[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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