Production of hydrogen from methanol over Cu/ZnO catalysts promoted by ZrO2 and Al2O3

Methanol steam reforming behavior of copper impregnated over CeO 2 –ZrO 2 derived from a surfactant assisted coprecipitation route

“…The similar partial reduction of copper has been also recently observed in Cu/CeO2 catalysts [48]. The partially reduced copper (Cu þ ) thus formed is subsequently stabilized by zirconia on the catalyst surface and are in agreement with some studies in the literature for steam reforming reactions up to 300 o C [18,28,49]. We have thus proposed formation of partly reduced CeeZr phase during MSR and in the aged sample in Fig.…”

“…This is in contrast to the XPS surface atomic concentration of copper (see Table 2) that increases from AP to aged and regn samples. This is an indication that not only surface copper atom but also other factors are affecting the reforming activity [18]. On ageing and regeneration there may be decreased interaction between copper and support and some loss of reducibility as well [8,27].…”

“…On ageing and regeneration there may be decreased interaction between copper and support and some loss of reducibility as well [8,27]. It is also reported that the "quality" of copper surface is an important factor for MSR activity [11,18].…”

Hydrogen Utilization in Green Fuel Synthesis via CO2 Conversion to Methanol over New Cu-Based Catalysts

“…Metal Surface Area (MSA) values were obtained by measurements of N 2 O "single-pulse" titrations, assuming a Cu:N 2 O = 2 titration stoichiometry [35,36]. Before measurements, catalysts were reduced in situ at 573 K in H 2 flow (100 STP mL/min) for 1 h. After reduction, the samples were "washed" in He carrier flow at 583 K for 15 min, and then cooled to 363 K.…”

Thermal Behavior and Hydrogen Production of Methanol Autothermal Reforming Performed Using Oxygen Enrichment and Cu/ZnO/Al2O3/Cr2O3/CeO2 Catalyst

“…Methanol features a high hydrogen-carbon ratio and no C-C bonds, which minimizes the risk for coke formation. Moreover, methanol can be obtained from biomass [4,5]. Hydrogen can be produced from methanol by using various catalytic processes: steam reforming (SRM), partial oxidation (POM), and oxidative steam reforming (OSRM, Equation (1)); OSRM, which is also called autothermal reforming (ATR), is a combination of SRM and POM [6,7].…”