Study on VOCs/NH3 synergistic treatment process based on adsorption/ in-situ catalytic oxidation

The mechanism of synergistic treatment of VOCs and NH3 is poorly understood, it urgently needed to study the co-adsorption/in-situ catalytic oxidation mechanism. In this study, we proposed an integrated VOCs/ NH3 treatment (i-VNT) process for the adsorption/in-situ catalytic of C8H10/NH3 using metal doped Al2O3. The results showed that the adsorption capacity on different adsorbents in co-adsorption process appeared different degrees of reduction, especially the maximum reduction for C8H10 is of 22.04 mg/g, respectively. The "inhibition zone" existed in the synergistic catalytic process in 200-300 degrees C as the competition for reactive oxygen species, while in 300 degrees C, the C8H10 avoided the excessive oxidation of NH3. Finally, the adsorption intermediates, changes of surface functional groups and reaction mechanism were clarified using in situ FTIR in real time. This current research offered efficient and stable catalysts for the co-adsorption/in-situ catalytic oxidation destruction, and provided a promising strategy for the next step in the synergistic treatment of multiple pollutants in open application scenarios.