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 CO 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 CO separation from CH 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 CO separation from CH streams using PSA technology.

中文翻译：

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通过变压吸附升级沼气的概述：通过文献计量学见解导航到概念框架和未来研究路径

沼气升级是减少温室气体排放的一种有吸引力的解决方案，提供了一种替代性可再生能源，以满足联合国宪章的可持续发展目标 13 和可持续发展目标 7。变压吸附 (PSA) 与从沼气混合物中分离 CO 的水洗涤、胺吸收和低温分离方法不同，它具有更低的能耗、更高的纯度和抗腐蚀问题。本文对沼气提质变压吸附技术的发展现状、研究趋势和新兴前沿进行了全面分析。利用 VOSViewer 软件的文献计量分析功能，共检查了 127 篇与使用 PSA 技术从 CH 流中分离 CO 相关的文章的具体特征，包括出版年份、作者、机构、国家、参考文献和关键词。同被引分析，辅以高被引文章的内容分析，确定了四个主要研究方向：i) 对现有 PSA 系统设计的修改，ii) 新型吸附剂的开发，iii) 复合材料和不同床配置的探索，以及 iv)综合质量和能量分析的模拟研究。这项研究揭示了使用 PSA 技术从 CH 流中分离 CO 领域的当前趋势、全球合作模式、基础知识、研究热点和新兴前沿。