Greener and facile synthesis of Cu/ZnO catalysts for CO₂ hydrogenation to methanol by urea hydrolysis of acetates.

ABSTRACT: Cu/ZnO-based catalysts for methanol synthesis by CO _x hydrogenation are widely prepared via co-precipitation of sodium carbonates and nitrate salts, which eventually produces a large amount of wastewater from the washing step to remove sodium (Na⁺) and/or nitrate (NO₃ ^-) residues. The step is inevitable since the remaining Na⁺ acts as a catalyst poison whereas leftover NO₃ ^- induces metal agglomeration during the calcination. In this study, sodium- and nitrate-free hydroxy-carbonate precursors were prepared via urea hydrolysis co-precipitation of acetate salt and compared with the case using nitrate salts. The Cu/ZnO catalysts derived from calcination of the washed and unwashed precursors show

SUBMITTER: Phongprueksathat N 

PROVIDER: S-EPMC8697775 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature