Approximate Adsorption Performance Indicator in Evaluating Sustainable Bamboo-Derived Adsorbents for Biogas Upgrading

Khaled Abou Alfa (), Nour Abou Saleh, Adrian Beda, Camélia Matei Ghimbeu, Grace Iragena Dushime, Frederic Marias, Laurent Moynault, Vincent Platel and Cecile Hort ()
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Khaled Abou Alfa: Laboratoire de Thermique, Energetique et Procedes-IPRA, EA1932, Université Pau, Pays Adour/E2S UPPA, 64000 Pau, France
Nour Abou Saleh: Laboratoire de Thermique, Energetique et Procedes-IPRA, EA1932, Université Pau, Pays Adour/E2S UPPA, 64000 Pau, France
Adrian Beda: Institut de Science des Matériaux de Mulhouse (IS2M), CNRS UMR 7361, Université de Haute-Alsace, 68100 Mulhouse, France
Camélia Matei Ghimbeu: Institut de Science des Matériaux de Mulhouse (IS2M), CNRS UMR 7361, Université de Haute-Alsace, 68100 Mulhouse, France
Grace Iragena Dushime: Laboratoire de Thermique, Energetique et Procedes-IPRA, EA1932, Université Pau, Pays Adour/E2S UPPA, 64000 Pau, France
Frederic Marias: Laboratoire de Thermique, Energetique et Procedes-IPRA, EA1932, Université Pau, Pays Adour/E2S UPPA, 64000 Pau, France
Laurent Moynault: Laboratoire de Thermique, Energetique et Procedes-IPRA, EA1932, Université Pau, Pays Adour/E2S UPPA, 64000 Pau, France
Vincent Platel: Laboratoire de Thermique, Energetique et Procedes-IPRA, EA1932, Université Pau, Pays Adour/E2S UPPA, 64000 Pau, France
Cecile Hort: Laboratoire de Thermique, Energetique et Procedes-IPRA, EA1932, Université Pau, Pays Adour/E2S UPPA, 64000 Pau, France

Sustainability, 2025, vol. 17, issue 4, 1-23

Abstract: Purifying biogas by removing contaminants and carbon dioxide (CO 2 ) to produce biomethane enhances its energy content, making it suitable as fuel and for injection into natural gas grids. Bamboo-derived adsorbents Bamboo-500 (pyrolyzed at 500 °C), Bamboo-700 (pyrolyzed at 700 °C), and Bamboo-A-900 (activated with CO 2 at 900 °C) were synthesized and characterized to evaluate their performance for CO 2 and CH 4 adsorption. Increasing pyrolysis temperature from 500 °C to 700 °C and further CO 2 activation at 900 °C enhanced adsorption capacities of CO 2 and CH 4 due to improved surface area and micropore structure. In this study, the novel Approximate Adsorption Performance Indicator (AAPI) approach is introduced, offering an efficient method for evaluating adsorbent performance, particularly in biogas upgrading. AAPI results suggest Bamboo-500 is suitable for biogas upgrading at very low pressures (<0.12 MPa) with low regeneration energy and acceptable CO 2 capacity (1.9 ± 0.2 mol kg −1 ). However, Bamboo-A-900 excelled at medium and high pressures by its highest CO 2 adsorption capacity (8.0 ± 0.3 mol kg −1 ) promoted by the high surface area (1220 m 2 g −1 ) and calcium oxide presence. Finally, Bamboo-A-900 shows promise for enhancing CO 2 adsorption and biogas upgrading. Bamboo-derived adsorbents offer a sustainable solution for biogas upgrading, supporting Sustainable Development Goals by promoting clean energy transitions.

Keywords: bamboo; biogas; physical adsorption; activated biochar; pyrolysis; Approximate Adsorption Performance Indicator (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2025
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