[Gasification] Gasification Digest, Vol 35, Issue 8

[David Murphy]

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 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>. /Proceedings of the
>> National Academy of Sciences
>> <http://en.wikipedia.org/wiki/Proceedings_of_the_National_Academy_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| /Vahid 
>> Biogas/, an alternative energy consultancy 
>> |www.vahidbiogas.com
>
>
>
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