Reducing emissions by making cement from seawater and powerhouse smoke

From a colleague at SOPAC:

For those interested in marine science, climate change, emission reduction, energy and building aggregates (which I think means all of us!) you may find the following story and links interesting;

…Constantz realized that cement manufacturers, by emulating coral, could meet that demand even as they actually reduced the total amount of carbon dioxide released into the atmosphere. Moreover, they could sequester the raw materials from the world’s single largest carbon-dioxide emitter, electric power plants. In 2009 his latest company, Calera, started putting that insight into practice at a 1,000-megawatt power plant in Moss Landing, California. Engineers there spray mineral-rich seawater or brine water through flue gas captured from the plant’s smokestacks. The calcium in the water bonds with carbon in the would-be pollution to form cement. Constantz says the demonstration plant is capable of producing up to 1,100 tons of cement a day and, in doing so, sequestering 550 tons of carbon dioxide. Within three years, he says, Calera will be operating plants in Australia and Wyoming.

Constantz notes as well that, unlike other sequestration schemes, his plan for capturing carbon emissions is proven. For at least 600 million years, sea creatures have been “sequestering” carbon dioxide in their skeletons, which have compacted over time to form all the limestone on Earth—the very stuff we now heat to make cement. Instead of turning stone to carbon dioxide, we can turn carbon dioxide into “stone,” locking it away forever in the concrete foundations of our cities. “When we think of climate change,” Constantz says, “the main lever we have is putting carbon back in the geologic record.”

http://www.popsci.com/bown/2010/innovator/cement-thin-air

http://www.scientificamerican.com/article.cfm?id=cement-from-carbon-dioxide

Advertisements

About Alan

Alone in a sea of spinifex.
This entry was posted in Life, don't talk to me about life!. Bookmark the permalink.

One Response to Reducing emissions by making cement from seawater and powerhouse smoke

  1. Pilgrim says:

    “would-be”.
    The abominable anthropomorphic fallacy.
    Even “top” journos do it.

    Like

Please comment!

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s