Towards circular carbon economy: recent developments and techno-economic assessment of integrated carbon dioxide capture and utilization

The article reviews the latest advances in integrated CO₂ capture and utilization (ICCU), which presents several benefits over conventional carbon capture and utilization. A variety of ICCU processes based on homogeneous adsorption and catalytic systems, as well as heterogeneous materials are reviewed critically in the article. Due to the varying configurations of adsorption and catalytic processes in the ICCU process, heterogeneous materials can be utilized in various forms, including the superposition of adsorbent and catalyst, physical mixing and the use of dual-functional materials. The development of various bifunctional materials that are eco-friendly, simple to regenerate, and consume less energy for integrated CO₂ capture and reverse water–gas shift reaction (ICCU-RWGS), integrated CO₂ capture and dry reforming of methane (ICCU-DRM), and integrated CO₂ capture and methanation (ICCU-Methanation) has also been investigated. A detailed discussion has also been conducted on the selection of components and the effect of operating parameters to synthesize bifunctional materials. Additionally, in order to consider large scale industrial applications this review also included techno-economic and environmental assessments of ICCU. The review concluded that Compared to carbon capture and storage and carbon capture and utilization, ICCU offers advantages in terms of technology, economy, and the environment.