Enhanced capture of waste and diluted CO2 by N/O-rich multilayered ultramicropores bio-carbon composites materials

• Published in: Composites communications Vol. 28; p. 100961
• Main Authors: Hui, Wei, Mao, Fei-Feng, Wang, Xiang, Xu, Xin-Yi, Wang, Hai-Jun
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.12.2021
• Subjects: Carbon-based composite materials; Diluted CO2 capture; N/O-rich; Potassium acetate; Carbon-based composite materials; Diluted CO2 capture; N/O-rich; Potassium acetate
• ISSN: 2452-2139; 2452-2139
• DOI: 10.1016/j.coco.2021.100961

The effective capture of waste and diluted CO2 by porous carbon materials is extremely challenging. Herein, a facile one-step strategy was developed to prepare activated N/O-rich multilayer ultramicropores carbon composite materials for capturing waste and diluted CO2 effectively by directly carbonizing urea and d-glucose with a novel non-corrosive and non-toxic chemical activator of potassium acetate. Especially, the diluted CO2 adsorptive capacity of the porous carbon material reached 1.38 mmol/g and 0.57 mmol/g at 0.15 bar and 0.05 bar (0 °C) respectively. Meanwhile, the retention time up to 85 min in the diluted CO2 breakthrough experiment further confirms the outstanding adsorptive property of the materials, implying their potential for CO2/N2 separation in the industrial field. [Display omitted] •Preparation of N/O-rich multilayered ultramicropores bio-carbon by the one-step method.•The synergistic effect of double heteroatoms enhances the efficacy of diluted CO2 capture capacity.•PGNC-0.5 has the highest capacity for extremely diluted CO2 uptake.•PGNC-0.5 adsorbent obtained an effective retention time of up to 85 min in the breakthrough experiment of extremely diluted CO2.