![]() ![]() Limestone is calcium carbonate, which can be produced as a chemical combination of carbon dioxide, oxygen, and calcium.Ĭonstantz likes to point out that over 99.9% of all carbon on Earth resides in the limestone making up coral reefs, with the residual 0.1% residing in the atmosphere, non-reef component of the oceans, and biosphere. Thus far, corals do it successfully, and humans do not. ![]() Cement and coral reefs are both limestone, and therefore the issue involves how to make limestone in a way that does not produce large emissions of carbon dioxide. If successful, the firm claims that the end result is a double win: first, carbon dioxide from the production of energy is diverted from being emitted into the atmosphere, and is instead sequestered and second, the synthetic aggregate results in reduced emissions that would have been associated with the production of cement and concrete by conventional means.Īs for the cement, Brent Constantz has pioneered a way to manufacture cement which mimics the way that corals build reefs. Remember: 20Gt is about half of current annual emissions of CO 2.īlue Planet System’s idea is to capture carbon dioxide emissions from power plants and other sources, and use the CO 2 to manufacture the aggregate which goes into making concrete. Instead of being emitted into the atmosphere, plausibly, this 20 Gt of carbon dioxide can be sequestered at the Earth’s surface. Globally, asphalt has about the same carbon dioxide content as concrete, and so the two together contain just over 20Gt of carbon dioxide.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |