Trung B.C., An N.T., Long N.Q., 2020, Carbon Grain Supported Nano-Sized Au for Low Temperature Removal of VOCs in Humid Condition: Effect of Catalyst’s Synthesis Conditions, Chemical Engineering Transactions, 78, 79-84.
This study reports effects of pH and PVA/Au mass ratio on properties and catalytic activity of carbon grain supported nano Au catalysts for treatment of VOC pollutants at low temperatures. The catalysts were synthesized at various pH of the sol solution and different PVA/Au mass ratios. They were characterized by specified techniques to evaluate crystallinity, surface properties, and morphology. The catalytic activity for VOCs removal has been conducted in the temperature range 100-200 C and in the presence of water vapor. The relationship between catalyst’s characterization and the low-temperature catalytic activity was evaluated, and the synergy effect in the dual functional adsorbent/catalyst was reported. Nano Au supported on granular carbon, which was synthesized with mass ratio PVA/Au = 4 at pH = 4, can removal toluene about 50.3 % from initial concentration of 314 ppmv after 60 min reaction at the reaction temperature 150 C and high humidity (RH = 60 %). Furthermore, moisture reduces the activity only slightly due to the hydrophobicity of activated carbon, and the durability of the catalyst was also reported.
