Jóźwiak W. K.
Polish Journal of Chemistry
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2008
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Vol. 82, nr 12
2379-2388
EN
The influence of copper and noble metal (Ag, Au) addition on the physicochemical properties of support FeAlO3 and supported metal catalysts was studied. The reaction of methanol formation in the temperature range 200-380 graduate C under atmospheric pressure over a series of Cu and M-Cu catalysts (where M = Ag, Au) has been investigated. The presence of spinel like type structures FeAlO3, Fe2AlO4 and FeAl2O4 was confirmed by XRD technique. The physicochemical properties of supports and supported copper and bimetallic Ag, Au-Cu/FeAlO3 catalysts were examined by BET, TPR, and XRD methods.
5
Content available remote Metody wyznaczania powierzchni aktywnej katalizatorów miedziowych. Badania porównawcze
Kowalik P., Próchniak W., Borowiecki T.
Przemysł Chemiczny
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2007
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T. 86, nr 5
433-436
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