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Shuangde Li,Tao Wang,Mu Zhou,Shaohua Chai,Linfeng Nie,Zhenjiang Wu,Ning Han,Yunfa Chen 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.114 No.-
A dual-functional adsorption–catalytic system for elimination of trace toluene is developed and realizedover molecular sieve-hosted varied ratio of platinum and palladium catalysts. PtPd/molecular sieveexhibites PdO and PtO2 around 2–3 nm particles with uniform loading verified by XRD, TEM, Ramanand XPS. The adsorption–desorption–catalysis for trace toluene purification is evaluated on the quartzmicro-reactor and the self-made electrically heated equipment. 3Pt1Pd/molecular sieve shows tolueneadsorption capacity of 18.22 mg/g and desorption efficiency about 77%, together with the maximum desorptiontemperature at 100 C. 3Pt1Pd/molecular sieve owns toluene conversion with 38.3% and 100% at100 and 200 C, accompanied with the higher CO2 selectivity of 0.0% and 150.0%, separately, due to thehigher Pd2+ content. The catalyst displays water vapor endurance, reproducibility, and 83.0% carbon balanceduring the whole adsorption–desorption–catalysis within 150 min, which highlights the sustainableapplicability in lean VOCs abatement. Furthermore, the possible catalytic reaction pathway of tolueneoxidation is proposed based on the in-situ DRIFTS experiments.