[Gasification] Sweden's trash project / Japanese trash project

doug.williams Doug.Williams at orcon.net.nz
Sat Nov 10 14:35:14 PST 2012

Hi John,

Nice to hear from you again, it's been quite a while since your char project began, and I met up with you in Scott Valley.

You ask an interesting question with a some what open answer:

>I am curious about the chlorides involved in the trash (plastics)? Would not there be a dioxin problem?  
> John Miedema
>BioLogical Carbon, LLC
Without a detailed description of the process used, we can guess all we like, and then to know just what they do destroy in that process could probably give a reasoned answer. Certain types of downdraft gasification can minimize any dioxin emission if chlorinated plastics are in the fuel mix, just by preventing CH4 from surviving the oxidation and reduction process. I would want to see wood or charcoal as the carrier fuel for these plastics.

I just Goggled Chlorinated Plastics and came up with a heap of reading, but other than showing that there are potential pathways to dispose of these plastics, any gasifier system being proposed without a proven history for this application would need a very rigorous test programme. 

Doug Williams
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