Look it from the other end. A first of a kind machine collects CO2 at $600 per
ton. Compared to the first solar panel this is a steal. It has a much
smaller footprint than a forest with the same CO2 collection capacity. And
presumably it will get better over time. This is not a CDR scheme, this is a
scheme to provide CO2 to a greenhouse. Later, when the price comes down you
can attach it to a CDR scheme. I have seen algae growers pay more than $600
per ton of CO2 to have it delivered in a tanker truck.
So this is a first starting point to show that you can collect CO2 from the air
at a cost which is one-order-of magnitude higher than what makes commercial
sense. Most first of a kind do that. This cost is not much different than
what it costs the flue gas scrubbers on a first try. Now we have a baseline
from which to make things better.
Klaus
PS There are ways to eliminate the fans (and their energy consumption), there
are ways of reducing the heat demand. So let’s see how to make it better,
rather than trying to strangle the technology in the cradle
From: <geoengineering@googlegroups.com> on behalf of Greg Rau
<gh...@sbcglobal.net>
Reply-To: Greg Rau <gh...@sbcglobal.net>
Date: Thursday, July 27, 2017 at 11:23 AM
To: Geoengineering <geoengineering@googlegroups.com>
Subject: [geo] More on Climeworks
via Roger Streit:
https://www.reuters.com/article/us-climatechange-geoengineering-idUSKBN1AB0J3<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.reuters.com_article_us-2Dclimatechange-2Dgeoengineering-2DidUSKBN1AB0J3=DwMFaQ=l45AxH-kUV29SRQusp9vYR0n1GycN4_2jInuKy6zbqQ=hFjA8A8KwwhQx5qilpfIleTL0XYVr_fckT8DnwIEWlQ=PmvpmCUiHB8MrniRdVHBs5GzsTOSCZtynNv-eul7dlE=ldLtHFlkGiTMYEyZEk8tDTVGae5179KVvJgn81k-_IY=>
Some interesting factoids:
"...Climeworks began to suck greenhouse gases from thin air in May with giant
fans and filters in a $23 million project that it calls the world's first
"commercial carbon dioxide capture plant""
"Climeworks reckons it now costs about $600 to extract a tonne of carbon
dioxide from the air and the plant's full capacity due by the end of 2017 is
only 900 tonnes a year. That's equivalent to the annual emissions of only 45
Americans."
>From the Climeworks website: "The majority of the energy required to run the
>direct air capture plant comes from low-grade/waste heat." But what source of
>electricity is powering the fans? If grid electricity then the C footprint
>must be subtracted from the CO2 captured. How much? Also the CO2 is used to
>grow food/plants, so the storage lifetime is <1yr. So is this a CDR scheme or
>a CO2 emissions reduction scheme (by avoiding fossil-derived CO2 use)?
900 tonnes of CO2 extracted/yr: Assuming that a growing forest consumes and
stores 5 tonnes CO2 yr^-1ha^-1, Climeworks is consuming CO2 at a rate
equivalent to that of 180 hectares of forest. Cost/benefit/tradeoffs?
Greg
""Relying on big future deployments of carbon removal technologies is like
eating lots of dessert today, with great hopes for liposuction tomorrow,"
Christopher Field, a Stanford University professor of climate change, wrote in
May."
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