Production of hydrogen by partial oxidation of methanol over Cu/ZnO catalysts prepared by microemulsion technique

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

“…The O 2 pressure was maintained substoichiometric (O 2 / CH 3 OH = 0.2), as it has been shown that the loss of methanol and/or H 2 by combustion during POM is substantial under stoichiometric conditions (O 2 /CH 3 OH = 0.5) [22,24]:…”

“…Recent papers have discussed the POM reaction [22][23][24], as well as the combined process for production of H 2 [25][26][27][28][29][30][31][32][33][34][35][36][37][38]. The Cu/ZnO/Al 2 O 3 catalyst, which is traditionally used for low-temperature gas-shift and methanol synthesis, has been widely used in these reactions.…”

Production of hydrogen from methanol over binary Cu/ZnO catalysts

“…Different precipitating agents have been employed for the common precipitation route, e.g. sodium carbonate [12][13][14][15][16][17][18][19], sodium aluminate [20] and oxalic acid [21][22][23][24][25]27]. Furthermore, the influence of preparation parameters, such as addition rate of the precipitating agent, temperature, pH [12,16,17] and the effect of calcination and reduction conditions [18,24] have been thoroughly investigated.…”

“…In a recent paper, we explored the use of water-in-oil microemulsions for preparation of binary Cu/ZnO catalysts [27]. A microemulsion is an optically isotropic solution of water, a hydrocarbon and a surfactant.…”

“…In our previous work [27], Cu and Zn nitrate precursors were precipitated by oxalic acid in the water domain of microemulsions. Using this technique, a Cu/ZnO material highly suitable for production of hydrogen by partial oxidation of methanol was obtained.…”