[Gasification] Torrified woodchips as a gasifier fuel

[Rolf Uhle]

Max,
I don´t know tto which reports on pollution created by wvo or svo you refer.
There was a kind of campaign in german media  some time ago, but the tests 
they made were in totally unprepared vehicles and much contested.
Do you have any trustworthy analisis/data ?
I would apreciate them.
Tanks
Rolf


----- Original Message ----- 
From: "Max Kennedy" <vacuum1313 at yahoo.ca>
To: "Discussion of biomass pyrolysis and gasification" 
<gasification at listserv.repp.org>
Sent: Wednesday, August 01, 2007 5:32 AM
Subject: Re: [Gasification] Torrified woodchips as a gasifier fuel


> "Straight veggie oil is much, much more polluting than fossil diesel
> fuel, but biodiesel is a good bit less polluting than fossil diesel."
>
> If one only looks at comparing the 3 fuels themselves, this is true. 
> However if one takes into account the imbedded energy/pollution of each in 
> addition to that produced by using the end product then the WVO is far 
> less costly both in energy costs and in total pollution produced.  For 
> example diesel has to have added the extraction costs, the environmental 
> impact costs (such as the Vancouver pipeline rupture), the refining energy 
> costs etc.  The biodiesel has to include the energy/pollution in the 
> process and process chemicals such as methanol and sodium hydroxide as 
> well as disposal of the glycerine etc.  Yes, WVO has imbedded costs for 
> processing, transport etc but they are lower as the material is far less 
> processed and the costs are shared with the food industry as that was the 
> primary use of the WVO.  An example of re-use advantage.  This last 
> consideration is not true of diesel and partially true of biodiesel 
> depending on the ratio of WVO in the
> BD.  The end use only mindset, which the starting quote embodies, needs to 
> be replaced with a total cycle cost mindset.  That is not to say those on 
> the list aren't aware these "hidden" costs exist however it is to say that 
> the language we choose to use influences the thinking processes both of 
> ourselves and those we talk to.  Just because some of the pollution to 
> produce the more refined BD doesn't come from our tailpipe, originating 
> from the methanol plant or the production of NaOH instead, doesn't mean 
> that the pollution doesn't exist and isn't harmful.
>
> Off the soap box.
>
> The idea of trapping the waste carbon and using the waste heat from a WVO 
> powered diesel using biomass destined for gasification sounds excellent to 
> me and is a great example of whole cycle thinking that will truely 
> overcome todays challenges in the future.
>
> Max K
>
>
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