Direct mineralization of atmospheric CO2using natural rocks in Japan | Zendy

Corey Myers | Zendy; Takao Nakagaki | Zendy

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Direct mineralization of atmospheric CO₂using natural rocks in Japan

Author(s) -

Corey Myers,

Takao Nakagaki

Publication year - 2020

Publication title -

environmental research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.37

H-Index - 124

ISSN - 1748-9326

DOI - 10.1088/1748-9326/abc217

Subject(s) - mineralization (soil science) , greenhouse gas , environmental science , natural gas , atmospheric sciences , environmental chemistry , soil science , geology , chemistry , soil water , oceanography , organic chemistry

Gas-solid mineralization of atmospheric CO 2 using naturally abundant surface rocks under ambient conditions and without thermochemical treatment was analyzed for application in Japan. Based on an empirically-verified theoretical framework, a tiered greenhouse containing finely ground rocks was designed with low-speed induced airflow to realize CO 2 mineralization reactions over 1 year. Negative CO 2 emissions were calculated accounting for CO 2 emissions from energy generation, materials production, and removal of vegetation and soil. Under practicable operating conditions, negative emissions using crystalline surface rocks in Japan can reach ∼7.6 Gt-CO 2 /y achieved across 726 sites. The average energy requirement was calculated to be 1.5 GJ t −1 -CO 2 with an average land requirement of 1.1 km 2 per Mt-CO 2 annual removal capacity. Carbon debt is paid off after 60 d of operation.

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