Facile synthesis of porous carbons from silica-rich rice husk char for volatile organic compounds (VOCs) sorption
| Autor: | Yafei Shen, Niyu Zhang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
Environmental Engineering Bioengineering 010501 environmental sciences 01 natural sciences chemistry.chemical_compound Adsorption 010608 biotechnology Specific surface area Biochar Phenol Char Waste Management and Disposal 0105 earth and related environmental sciences Volatile Organic Compounds Renewable Energy Sustainability and the Environment Chemistry Tar Sorption Oryza General Medicine Silicon Dioxide Toluene Carbon Chemical engineering Charcoal Porosity |
| Zdroj: | Bioresource technology. 282 |
| ISSN: | 1873-2976 |
| Popis: | This work reported a facile synthesis of porous carbons from the silica-rich rice husk biochar via a ball-milling-assisted KOH activation for sorption of tar compounds and volatile organic compounds (VOCs) (i.e., toluene, phenol). The textural properties of activated biochars can be greatly influenced by the mass ratio of KOH and biochar. The high-performance biochar with a large specific surface area (SBET: 1818 m2/g) was produced as the mass ratio was 3. This activated biochar exhibited a hierarchically meso-microporous structure, which benefited for the adsorption process. Particularly, it had long breakthrough time of 2784 min and high adsorption capacity of 264 mg/g for toluene, while it had short breakthrough time of 724 min and low adsorption capacity of 6.53 mg/g for phenol. Significantly, the mixed VOCs of toluene and phenol can be effectively adsorbed. Further, thermal desorption will be an alternative route for regeneration of waste activated biochar. |
| Databáze: | OpenAIRE |
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