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posted by mrpg on Wednesday June 13, @04:31AM   Printer-friendly
from the hot-on-the-heels-of-fresh-water-from-air dept.

Sucking carbon dioxide from air is cheaper than scientists thought

Siphoning carbon dioxide (CO2) from the atmosphere could be more than an expensive last-ditch strategy for averting climate catastrophe. A detailed economic analysis published on 7 June suggests that the geoengineering technology is inching closer to commercial viability.

The study, in Joule, was written by researchers at Carbon Engineering in Calgary, Canada, which has been operating a pilot CO2-extraction plant in British Columbia since 2015. That plant — based on a concept called direct air capture — provided the basis for the economic analysis, which includes cost estimates from commercial vendors of all of the major components. Depending on a variety of design options and economic assumptions, the cost of pulling a tonne of CO2 from the atmosphere ranges between US$94 and $232. The last comprehensive analysis of the technology, conducted by the American Physical Society in 2011, estimated that it would cost $600 per tonne.

Carbon Engineering says that it published the paper to advance discussions about the cost and potential of the technology. "We're really trying to commercialize direct air capture in a serious way, and to do that, you have to have everybody in the supply chain on board," says David Keith, acting chief scientist at Carbon Engineering and a climate physicist at Harvard University in Cambridge, Massachusetts.

A Process for Capturing CO2 from the Atmosphere (DOI: 10.1016/j.joule.2018.05.006) (DX)

Direct Air Capture of CO2 with Chemicals (2011)


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  • (Score: 2) by c0lo on Wednesday June 13, @05:15PM (3 children)

    by c0lo (156) on Wednesday June 13, @05:15PM (#692413)

    You'll probably want it paid for by the government (read: tax payers) whichever you pick though, knowing you.

    Wrong as usual, you know dinky-shit about me, mate

    Oh, wait, I get it now. You're wanting something of value without it costing anything.

    I want more that fishing-chair handwaving solutions, like the one about building artificial islands.

    Something like: how about stopping deforestation? How about intensive (as opposed to extensive) agricultural practices - permaculture, crop rotation and the like? How about having each home build with high energy conservation rating/low energy footprint as opposed to profit maximization in mind?
    How about returning to durable goods as opposed to planned-obsolescence practices? (up until 1 year ago I was still happily using a 7yo dumb-mobile, I only needed to switch to a smart one because of "two factor auth" for telecommuting).

    How about searching for other solutions? Here [nature.com], for example

    In February 2004, researchers involved in the European Iron Fertilization Experiment (EIFEX) fertilized 167 square kilometres of the Southern Ocean with several tonnes of iron sulphate. For 37 days, the team on board the German research vessel Polarstern monitored the bloom and demise of single-cell algae (phytoplankton) in the iron-limited but otherwise nutrient-rich ocean region.

    Each atom of added iron pulled at least 13,000 atoms of carbon out of the atmosphere by encouraging algal growth which, through photosynthesis, captures carbon. In a paper in Nature today, the team reports that much of the captured carbon was transported to the deep ocean, where it will remain sequestered for centuries1 — a 'carbon sink'.

    Are you attracted by handwaving solutions? Here's one, how about nuke-glassing an entire oil-field desert and covering it by photopanels with batteries underneath, then running power cables? Each sqm produces at peak about 200W (at current efficiencies); at 2.15 million sqkm of glassed Saudi Arabia covered in solar panel will produce in one (peak) hour 0.43 TWh of energy. At an equiv of 5 peak-hours/day for an entire year, this amounts for 784TWh of energy.
    For comparison, the entire world electric energy generated from all sources in 2013 was 19,504 TWh [wikipedia.org]. Well, waddaya know? About the 40% of all electric energy for only the price of nuking a desert - yes, we need to nuke it first (use clean A-bombs) as an engineering solution for fixing that sand down and keeping the solar panels clean.
    I wonder what's not to like in this handwaving solution? (grin)

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  • (Score: 2) by The Mighty Buzzard on Thursday June 14, @05:03AM (2 children)

    Are you sure you really want solutions? Deforestation would solve the problem better than anything. Trees are by far not the most efficient plants at sequestering carbon.

    --
    Cobra Kai
    • (Score: 2) by c0lo on Thursday June 14, @05:37AM (1 child)

      by c0lo (156) on Thursday June 14, @05:37AM (#692727)

      Trees are by far not the most efficient plants at sequestering carbon.

      Seems to me I detect a whiff of "Nirvana fallacy" here.
      Tell you what: how about, as a proof of goodwill, one shows me the planting of a new improved efficiency species of carbon-sink vegetation on an already deforested significant area before deforesting others.

      Maybe it's my age, but I tend to distrust solutions which promise a Nirvana replacement only after I renounced/demolished all the other good things. See?... no warranties that the Nirvana will be actually delivered, why should I take the deal?

      Are you sure you really want solutions?

      I'm quite sure I do not want handwaving solutions.

      • (Score: 2) by The Mighty Buzzard on Saturday June 16, @05:10AM

        You're spinning your own Nirvana if you think cleared land is going to be used for altruistic carbon capture rather than profitable farming. You will in fact find not nearly enough people to work one small bamboo farm for free, even if the valuable land were donated. See, farming is hard fucking work and tree huggers made their parents pay who knows how many thousands of dollars for the express purpose of them not ever having to work hard.

        --
        Cobra Kai