Published in Applied Energy

The study on “Demonstrating High-efficiency CO₂ Methanation” by Shogo Sayama and Seiji Yamamoto, was published in Applied Energy.

CO₂ methanation is an attractive technology for recycling industrial CO₂. We have been developing the system which converts CO₂ into CH₄ (the major component of city gas), using H₂ derived from renewable energy. This study realized more than 99% CO₂ conversion (conversion ratio of CO₂→CH₄) at a low pressure of 200 kPa・G, while recovering more than 70% of the redundant heat. Although some other studies also reached high conversion thus far, this study realized it at the low reaction pressure and high heat recovery ratio, applying reaction control by splitting the H₂ feed and thermal control by branching the carrier flow. It consequently leads to high energy efficiency of the conversion process. The present achievement promises to contribute to the realization of zero CO₂ emissions from factories.

Title: A 6-kW Thermally Self-sustained Two-stage CO₂ Methanation Reactor: Design and Experimental Evaluation of Steady-state Performance Under Full-load Conditions
Authors: Sayama, S., Yamamoto, S.
Journal Name: Applied Energy
Published: September 5, 2022
https://doi.org/10.1016/j.apenergy.2022.119773