Biogas upgrading using aqueous bamboo-derived activated carbons

CO<sub>2</sub>/CH<sub>4</sub> separation is crucial for biogas upgrading. In this study, the bamboo-derived activated carbons (BACs) were prepared with different ratios of potassium hydroxide (KOH)/bamboo charcoal (BC), and the hybrid sorbents of aqueous BACs were developed for CO<sub>2</sub>/CH<sub>4</sub> separation. Both the gas solubility and sorption rate were measured, and Henry's constant and liquid-side mass-transfer coefficient as well as the CO<sub>2</sub>/CH<sub>4</sub> selectivity were calculated. Meanwhile, the comprehensive performances of aqueous BACs were evaluated using a novel index, and the cost of biogas upgrading using the aqueous BACs was estimated and compared to the commercialized technology. The results proved the effectiveness of aqueous BACs, and the comprehensive performance of 7.0 wt% aqueous BAC with the KOH/BC mass ratio of 2:1 was 4.2 times than that of H<sub>2</sub>O, having the potential to decrease the average CO<sub>2</sub>/CH<sub>4</sub> separation cost by 65.0% compared to the commercialized technology.

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Publication Details

Journal
Bioresource Technology
Published
2025-01-09
DOI
https://doi.org/10.1016/j.biortech.2025.132055
Citations
8
Primary Topic
Membrane Separation and Gas Transport
Type
article
Field-Weighted Citation Impact
5.71

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article

Biogas upgrading using aqueous bamboo-derived activated carbons

Haoran Yin, Shengchun Hu, Kang Sun, Shitao Wen et al.
8 citations
Bioresource Technology
Membrane Separation and Gas Transport
5.71
article

Biogas upgrading using aqueous bamboo-derived activated carbons

Haoran Yin, Shengchun Hu, Kang Sun, Shitao Wen, Xiaoyan Ji, Yifeng Chen, Jianchun Jiang, Weiyue Zhang
article en
8 citations

Abstract

CO<sub>2</sub>/CH<sub>4</sub> separation is crucial for biogas upgrading. In this study, the bamboo-derived activated carbons (BACs) were prepared with different ratios of potassium hydroxide (KOH)/bamboo charcoal (BC), and the hybrid sorbents of aqueous BACs were developed for CO<sub>2</sub>/CH<sub>4</sub> separation. Both the gas solubility and sorption rate were measured, and Henry's constant and liquid-side mass-transfer coefficient as well as the CO<sub>2</sub>/CH<sub>4</sub> selectivity were calculated. Meanwhile, the comprehensive performances of aqueous BACs were evaluated using a novel index, and the cost of biogas upgrading using the aqueous BACs was estimated and compared to the commercialized technology. The results proved the effectiveness of aqueous BACs, and the comprehensive performance of 7.0 wt% aqueous BAC with the KOH/BC mass ratio of 2:1 was 4.2 times than that of H<sub>2</sub>O, having the potential to decrease the average CO<sub>2</sub>/CH<sub>4</sub> separation cost by 65.0% compared to the commercialized technology.

Bioresource TechnologyVol. 419
Nanjing Forestry University (CN), Luleå University of Technology (SE), Huzhou Normal University (CN), Institute of Chemical Industry of Forest Products (CN)
Kempe Foundation, National Natural Science Foundation of China, Government of Jiangsu Province, Energimyndigheten, Natural Science Foundation of Jiangsu Province, Major Science and Technology Projects in Yunnan Province
Openalex Percentile: Top 4%
Membrane Separation and Gas Transport
5.71
DOIOpen Access PDFOpenAlex
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