Solar hydrogen (hydrogen obtained by catalytic water splitting under sunlight) is an ideal sustainable resource and can be utilized as a chemical resource via the combination with CO2. The 10 years program named “Artificial Photo Synthetic Chemical Process (ARPChem)” has been in progress since 2012 in Japan. The intrinsic issue of water spitting is to provide cheap hydrogen comparable to that from fossil resource. To pursue the higher efficiency (solar to hydrogen: STH) is important but it does not satisfy with the LCA aspect (smaller CO2 emission) and the economic aspect in some cases. We introduce the strategy of the ARPChem and the progress of the investigations including water splitting, hydrogen/oxygen separation, and olefin synthesis from solar hydrogen and CO2. We will show the updated performance of photo catalyst sheet manufactured by coating process, zeolite membrane for gas separation and innovative reactive separation process for olefin synthesis. Application of solar hydrogen to chemicals can be more attractive than that to fuel from a view point of CO2 mitigation and of value addition.

How to provide solar hydrogen and how to apply it? The activity of artificial photo synthetic chemical process project

253rd National Meeting (2017)

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