How does structured adsorbent channel heterogeneity influence the efficiency of adsorptive CO2 capture?

This research-oriented project provides simulation and modeling guidance to evaluate the impact of channel heterogeneity in structured adsorbent monoliths during carbon dioxide capture. While structured monoliths offer significant advantages over conventional fixed beds—such as enhanced productivity and reduced energy consumption—manufacturing defects often introduce non-uniform wall size distributions. This study systematically compares the performance of a traditional fixed bed, an ideal structured monolith, and monoliths characterized by varying degrees of channel wall size heterogeneity within a vacuum swing adsorption (VSA) framework. Utilizing a rigorous mathematical modeling approach, the project analyzes how these structural defects degrade process efficiency. The evaluation demonstrates that wider distributions of channel wall sizes lead to a notable

decline in CO2 recovery, a reduction in throughput, and a substantial increase in specific energy consumption. By structuring this comparative analysis, the project supports the development of robust design guidelines and tolerance limits for manufacturing structured adsorbents, ultimately bridging the gap between theoretical monolith performance and practical, defect-tolerant carbon capture systems.

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