Influence of active phase composition (Mn, Ni, Mn x Ni 10−x ) on catalytic properties and performance of clinoptilolite supported nanocatalysts synthesized using ultrasound energy toward abatement of toluene from polluted air

Abstract

Abstract Toluene removal out of waste gas streams was fulfilled through catalytic oxidation over series of MnxNi10−x/clinoptilolite nanocatalysts with different Mn/Ni ratios. The samples were synthesized using sonochemical method and examined in total oxidation of toluene. The nanocatalysts were characterized by XRD, FESEM, EDX, FTIR and BET techniques. XRD data was confirmed the formation of Mn2O3 and NiO as the crystalline phases for single and mixed oxides nanocatalysts. Furthermore, EDX analysis manifested homogenous dispersion of elements on ultrasound irradiated nanocatalysts. Basically, reaction data illustrated that all bimetallic nanocatalysts had lower temperature activity compared to monometallic nanocatalysts. Results indicated that there are significant synergetic effects of bimetallic on reduction of oxidation temperature. Mn7%Ni3%/clinoptilolite nanocatalyst had the best performance among synthesized samples. Toluene removal efficiency on this nanocatalyst was completed at 225 °C. Stability test of nanocatalyst demonstrated that the removal efficiency has remained constant for 1440 min.