[Stoves] [Digestion] [biochar] Orange Peels

frank at compostlab.com frank at compostlab.com
Sat Jun 25 10:12:54 PDT 2011


Alex, 

They are an assortment of 6" nipples and two end caps found at the local
hardware store. From 0.5" to 2" dia. Size used depends on the material texture
to be tested and the detection of balance used to get enough significant
figures. Also the size of the furnace used to heat to 450 deg. C. Flushing
with nitrogen makes little difference when one cap is on tight and the other a
turn loose to let the expanding gases out and the fuel is packed in tight. 

Frank 




On Sat, 25 Jun 2011 06:56:48 -0400, Alex English wrote
> Hi Frank,
> What are the dimensions of your pipe?
> 
> Alex
> 
> On 6/24/2011 10:24 PM, frank at compostlab.com wrote:
> > Stovers,
> >
> > Working on a new test package that anyone can do I decided to try it on
> > orange peels.
> >
> > Results:
> > moisture 88.8%
> >
> > Below tested on the dry fraction;
> > Mobile Matter = 67.1 %
> > Resident Char (ash calculated out so not included)  = 29.6 %
> > Ash = 3.3 %
> >
> > Below tested on the ash fraction
> > Acid soluble ash = 90.0 %
> > non-acid soluble ash = 10.0 %
> >
> > Meaning;
> > With 67.1% of the dry fraction going up in smoke (or volatiles) that can
> > be used for producer gas or running a gas burner stove.
> > The 29.6 %  char fraction DAF perhaps having around 80+ % carbon for
> > soil applications.
> > The small amount of ash (3.3%) is mostly acid soluble (90%) so made of
> > soluble nutrients and carbonates and oxides. If the ash was a lot high
> > than 3.3% with 90% acid soluble this char would likely have a high
> > calcium carbonate equivalent (CCE). The low (10% of the ash) non-acid
> > soluble = stones, dirt, phytoliths  etc.
> >
> > Method;
> > Moisture determined at 105 deg C.
> > Dry mater was ground and packed into a pipe with end caps on loose and
> > heated in a temperature controlled oven at 450 deg. C for 4 hours. Loss
> > of weight = Mobile matter
> > Char removed to a crucible and heated in air at 550 deg C to determine
> > total ash content. Loss in weight is char.
> > Acid added (50% HCl) to the ash and warmed / filtered through glass
> > fiber / dried 105 deg C and weighed to get the non-acid soluble fraction.
> >
> > This test package was suggested by Hugh as an inexpensive test package
> > to be used on char samples but I find also good for biomass as well.
> >
> > Frank
> >
> >
> >
> >
> >

--
Frank Shields
Soil Control Lab
42 Hangar Way
Watsonville, CA  95076
(831) 724-5422tel
(831) 724-3188fax
www.compostlab.com
www.greenrooflab.com




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