Rapid preparation strategy of highly microporous activated carbons for gas adsorption, via tunable-energy-density microwave heating
Junfeng Li,
Wei Zhou,
Yuming Huang,
Yang Zhao,
Xuhan Li,
Naiyuan Xue,
Zhibin Qu,
Zhipei Tang,
Liang Xie,
Jingyu Li,
Zheyu Liu,
Yitian Fang,
Xinxin Pi,
Xiaoxiao Meng,
Haiqian Zhao,
Jihui Gao,
Fei Sun,
Guangbo Zhao and
Yukun Qin
Renewable Energy, 2024, vol. 225, issue C
Abstract:
Microwave heating for the production of activated carbons has garnered significant research interest in the realms of gas adsorption. Nonetheless, the effect of tunable-energy-density microwave irradiation on the production of activated carbons is unclear. Herein, we report a tunable-energy-density microwave heating strategy to rapidly prepare highly microporous activated carbons. With the raising microwave energy density, the pore volume increases from 0.68 cm3 g−1 to 0.89 cm3 g−1, with a 70% decrease in the preparation time. Moreover, due to the high ratio of micropore (84.4%–86.6%) and great hydrophobicity, the optimal toluene adsorption capacity reaches 0.56 g g−1 and 0.47 g g−1 in the dry and wet (97% RH) environment, respectively. Due to the high ratio of ultramicropore (62.6%–69.0%), at 1 bar, the optimal CO2 uptake for 25 °C and 0 °C reaches 4.27 mmol g−1 and 6.41 mmol g−1, respectively. This study introduces a straightforward and effective method for the swift production of activated carbons, applicable across a spectrum of uses.
Keywords: Microwave heating; Activated carbons; Microwave energy density; CO2 capture; Toluene adsorption (search for similar items in EconPapers)
Date: 2024
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:225:y:2024:i:c:s0960148124003252
DOI: 10.1016/j.renene.2024.120260
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