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Abstract
In this work, bimetallic Cu-Ni catalysts supported on binary oxides containing ZnO, ZrO2, CeO2 and Al2O3 were investigated in hydrogen production via the oxidative steam reforming of methanol (OSRM). Their physicochemical properties were extensively studied using various methods such as BET, TPR-H2, TPD-NH3, XRD, SEM-EDS, ToF-SIMS and XPS. The reactivity measurements showed that the active phase and support composition played an important role in the activity of the catalyst in the OSRM. The most active system at higher temperatures was 30% Cu–10% Ni/CeO2·Al2O3, with high catalytic activity attributed to the Cu0.8Ni0.2 alloy formation. In addition, the reactivity results showed that the most active catalyst exhibited high acidity and was easily reduced. At low temperatures, the best catalytic properties were exhibited by 30% Cu–10% Ni/ZrO2·Al2O3. The reactivity and physicochemical properties of the studied catalysts confirmed the crucial role of alloy composition on their catalytic properties in the oxy-steam reforming of methanol. The obtained results validate the possibility of using Cu-Ni catalysts for hydrogen production.
Highlights
Today, the awareness and concerns regarding environmental pollution and greenhouse emissions are at their highest level
From the economics point of view, we chose Cu-Ni catalysts supported on binary oxides: ZnO·Al2 O3, CeO2 ·Al2 O3, ZrO2 ·Al2 O3
The main objective of this research was to optimize the composition of the catalyst for the highest efficiency in the process of methanol reforming with oxidative steam reforming
Summary
The awareness and concerns regarding environmental pollution and greenhouse emissions are at their highest level. This is a result of the progress of civilization and greater access to information. A most important problem remains the burning of traditional fossil fuels, which is the main source of carbon dioxide, and of other dangerous atmospheric pollutants such as nitrogen oxides, sulphur oxides and carbon monoxide. The use of alternative fuels is one solution to reduce fossil fuel consumption. For this reason, intense work is underway to become independent from oil extraction
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