[Gasification] Hi Gasification Digest, Vol 35, Issue 8

[Mark Ludlow]

Hi Peter,

Perhaps you could kit-up requirements and typical formulas
(provide feed samples!) and Outsource your analytical lab
needs. Lots of accredited labs in unexpected places, (as
well as expected places such as México), may help to make
some of this burden much less onerous.

Very Best, Mark

 

From: Gasification
[mailto:gasification-bounces at lists.bioenergylists.org] On
Behalf Of David Murphy
Sent: Wednesday, July 17, 2013 4:38 PM
To: Discussion of biomass pyrolysis and gasification
Subject: Re: [Gasification] Gasification Digest, Vol 35,
Issue 8

 

Good going Peter.   Good  to see you still at it.

David Murphy.

On 18/07/2013 6:00 AM, Peter & Kerry Davies wrote:

I wouldn't recommend burning glycerin either.

We have successfully gasified Gycerin waste from a biodiesel
plant added to wood chip without any measured toxic
emissions, indeed it produced a higher calorific value gas
compared to straight wood chip as it displaced the need for
some of the normal air as an oxygen source (thereby reducing
dilution with the normal nitrogen fraction as well as
releasing more H2 from the added gycerin itself) so would
not anticipate any issues with it as a binder in pellets
where they were used in this way (at least through our
system). We will have the opportunity to test this at least
in the form of briquettes after August. The combustion
engineers present for the earlier test were all a bit red
faced at the time as I recall since they were predicting all
sorts of dire things. 

We are going through an EPA process at the moment to have
our system "exempted" from the need for pollution permits,
starting with clean wood waste as the benchmark but will be
adding things like plastics and glycerin (along with much
more problematic organics) in due course.

The real barrier to overcome is the insistence by the
ignorant or mischievous in the environmental movement that
gasification and combustion are interchangeable terms with
similar problems. The result from a practical point of view
is the cost of the stringent emission tests required is in
the order of $25,000 per material being included where no
dioxins are anticipated and only one targeted analysis for
this is included (amongst the 20 general sample tests
required) to confirm, up to $150,000 should they believe
dioxins might be possible and this has to be repeated with
all 20 samples.

What is amazing to us is our perpetual researcher
"competitors" in this space in Australia generally have
access to significant public grants, yet can't give a lab
certified gas analysis from their systems only a "predicted"
value based on a literature review, mostly of course citing
references where the same thing was done...

Peter Davies



On 18/07/2013 4:00 AM,
gasification-request at lists.bioenergylists.org
<mailto:gasification-request at lists.bioenergylists.org>
wrote:

On 7/16/2013 5:27 PM, J. Paul Villella wrote:

> other possible suitable binders are Long Strand Glycerines
from the 
> production of Biodiesel (they burn like plastic too but
need a 
> stabilizer/wick/co-burn agent )

Out of the frying pan and into the fire.
 
Burning glycerine produces acrolein. For some indications of
its 
toxicity, see Feng, Z; Hu W, Hu Y, Tang M (October 2006).
"Acrolein is 
a major cigarette-related lung cancer agent: Preferential
binding at 
p53 mutational hotspots and inhibition of DNA repair" 
 <http://www.pnas.org/cgi/reprint/0607031103v1>
<http://www.pnas.org/cgi/reprint/0607031103v1>. /Proceedings
of the 
National Academy of Sciences 
 
<http://en.wikipedia.org/wiki/Proceedings_of_the_National_Ac
ademy_of_Sciences>
<http://en.wikipedia.org/wiki/Proceedings_of_the_National_Ac
ademy_of_Sciences>/ 
*103* (42): 15404--15409.
 
Better to compost the glycerine, make soap, or produce
biogas.
 
 
d.
-- 
David William House
"The Complete Biogas Handbook" |www.completebiogas.com
<http://www.completebiogas.com> |
/Vahid Biogas/, an alternative energy consultancy
|www.vahidbiogas.com <http://www.vahidbiogas.com> 







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