[Terrapreta] Another promising carbon capture technique

[jim mason]

thank you for the numbers bernie.  they were very interesting.  and
also highlighting the point of availability of ash, and in particular
calcium, for the proposed carbonation process.

i would be interested in hearing more about the cogen plant to where
you send your material.  as i am near you, i might be interested in
visiting it.  i'm always curious about biomass based energy efforts in
the area.

jim



On Jan 30, 2008 5:51 PM, Green Waste Recycle Yard
<info at greenwasterecycleyard.com> wrote:
> Hi Jim,
>
> I see what you mean about "accounting", that you are basically just speeding
> up a process that is already going to occur.
>
> I thought it might be interesting for you to see an analysis of the biomass
> we send to a local cogen plant, who does pretty rigorous testing. I've
> picked one testing that was close to the their spec. Some of our loads are
> over spec, most under. Our loads have a lot of eucalyptus, which has low ash
> content compared to other wood feedstocks. Pine makes up a good part of the
> rest of our biomass.
>
> Where the cogen plant has a specification, I've listed it in parentheses.
>
> Bernie
>
> Proximate Analysis - Dry Basis (%)
> Ash                      3.09   (Spec <5.0)
> Volatile                79.13
> Fixed Carbon    17.78
> Total                100
>  % Chlorine (dry basis)         0.046
> BTU/lb (HHV)    8343    (Spec >8200)
> Moisture             31.83      (Spec <40)
>
> Ultimate Analysis - Dry Basis (%)
> Carbon     51.16
> Hydrogen        5.93
> Nitrogen        0.22
> Sulfur  0.05    (Spec <0.1)
> Ash           3.09
> Oxygen     39.55
> Total     100
>
> Elemental Analysis of Ash (%)
> Silica     37.31
> Alumina 7.36
> Titanium        0.36
> Iron        2.94
> Calcium    20.8
> Magnesium       4.48
> Sodium  2.28
> Potassium       8.26
> Phosphorus      3.77
> Sulfate 0.82
> Chlorine        0.22
> CO2        12.22
> Total     100.82
>
> lb alkali/mmBTU 0.39
> lb ash/mmBTU    3.71
> lb SO2/mmBTU    0.12
>
> Metals in Ash (mg/kg)
> Arsenic 9.09    (Spec <100)
> Lead       90   (Spec <200)
>
> Metals in Ash (lbs/BDT)
> Arsenic 0.0006  (Spec <0.0105)
> Lead        0.0058      (Spec <0.0210)
>
>
>
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>



-- 
--------------------------------------------------------------------------------
jim mason
website: www.whatiamupto.com
current project: mechabolic (http://www.mechabolic.org)
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