Kathleen B. Aviso, Jui-Yuan Lee, Aristotle T. Ubando & Raymond R. Tan
Enhanced weathering is a negative emissions technology based on the accelerated weathering of alkaline minerals. Such materials can be reduced to a fine powder and applied to land sinks to maximize the area exposed for reaction with rainwater and dissolved CO2. The carbon is captured in the form of bicarbonate ions in the runoff, which ultimately carries it to the ocean for virtually permanent sequestration. Enhanced weathering has been demonstrated in proof-of-concept laboratory and field tests, but scale-up to a level that delivers significant CO2 removal is still ...
David J. Beerling, Jonathan R. Leake, Stephen P. Long, Julie D. Scholes, Jurriaan Ton, Paul N. Nelson, Michael Bird, Euripides Kantzas, Lyla L. Taylor, Binoy Sarkar, Mike Kelland, Evan DeLucia, Ilsa Kantola, Christoph Müller, Greg Rau & James Hansen
The magnitude of future climate change could be moderated by immediately reducing the amount of CO2 entering the atmosphere as a result of energy generation and by adopting strategies that actively remove CO2 from it. Biogeochemical improvement of soils by adding crushed, fast-reacting silicate rocks to croplands is one such CO2-removal strategy. This approach has the potential to improve ...
Mike E. Kelland, Peter W. Wade, Amy L. Lewis, Lyla L. Taylor, Binoy Sarkar, M. Grace Andrews, Mark R. Lomas, T. E. Anne Cotton, Simon J. Kemp, Rachael H. James, Christopher R. Pearce, Sue E. Hartley, Mark E. Hodson, Jonathan R. Leake, Steven A. Banwart, David J. Beerling
Land-based enhanced rock weathering (ERW) is a biogeochemical carbon dioxide removal (CDR) strategy aiming to accelerate natural geological processes of carbon sequestration through application of crushed silicate rocks, such as basalt, to croplands and forested landscapes. However, the efficacy of the approach when undertaken with basalt, and its potential co-benefits ...
P. Renforth*, C.-L. Washbourne, J. Taylder, and D. A. C. Manning
Atmospheric carbon dioxide sequestered as carbonates through
the accelerated weathering of silicate minerals is proposed as a climate change
mitigation technology with the potential to capture billions of tonnes of carbon
per year. Although these materials can be mined expressly for carbonation, they
are also produced by human activities (cement, iron and steel making, coal
combustion, etc.). Despite their potential, there is poor global accounting of
silicates produced in this way. This paper presents production estimates (by
proxy) of various ...
The field of mineral sequestration for the long-term storage of carbon dioxide is a CCS (carbon dioxide capture and storage) option that provides an alternative for the more widely advocated method of geological storage in underground cavities, especially at locations where such underground cavities are not available, where the risk of leakage of the CO2 stored underground is considered unacceptable, or where large resources of material suitable for carbonation are present. Although the state of the art of mineral carbonation processing technically suffers from too slow chemical kinetics and poor energy economy, the driving forces for continued ...