Catalytic Hydrogenation of Nitrate Ions over Pd-Cu/ZSM-5 Catalyst

Abstract

Palladium-copper bimetallic catalysts supported over different supporters were prepared by chemical reduction method, and their catalytic performance was investigated with the hydrogenation of nitrate ions in drinking water under mild conditions. The results show that Pd-Cu/ZSM-5 bimetallic catalyst has the highest catalytic activity among all used catalysts. In addition, nitrate conversion influenced by metal content, metal molar ratio (Pd:Cu) and the addition of CO2 are also discussed. It is well established that the addition of CO2 has changed the reduction path of the intermediate nitrite, but is no influence on the steps of nitrate-to-nitrite reduction. In the end, the mechanism of catalytic nitrate reduction was discussed on the basis the literature results.

Applications of bimetallic PdCu catalysts

“…Concerning zeolites, in 2011 Gao and Li 97 prepared PdCu BNPs supported on ZSM-5, this PdCu@ZSM-5 catalyst was prepared using a chemical reduction method and applied in the hydrogenation of nitrate ions in drinking water under mild reaction conditions. The catalytic activity of this catalyst was compared with β and γ-Al 2 O 3 supported PdCu BNPs in this reaction.…”

Aromatic hydrogenation of benzyl alcohol and its derivatives using compressed CO2/water as the solvent

“…8c In other research by Gao and Li, the addition of CO 2 was influential to the hydrogenation of nitrate ions in drinking water. 9 Thus, to discover more extended examples of using green solvents for aromatic hydrogenation is the primary goal in this study. Therefore, the superiority of several green solvents, including water, CXL and compressed CO 2 /water was investigated for the hydrogenation of benzyl alcohol and its derivatives.…”