Influence of Zr on the performance of Cu/Zn/Al/Zr catalysts via hydrotalcite-like precursors for CO2 hydrogenation to methanol

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

“…The results of catalytic tests in the CO2 hydrogenation in the range of 453-513 K and at 0.1, 3.0 and 5.0 MPa are summarized in Table 2 in terms of H2 conversion ( As extensively reported in literature, CO2 hydrogenation drives to methanol and CO over Cubased catalyst through the reactions of methanol synthesis (Equations (1) and (2)) and Reverse Water Gas Shift (Equation (3)), while the methane formation (Equation (4)) is strongly un-favored under such reaction conditions [27,37]:…”

“…As extensively reported in literature, CO 2 hydrogenation drives to methanol and CO over Cu-based catalyst through the reactions of methanol synthesis (Equations (1) and (2)) and Reverse Water Gas Shift (Equation (3)), while the methane formation (Equation (4)) is strongly un-favored under such reaction conditions [27,37] In respect of this, a progressive increase of H 2 conversion, associated with a significant decrease in methanol selectivity, has been observed with the increase in temperature, independent of chemical composition and pressure. According to the greater partial pressure of reactants on the catalyst surface, the H 2 conversion increases further over all samples by upping the pressure from 0.1 MPa to 5.0 MPa.…”

“…CO2 hydrogenation to methanol by using Cu-based catalytic systems promoted by several oxides/carriers has been widely investigated in literature [3,5,[16][17][18][19][20][21][22][23][24][27][28][29][30][31][32], although very few examples of multicomponent CuO-ZnO-CeO2 and CuO-ZnO-CeO2-ZrO2 systems are still present [25,26,33,34,41,42].…”

“…On this address, in the past decades, significant effort has been devoted to improve the properties of Cu-based catalysts by the use of promoters and carriers/supports [19][20][21][22][23]. Several metal oxides are reported in literature for improving the catalytic performance of copper-based catalysts, in term of activity, selectivity, and stability [24][25][26][27][28][29], also enhancing CO 2 adsorption with respect to un-promoted systems. In particular, in our previous works [30][31][32][33][34], we disclose the positive effects of ZrO 2 on the catalytic performance of Cu-ZnO catalyst with respect to that of Al 2 O 3 -supported, as a result of the lower hydrophilic nature of ZrO 2 than Al 2 O 3 , which facilitates water desorption, and its property of stabilizing Cu + -O species, which favor CO 2 adsorption/activation and methanol selectivity.…”

Copper-based Perovskite Design and Its Performance in CO2 Hydrogenation to Methanol

“…The exposed Cu surface area and the Cu dispersion measured by N 2 O adsorption technique are also low, which even cannot be measured for both P and Ce-P. Y-P possesses the largest Cu surface area and the Cu dispersion by comparison. The lower copper surface area may not be favorable for the conversion of CO 2 to methanol [19]. The ICP results show that the experimental lanthanum amount is lower than the theoretical value, and other element amounts are similar to the nominal values.…”