"Mechanical trees" capture CO2 in the atmosphere
Marie Donlon | May 01, 2019“Mechanical trees” developed by researchers at Arizona State University and brought to market by a Dublin-based company will be erected in parts of the U.S. to capture carbon dioxide (CO2) from the atmosphere, thereby removing the gas thought largely responsible for climate change.
Dubbed “mechanical trees” for their resemblance to actual trees in both stature and carbon-capturing ability, Silicon Kingdom Holdings (SKH) intends to erect 1,200 of the slender metal columns — enough to capture roughly 8,000 cars’ worth of CO2 emissions each year — in the U.S. within a year. The company’s objective is to capture CO2 using the filter-like components installed in the mechanical trees for less than the cost of other carbon-capturing measures. Reliant on wind to force air through its system rather than energy-intensive mechanisms, the mechanical trees capture the CO2. Once extracted the CO2 can either be sequestered or sold for commercial use.
Although it is unclear where the mechanical trees will be erected, some experts suggest that the pilot program could be the world’s largest “direct air capture” operation to date.
Similarly, SKH would not reveal how much building the pilot would cost, explaining instead that it was “in discussions with a range of potential funders and strategic partners from the aviation, energy and food and beverage industries.”
Interesting idea. One concern is the volume of CO2 generated--would it flood the present market?
An additional idea--could "high volumn" devices be placed in the stacks of combustion-type generating plants to capture CO2 at the source?
In reply to #1
Capturing to make some useful chemical such as methanol would be nice, but capture to sell is not going to be very profitable, since you can collect it so much easier at the source (such as coal power plants) before releasing it into ambient air.
Lots of chemical and industrial processes produce large amounts of CO2 at very high concentrations. Making hydrogen from CH4 is one example.
This is intended as a publicity thing for companies releasing a lot of CO2 to buy "capture credits" to make themselves seem climate neutral.
Olof