This website has a very useful interactive comparison tool with data on 24 large CDR focussed projects (Feb 2021).
Addressing the crisis of climate change requires action on several fronts. We now need large-scale deployment of carbon removal alongside critical reductions in emissions. Carbon removal refers to natural or technological approaches for removing carbon dioxide from the atmosphere. We’re a non-profit that analyzes carbon removal opportunities based on the best available science and data. We help organizations make specific decisions towards their carbon removal goals. And we work collaboratively to build open tools and resources for the evaluation and deployment of carbon removal and other climate solutions.”
“We collaborate with researchers to build open source data and tools for carbon removal and climate solutions. Through this work we produce datasets, models, interactive articles, and commentary on climate policies and programs.”
“Carbfix’s carbonated water reacts with the rock underground and elements such as calcium, magnesium and iron are released into the water. With time, these elements will combine with the dissolved CO2 and form carbonates filling up the empty space in the rocks underground. The carbonates are stable for thousands of years and can thus be considered permanently stored. The timescale of this process initially surprised the scientists. In the CarbFix pilot project, it was determined that at least 95% of the injected CO2 mineralises within two years, much faster than previously thought.”
“The theoretical storage capacity of the ocean ridges is significantly larger than the estimated 18,500 Gt CO2 stemming from the burning of all fossil fuel carbon on Earth. The question remains, how much of this theoretical storage capacity is feasible to use for mineral storage of CO2.”
There are approximately 40 million tonnes/year of CCS capacity operating today (the red bars). According to this paper the potential storage capacity is much greater than is required to return the atmosphere CO2 concentration down to the pre-industrial level of around 300 ppm.
“STORAGE CAPACITY IS NOT A CONSTRAINT. Geological storage resources for CO2 appear more than sufficient to meet global requirements under any net-zero emissions scenario. However, policy settings do not support a private business case for investment. Government funding of strategic storage resource appraisal programmes is essential.”
Global-Status-of-CCS-Report-2020_FINAL_December11.pdf The Norwegian full-scale CCS demonstration project. Potential for reduced costs for carbon capture, transport and storage value chains (CCS). A report by DNV-GL, Feb 2020.
Mineral Carbon International Canberra, Australia
An olivine based solution. “MCi is an Australian clean technology company transforming CO2 emissions into valuable materials that provide profitable decarbonisation pathways for the mining, manufacturing and energy sectors.“
“MCi transforms CO2 […] into low carbon building and construction products. Our technology provides a novel decarbonisation solution for industry that is not reliant upon carbon pricing, offsets or subsidies.” “[The method] has a very low process and energy cost, and is adaptable and scalable to integrate into many industrial scenarios such as mineral processing, steel, cement, hydrogen, gas and chemical production.”
“The patented Planetary Hydrogen Ocean Air Capture (OAC) technology uses renewable electricity to produce hydrogen via conventional electrolysis of water. We call our process SeaOH2. Our innovation is that by adding a mineral salt, we force the electrolysis cell to also create an atmosphere-scrubbing compound called mineral hydroxide as a waste product. That hydroxide actively binds with carbon dioxide, producing an “ocean antacid” very similar to baking soda.
The net effect is the direct air capture and storage of CO2 while producing valuable pure hydrogen. The system can consume as much as 40kg of CO2 and permanently stores it for every 1kg of hydrogen it produces.
This system accelerates “The Earth’s Natural Thermostat” which is the geological process that removes excess CO2 from the atmosphere via rock weathering that is otherwise very slow and inefficient. Excess CO2 in the atmosphere acidifies rainwater that on contact with alkaline minerals (exposed on much of the Earth’s land surface), dissolves the rock and consumes CO2, forming dissolved mineral bicarbonate which is washed into the ocean. This process is the reason that some 90% of the Earth’s surface carbon is in this form as seawater bicarbonate. While effective as a moderator of excess atmospheric CO2, it can take 100,000 yrs for the preceding process to naturally return atmospheric CO2 to “normal” levels.”
- Carbon cure
- Project Vesta
Please do send us your recommendations so that we can share with everyone, by sending us an email to:
Steve and Jerry