Phyo, Sooyeol Kim, Sooyeon Lee, Heehyeon Han, Sang Soo Oh, Youngtak Lee, Jiwon 2024-01-19T10:00:57Z 2024-01-19T10:00:57Z 2023-06-15 2023-03 0959-6526 https://pubs.kist.re.kr/handle/201004/113900 Nitrogen-containing odorous compounds (NOCs) such as ammonia, ethylamine, dimethylamine, and trimethylamine (TMA) have potentially adverse effects on the environment and human health. An efficient and simple strategy for NOC removal is necessary. Herein, thermally dried activated carbon adsorbents (TDACs) were prepared, and their surfaces were subjected to controlled thermal oxidation at 50, 100, and 200 degrees C. The resulting TDACs exhibited micropore-intensive porous structures with different specific surface areas (SSA) (135-562 m2 g-1) and demonstrated 2-38 times higher NOC-adsorption capacity (12.35-102.92 mg g-1) than that of pristine AC in a fixed-bed breakthrough test. Comprehensive surface characterization revealed a correlation between the thermal oxidation conditions and corresponding SSAs. Density functional theory calculations revealed that multidentate hydrogen bonding potential prevails over proton affinity in determining the NOC-adsorption trend. The fractal-like kinetics of the classical adsorption fitting for the TDACs suggested a heterogeneous adsorption behavior (R2 = 0.9998). A competitive adsorption test for the TDACs using a binary mixture of TMA and benzene demonstrated that TMA is favorably adsorbed over benzene and that the co-adsorption process involves a roll-up effect. This study demonstrates that NOC adsorption on TDACs can be controlled via a thermal oxidation strategy, which affords adsorbents with high reusability and adsorbate selectivity. English Elsevier BV Adsorption enhancement of hazardous odor gas using controlled thermal oxidation of activated carbon Article 10.1016/j.jclepro.2023.136261 1 Journal of Cleaner Production, v.393 Journal of Cleaner Production 393 Y scie scopus 000990488300001 2-s2.0-85147857775 Green & Sustainable Science & Technology Engineering, Environmental Environmental Sciences Science & Technology - Other Topics Engineering Environmental Sciences & Ecology Article FIXED-BED AMMONIA AIR TRIMETHYLAMINE CHROMATOGRAPHY PERFORMANCES COMPOSITES OPERATIONS REDUCTION EMISSIONS Nitrogen -containing odorous compounds Activated carbon Gas adsorption Density functional theory Fixed -bed breakthrough