Environment-friendly magnetic Fe-Ce-W catalyst for the selective catalytic reduction of NO _x with NH₃: influence of citric acid content on its activity-structure relationship.

ABSTRACT: The influence of the citric acid content on the structural and redox properties of a magnetic iron-cerium-tungsten mixed oxide catalyst prepared through a microwave-assisted citric acid sol-gel method is investigated via TG-DTG-DSC, XRD, N₂ adsorption-desorption, XPS, H₂-TPR and NH₃-TPD. Additionally, the NH₃-SCR activity of the magnetic FeCeW-m (m = 0.25, 0.5 and 1.0) catalysts are also studied. The results indicate that an increase in citric acid content strengthens the sol-gel reaction between citric acid and metal ions and promotes the formation of the γ-Fe₂O₃ crystallite not α-Fe₂O₃. Meanwhile, it decreases the BET surface area and pore volume of the catalyst. Furthermore, the

SUBMITTER: Xiong ZB 

PROVIDER: S-EPMC9081273 | biostudies-literature | 2018 Jun

REPOSITORIES: biostudies-literature