Activity

The research group of Prof. H. Tanaka (Shinshu University, RISM), Dr. S. Hiraide, Y. Sakanaka, Prof. M. T. Miyahara (Kyoto University), Dr. H. Kajiro (Nippon Steel Co.), Dr. S. Kawaguchi (JASRI) proposed a high-efficiency CO2 separation system using gate-type adsorbents.

CO2 is a greenhouse gas that causes global warming, and the Paris Agreement (2015) set the goal of an average temperature rise of 2 ˚C or less to be achieved by reducing CO2 emissions. To achieve this goal, it is essential to separate and capture CO2 at emission sources with high efficiency and low cost, in addition to improving energy efficiency and utilizing renewable energy.
Therefore, the research group has focused on a gate-type adsorbent that captures CO2 by deforming its structure and has elucidated its excellent CO2 separation performance. In addition, they proposed a high-throughput adsorption-based separation system that takes advantage of the characteristics of the gate-type adsorbent, which can suppress the heat generated upon CO2 adsorption via its endothermic structural deformation, and found that the CO2 separation efficiency is much higher than that obtained using conventional methods.

This study was the first to clarify that the gate-type adsorbent is useful for enhancing the efficiency and energy economy of the CO2 adsorption separation system, and it is expected to inspire further research into gate-type adsorbents with higher performances.



Title：High-throughput gas separation by flexible metal–organic frameworks with fast gating and thermal management capabilities
Authors：Shotaro Hiraide, Yuta Sakanaka, Hiroshi Kajiro, Shogo Kawaguchi, Minoru T. Miyahara, Hideki Tanaka
Journal：Nature Communications (published online 3 August 2020)
DOI：10.1038/s41467-020-17625-3