Submitted on April 6th, 2009 by Unregistered user (not verified)
gwash -
You post the same thing in multiple places, and there are a few things that should be pointed out.
1) Your numbers may be correct about the amount of water that would need to be processed to replace all cement in the US. But, who said they were going to replace it all? And, if they DID replace it all, wouldn't that then be a monopoly and raise more issues?
2) Do you know everyone at the company? Maybe there are some people there who know metabolic things. Besides, there is no guarantee they are using bacteria or microbes or whatever for this process. The two patents that are published are on a) carbonates in cement (US20090020044) and b) precipitating carbonates (US20090001020). Maybe they are using biological means, but we don't know for certain.
3) You should really re-read the '020 patent. They do not say they calcine the CaCO3 to form CaO and then react that with CO2 to form CaCO3. What they say is: "[0075] 25 g of granulated (Ca,Mg)O (a.k.a., dolime or calcined dolomite) was mixed into the seawater." The phrase "also known as" does not mean the same thing as "this is how we got it." I could say, "I like to eat cookies (a.k.a. baked cookie dough)" and that would not mean I somehow unbake the cookies only to bake them again before I eat them.
4) If you don't agree with me on point #3, you should read the reference so kindly pointed out by Ken Caldeira (i.e. Kheshgi 1995) in some of his posts. Figure 1 in the paper presents one scheme for sequestering CO2. "The production of 1 mole of CaO requires 0.41 mole of carbon in coal, and 1 mole of CaCO3. Combustion of C and decomposition of CaCO3 results in 1.41 moles CO2 emitted to the atmosphere. For each mole of CaO dissolved in the ocean, 1.79 moles of CO2 are absorbed by the ocean resulting in a net removal of 1.79-1.41 = 0.38 mole CO2 per mole CaO produced."
I think these points should satisfy all your arguments against Calera. I'd love to hear your thoughts.
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response to gwash
Submitted on April 6th, 2009 by Unregistered user (not verified)gwash -
You post the same thing in multiple places, and there are a few things that should be pointed out.
1) Your numbers may be correct about the amount of water that would need to be processed to replace all cement in the US. But, who said they were going to replace it all? And, if they DID replace it all, wouldn't that then be a monopoly and raise more issues?
2) Do you know everyone at the company? Maybe there are some people there who know metabolic things. Besides, there is no guarantee they are using bacteria or microbes or whatever for this process. The two patents that are published are on a) carbonates in cement (US20090020044) and b) precipitating carbonates (US20090001020). Maybe they are using biological means, but we don't know for certain.
3) You should really re-read the '020 patent. They do not say they calcine the CaCO3 to form CaO and then react that with CO2 to form CaCO3. What they say is: "[0075] 25 g of granulated (Ca,Mg)O (a.k.a., dolime or calcined dolomite) was mixed into the seawater." The phrase "also known as" does not mean the same thing as "this is how we got it." I could say, "I like to eat cookies (a.k.a. baked cookie dough)" and that would not mean I somehow unbake the cookies only to bake them again before I eat them.
4) If you don't agree with me on point #3, you should read the reference so kindly pointed out by Ken Caldeira (i.e. Kheshgi 1995) in some of his posts. Figure 1 in the paper presents one scheme for sequestering CO2. "The production of 1 mole of CaO requires 0.41 mole of carbon in coal, and 1 mole of CaCO3. Combustion of C and decomposition of CaCO3 results in 1.41 moles CO2 emitted to the atmosphere. For each mole of CaO dissolved in the ocean, 1.79 moles of CO2 are absorbed by the ocean resulting in a net removal of 1.79-1.41 = 0.38 mole CO2 per mole CaO produced."
I think these points should satisfy all your arguments against Calera. I'd love to hear your thoughts.