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Comment Processing & Handling

Demonstration of a new CO2-methanation process

By Tetso Satoh |

The first phase of a study on the feasibility of producing methane from CO2 has been completed by Hitachi Zosen Corp. (Tokyo; www.hitachizosen.co.jp) and Daiki Ataka Engineering Co. (Daiki Ataka) a subsidy of Hitachi Zosen, in collaboration with PTT Exploring and Production Public Co. (Thailand). The companies have been collaborating since 2012 to develop a methanation process to convert CO2, which is generated during natural gas extraction, into CH4. The process uses a nickel-based catalyst — developed by Daiki Ataka and Koji Hashimoto, professor emeritus of Tohoku University — and H2 from electrolysis of water using renewable energy sources, such as wind or solar. The tests have been performed on an integrated tubular-reactor system (5-m long tubes) with a production capacity of 1,000 Nm3/h. When operated at the relatively low temperature of 200°C, the system achieved a H2 conversion of 99.3% — claimed to be the highest in the world (90% conversion for existing high-performance methanation catalysts). The new catalyst contains no rare-earth metals, such as ruthenium, which is used in conventional methanation catalysts. Over the next three years, the companies plan to scale up the process in Phase II. Earlier…
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