10:47:37 PM
Subject: RE: [geo] Re: Monbiot Claims SAI already tested ... with catastrophic
results
I'd be very careful about adding CaCO3 to 0.1M nitric acid, the reaction is
strongly exothermic. I'd cut the concentration and volume by 10 - 100x for
starters, wear safety glasses and conduct
@googlegroups.com]
On
Behalf Of David Zhong [shaojun.zh...@gmail.com]
Sent: Wednesday, September 28, 2011 11:23 AM
To: geoengineering
Subject: [geo] Re: Monbiot Claims SAI already tested ... with
catastrophic
results
Greg,
Phosphate ions are known to have a strong affinity for the reactive
sites
@googlegroups.com
Subject: Re: [geo] Re: Monbiot Claims SAI already tested ... with catastrophic
results
It's a long time since I did anything in this field, so this is some ad
hoc thinking.
Soil PCO2 is much higher than in the atmosphere. An old paper on this is ...
Drake, J.J. and Wigley, T.M.L., 1975
: [geo] Re: Monbiot Claims SAI already tested ... with catastrophic
results
Greg,
Phosphate ions are known to have a strong affinity for the reactive
sites of calcite and inhibit the dissolution (BERNER MORSE, 1974;
MORSE BERNER, 1979) as well as precipitation (MUCCI, 1986) reactions
]
Sent: Wednesday, September 28, 2011 11:23 AM
To: geoengineering
Subject: [geo] Re: Monbiot Claims SAI already tested ... with catastrophic
results
Greg,
Phosphate ions are known to have a strong affinity for the reactive
sites of calcite and inhibit the dissolution (BERNER MORSE, 1974
To: geoengineering
Subject: [geo] Re: Monbiot Claims SAI already tested ... with catastrophic
results
Greg,
Phosphate ions are known to have a strong affinity for the reactive
sites of calcite and inhibit the dissolution (BERNER MORSE, 1974;
MORSE BERNER, 1979) as well as precipitation (MUCCI, 1986
[shaojun.zh...@gmail.com]
Sent: Tuesday, September 27, 2011 11:43 AM
To: geoengineering
Subject: [geo] Re: Monbiot Claims SAI already tested ... with
catastrophic
results
Hi Greg,
Two comments here:
Limestone dissolution can be a very slow reaction, even in CaCO3-
undersaturated
Subject: [geo] Re: Monbiot Claims SAI already tested ... with catastrophic
results
Hi Greg,
Two comments here:
Limestone dissolution can be a very slow reaction, even in CaCO3-
undersaturated
upwelling seawaters. (Much slower than the rate of limestone
dissolution in normal
rainwater
: [geo] Re: Monbiot Claims SAI already tested ... with catastrophic
results
Greg,
Phosphate ions are known to have a strong affinity for the reactive
sites of calcite and inhibit the dissolution (BERNER MORSE, 1974;
MORSE BERNER, 1979) as well as precipitation (MUCCI, 1986) reactions
of calcite
To: geoengineering
Subject: [geo] Re: Monbiot Claims SAI already tested ... with catastrophic
results
Hi Greg,
Two comments here:
Limestone dissolution can be a very slow reaction, even in CaCO3-
undersaturated
upwelling seawaters. (Much slower than the rate of limestone
dissolution in normal
Hi Greg,
Two comments here:
Limestone dissolution can be a very slow reaction, even in CaCO3-
undersaturated
upwelling seawaters. (Much slower than the rate of limestone
dissolution in normal
rainwater, for example)
Adding limestone powders to the upwelling seawaters may in fact take
away
a
this time. No?
Regards,
Greg
From: geoengineering@googlegroups.com [geoengineering@googlegroups.com] On
Behalf Of David Zhong [shaojun.zh...@gmail.com]
Sent: Tuesday, September 27, 2011 11:43 AM
To: geoengineering
Subject: [geo] Re: Monbiot Claims SAI already
Re choice of minerals, it must really depend on what is locally
available so as to minimise transport costs and emissions - and
particularly to include readily available stocks of mine waste, for
example from nickel mines, diamond mines. Mine wastes are great as
there's lots of them, there is no
Actually this option does not look too bad on first sight - low cost,
low tech, so that's a good start, and the chemistry looks right too.
Biggest problem is the delay of approx 100y before the results come
through, if I read the paper right. That's a long time for us to have
to wait. Also if we
Somebody should do a preliminary cost analysis comparing the cost and
effectiveness (and uncertainty therein) for all of these proposals, as a
function of setting, discount rate, etc.
These options are not alternatives but complements. Doing more of one does
not preclude doing more of another.
There is a delay if air capture is the objective - limestone dissolution
takes place in the subsurface waters and alkalinity is generated, which can
effect air capture only when upwelling finally brings it in contact with
air. Gas diffusion rate and CO2 dissolution rate will then also affect the
Hi, I'm familiar with CQuestrate and Tim Kruger, but my understanding
is that this is all about kilning CaCO3 to CaO + CO2, then hydrating
CaO to Ca(OH)2, then putting that in ocean to react with CO2 to Ca++ +
2(HCO3)- - a net gain of one CO2. The problems are that this is energy
intensive, and in
As Greg Rau and I pointed out more than a decade ago, rather than kilning,
power plant flue gases can be used to dissolve carbonate minerals in
seawater. If it is placed in seawater dilutely, the time scale for
reprecipitation of these minerals should be thousands of years.
Whether it is better
, September 25, 2011 1:56:13 PM
Subject: [geo] Re: Monbiot Claims SAI already tested ... with catastrophic
results
This appears to be one of many ideas to mineralise CO2 using Mg
silicate rock using an industrial reaction process. The question has
to be, is this necessary or cost effective
Monbiot's real mistake here is to swallow the conclusion of the Royal
Society report on the subject, whole and undigested, without critical
scrutiny or attention to other sources of information - in particular
as regards the weathering of magnesium silicate (not enough Ca
silicate to bother with):
Oliver,
In his reference to Dumping lime or calcium or magnesium silicates
into
the sea..., George Monbiot was referring to the concept put forward
by Tim Kruger of Cquestrate - see www.cquestrate.com.
Chris Vivian.
On Sep 23, 12:40 pm, Oliver Tickell oliver.tick...@kyoto2.org wrote:
Monbiot's
Speaking of mineral carbonation, check out:
http://onlinelibrary.wiley.com/doi/10./j.1530-9290.2011.00368.x/abstract
;jsessionid=15DD453CB61D6B1B218D916F13507A2E.d01t01
-Greg
On 9/23/11 4:40 AM, Oliver Tickell oliver.tick...@kyoto2.org wrote:
Monbiot's real mistake here is to swallow the
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