Development and Application of Nanoporous Adsorbent from Waste Wheat Husk
「Development and Application of Nanoporous Adsorbent from Waste Wheat Husk」於資料集「EPQSummary_ChemicalSubstanceManagement」由單位「行政院環境保護署」的陳先生所提供，聯繫電話是02-2311-7722#2386，最近更新時間為：2023-07-30 01:01:48。 欄位Project Title的內容是Development and Application of Nanoporous Adsorbent from Waste Wheat Husk ， 欄位Project Subject的內容是Four agriculture residues, including raw wheat husk, bio-treated wheat husk, rice husk, and pistachio shell, were used as starting materials to produce activated carbons with diverse physical and chemical properties. The adsorption behavior of volatile organic compounds (VOCs) for resulting adsorbents was tested with toluene as an adsorbate. Results showed that with adequate steam activation time, activated carbons with a surface area between 360 and 950 m2/g were developed. Further increases in the activation time destroyed the pore structure of activated carbons, which resulted in a decrease in the surface area and pore volume. Elemental analyses and X-ray photoelectron spectroscopy examination suggested that the oxygen content of activated carbons increased with increasing activation time. Furthermore, the amounts of oxygen-containing functional groups, including hydroxyl, carbonyl, and carboxyl groups also increased. These results indicate that H2O molecules react with the carbon surface to form those oxygen-containing acidic functional groups. Results from adsorption of toluene (inlet concentrations between 50 and 600 ppmv) at 40 to 80℃ showed that the adsorption capacities increased as the inlet toluene concentration increases, and decreased with increasing adsorption temperatures. Furthermore, these results were successfully fitted with Freundlich and Dubinin-Radushkevich (DR) isotherms (R2 > 0.96). The obtained Freundlich and DR constants can then be used to predict equilibrium adsorption capacities at various adsorption conditions and to calculate other important thermodynamic constants, such as heat of adsorption. ， 欄位Project Year的內容是2005 ， 欄位Organizer的內容是Office of Sustainable Development ， 欄位Executive Unit的內容是衛司特科技公司 ， 欄位Reporting download URL的內容是https://epq.epa.gov.tw/ProjectDoc/FileDownload?fid=4102&proj_id=A000000359350&doc_kind=1 ， 欄位Publish Date的內容是20060301 。
Project Title
Development and Application of Nanoporous Adsorbent from Waste Wheat Husk
Project Subject
Four agriculture residues, including raw wheat husk, bio-treated wheat husk, rice husk, and pistachio shell, were used as starting materials to produce activated carbons with diverse physical and chemical properties. The adsorption behavior of volatile organic compounds (VOCs) for resulting adsorbents was tested with toluene as an adsorbate. Results showed that with adequate steam activation time, activated carbons with a surface area between 360 and 950 m2/g were developed. Further increases in the activation time destroyed the pore structure of activated carbons, which resulted in a decrease in the surface area and pore volume. Elemental analyses and X-ray photoelectron spectroscopy examination suggested that the oxygen content of activated carbons increased with increasing activation time. Furthermore, the amounts of oxygen-containing functional groups, including hydroxyl, carbonyl, and carboxyl groups also increased. These results indicate that H2O molecules react with the carbon surface to form those oxygen-containing acidic functional groups. Results from adsorption of toluene (inlet concentrations between 50 and 600 ppmv) at 40 to 80℃ showed that the adsorption capacities increased as the inlet toluene concentration increases, and decreased with increasing adsorption temperatures. Furthermore, these results were successfully fitted with Freundlich and Dubinin-Radushkevich (DR) isotherms (R2 > 0.96). The obtained Freundlich and DR constants can then be used to predict equilibrium adsorption capacities at various adsorption conditions and to calculate other important thermodynamic constants, such as heat of adsorption.
Project Year
2005
Organizer
Office of Sustainable Development
Executive Unit
衛司特科技公司
Reporting download URL
https://epq.epa.gov.tw/ProjectDoc/FileDownload?fid=4102&proj_id=A000000359350&doc_kind=1
Publish Date
20060301
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