Micro-mesoporous carbons from original and pelletized rice husk via one-step catalytic pyrolysis
| Autor: | Mindong Chen, Yafei Shen, Xinlei Ge, Niyu Zhang, Yuhong Fu |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Environmental Engineering
Materials science Renewable Energy Sustainability and the Environment Carbonization 020209 energy Oryza Bioengineering 02 engineering and technology General Medicine Silicon Dioxide 021001 nanoscience & nanotechnology Husk Carbon Catalysis Adsorption Chemical engineering Biochar 0202 electrical engineering electronic engineering information engineering 0210 nano-technology Mesoporous material Waste Management and Disposal Pyrolysis Syngas |
| Zdroj: | Bioresource Technology. 269:67-73 |
| ISSN: | 0960-8524 |
| DOI: | 10.1016/j.biortech.2018.08.083 |
| Popis: | This paper studied the KOH-catalyzed pyrolysis of rice husk (RH) and its pellet (RHP) at a high temperature (750 °C) for activated bio-carbons production. The mass ratio of KOH and biomass greatly impacted the pyrolysis kinetic and biochar property. The KOH catalysis (mass ratio: 1) reduced significantly the activation energy to 41 kJ/mol. During carbonization with KOH, the in-situ generated K2CO3 tailored the morphology and size of the self-template (SiO2 nanoparticles), giving rise to the chars with the open foam-like porous architectures enrich in micro- and meso-pores. Thus, the KOH activation via one-step pyrolysis could produce the micro-mesoporous carbons (e.g., RH-char 1 and RHP-char 1) with high specific surface areas and high content of oxygen-functionalities. Furthermore, the hierarchical porous carbons have high potential applications in adsorption process and electrochemical energy storage (e.g., supercapacitor) because of their unique physicochemical properties. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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