{"id":"doi:10.1038/s41467-020-16510-3","kind":"article","title":"Ambient weathering of magnesium oxide for CO2 removal from air","authors":["Noah McQueen","P. B. Kelemen","Gregory M. Dipple","Phil Renforth","Jennifer L. Wilcox"],"author_count":5,"year":2020,"published":"2020-07-03","venue":"Nature Communications","cited_by":209,"doi":"10.1038/s41467-020-16510-3","arxiv_id":null,"nct_id":null,"source_url":"https://doi.org/10.1038/s41467-020-16510-3","archive_url":"https://space-kitty.com/papers/doi:10.1038/s41467-020-16510-3","updated":null,"pmid":"32620820","pmcid":null,"openalex_id":"W3038405344","pdf_url":"https://www.nature.com/articles/s41467-020-16510-3.pdf","abstract":"Abstract To avoid dangerous climate change, new technologies must remove billions of tonnes of CO 2 from the atmosphere every year by mid-century. Here we detail a land-based enhanced weathering cycle utilizing magnesite (MgCO 3 ) feedstock to repeatedly capture CO 2 from the atmosphere. In this process, MgCO 3 is calcined, producing caustic magnesia (MgO) and high-purity CO 2 . This MgO is spread over land to carbonate for a year by reacting with atmospheric CO 2 . The carbonate minerals are then recollected and re-calcined. The reproduced MgO is spread over land to carbonate again. We show this process could cost approximately $46–159 tCO 2 −1 net removed from the atmosphere, considering grid and solar electricity without post-processing costs. This technology may achieve lower costs than projections for more extensively engineered Direct Air Capture methods. It has the scalable potential to remove at least 2–3 GtCO 2 year −1 , and may make a meaningful contribution to mitigating climate change.","abstract_license":"CC-BY (publisher license, via OpenAlex)","license":"cc-by","is_open_access":true,"retracted":false,"peer_reviewed":null,"categories":["Carbon Dioxide Capture Technologies"],"details":null,"provenance":"openalex","attribution":"Abstract of \"Ambient weathering of magnesium oxide for CO2 removal from air\" by Noah McQueen, P. B. Kelemen, Gregory M. Dipple et al., https://doi.org/10.1038/s41467-020-16510-3, used under its Creative Commons Attribution license (CC-BY); markup removed, otherwise unmodified.","topics":[{"slug":"carbon-removal","name":"Carbon Dioxide Removal","domain_slug":"energy"}],"cited_in_dossiers":[]}