An overview of biogas upgrading via pressure swing adsorption: Navigating through bibliometric insights towards a conceptual framework and future research pathways

• Published in: Energy conversion and management Vol. 306; p. 118268
• Main Authors: Ali Abd, Ammar, Roslee Othman, Mohd, Helwani, Zuchra, Kim, Jinsoo
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 15-04-2024
• Subjects: Bibliometric analysis; Biogas upgrading; Biomethane; CH4/CO2 separation; Pressure swing adsorption; Biogas upgrading; Biomethane; Bibliometric analysis; CH4/CO2 separation; Pressure swing adsorption
• ISSN: 0196-8904; 1879-2227
• DOI: 10.1016/j.enconman.2024.118268

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•127 articles were analyzed to unveil trends, key journals, and influential entities in biogas upgrading via PSA.•Citation mapping and content analysis were integrated to reveal four critical research streams.•Proposed a logical framework, elucidating common adsorbents and most influential parameters on PSA performance.•Insights from most cited articles were merged to present five strategic suggestions for future research.•Beyond retrospective, our review guides future research in biogas upgrading via PSA.
Biogas upgrading is an attractive solution to mitigate greenhouse gas emissions, presenting an alternative renewable source of energy to meet the SDG 13 and SDG 7 of the UN charters. Pressure swing adsorption (PSA) distinguishes itself from water scrubbing, amine absorption, and cryogenic separation methods in CO2 separation from biogas mixtures by offering lower energy consumption, enhanced purity, and immunity to corrosion issues. This review provides a comprehensive analysis of the current development status, research trends, and emerging frontiers of PSA in biogas upgrading. Leveraging the bibliometric analysis capabilities of VOSViewer software, a total of 127 articles related to CO2 separation from CH4 streams using PSA technology were scrutinized for specific characteristics, including publication year, authors, institutions, countries, references, and keywords. Co-citation analysis, complemented by content analysis of highly cited articles, identifies four primary research streams: i) modifications to existing PSA system designs, ii) development of novel adsorbents, iii) exploration of composite materials and diverse bed configurations, and iv) simulation studies for comprehensive mass and energy analyses. This study unveils current trends, global collaboration patterns, foundational knowledge, research hotspots, and emerging frontiers in the field of CO2 separation from CH4 streams using PSA technology.