Can 'Green Cement' Make Carbon Capture and Storage Obsolete? - NYTimes.com
There are a growing number of companies and investors that are betting
this conventional wisdom is wrong. They are supporting technologies that
will separate and then trap carbon emissions in a series of "beneficial
products" that can be shipped to markets and sold at a profit. That,
they assert, will avoid the need for much of the carbon capture and
storage (CCS) infrastructure now on energy planners' drawing boards.
The most outspoken salesman for this approach is Brent Constantz, who
has spent much of his career studying, patenting and marketing new ways
to make cement. He believes that what he calls "green cement," which
starts as a milky precipitate made from injecting carbon dioxide from
power plant emissions into seawater, can be made and sold at a profit.
In the Constantz scenario, his "green" cement and "green" aggregate that
is used to make concrete would begin to take market share from
conventional cement makers, which are the nation's third-largest source
of CO2 emissions behind the utility and transportation sectors.
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