| Title: | New insights into hierarchical pore size and level of concentration in efficient removal of toluene vapor by activated carbon |
| Author(s): | Liu X; Zhu H; Gong L; Jiang L; Lin D; Yang K; |
| Address: | "Department of Environmental Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou 310058, China. Department of Environmental Science, Zhejiang University, Hangzhou 310058, China; Zhejiang Provincial Key Laboratory of Organic Pollution Process and Control, Hangzhou 310058, China; Zhejiang University-Hangzhou Global Scientific and Technological Innovation Center, Hangzhou 311200, China. Electronic address: kyang@zju.edu.cn" |
| DOI: | 10.1016/j.scitotenv.2022.158719 |
| ISSN/ISBN: | 1879-1026 (Electronic) 0048-9697 (Linking) |
| Abstract: | "The hierarchical pore structure of nanoporous carbon and gaseous toluene concentration co-mediated adsorption mechanism was examined. The KOH-activated carbons with tailorable high surface area (1126-3148 m(2)/g), large pore volume (0.446-2.08 cm(3)/g) and broadening average pore width (0.873-2.68 nm) were prepared. Dynamic adsorption was used to determine breakthrough curves and adsorption isotherms of toluene by as-prepared KOH-activated carbons and commercial activated carbons. The experimental results showed that the breakthrough time is positively correlated with ultramicropore volume of all activated carbons. The equilibrium amounts adsorbed (q(e)) for toluene at 100 ppmv were as high as 454 mg/g on KOH-activated carbons. The q(e) for toluene at P/P(0) < 0.017 dominated by ultramicropore volume of all activated carbons were attributed to the enhanced superposition of adsorption force field between adjacent ultramicropore walls. A large adsorption affinity is imperative to achieve high amounts adsorbed for toluene at low concentration. The toluene was firstly filled in ultramicropores then gradually occupied in wide micropores at 0.017 0.1 were linearly correlated with volume of micropore and small mesopore. The governing porosity in adsorbing toluene is varied with the intruding concentration. These results provided new insights into adsorption mechanism and development of novel materials" |
| Keywords: | *Charcoal/chemistry *Toluene Adsorption Porosity Gases Affinity Dynamic adsorption KOH activation Mechanism Volatile organic compounds; |
| Notes: | "MedlineLiu, Xianyu Zhu, Hongxia Gong, Li Jiang, Ling Lin, Daohui Yang, Kun eng Netherlands 2022/09/16 Sci Total Environ. 2022 Dec 20; 853:158719. doi: 10.1016/j.scitotenv.2022.158719. Epub 2022 Sep 12" |
