[Terrapreta] Another promising carbon capture technique
Green Waste Recycle Yard
info at GreenWasteRecycleYard.com
Wed Jan 30 19:51:18 CST 2008
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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