[Gasification] plastic gasification?

[Judex Johannes]

Hey,

though i am not realy into the gasification of plastics, there 
is a publication from a Finish group around Ron Zevenhoven about 
the gasification of plastics.
citation:

==============================================================
Zevenhoven, R.; Karlsson, M.; Hupa, M. & Frankenhaeuser, M. 
Combustion and Gasification Properties of Plastics Particles 
J. Air & Waste Management Association, 1997, 47, 861-870
==============================================================

The abstract might give you some insight:

http://secure.awma.org/journal/ShowAbstract.asp?Year=1997&PaperID=394
alternative
http://www.osti.gov/energycitations/product.biblio.jsp?osti_id=544595


could be a start...

jO.




-----Ursprüngliche Nachricht-----
Von: gasification-bounces at listserv.repp.org [mailto:gasification-bounces at listserv.repp.org] Im Auftrag von jim mason
Gesendet: Freitag, 12. Oktober 2007 21:46
An: Discussion of biomass pyrolysis and gasification
Betreff: [Gasification] plastic gasification?

what is the experience here with gasifying plastics?  though i've mixed in small amounts of PET, i've never tried to run completely on it or others.

my first guess is that it will not work, as there is usually no fixed, independent carbon in plastic, but rather various polymers, repeating.
 thus it seems it will not form char.  or maybe the hydrogen to carbon bonds are weaker than the carbon to carbon bonds, and thus under heat the hydrogens come off first, leaving long chains of double bonded carbons?  this is what the molecule looks like:
http://en.wikipedia.org/wiki/Polyethylene.

"gasifying" plastics seems like it would be better done as thermal "vaporization".  heat alone should break the double bonds of things like PET, and what should come off is ethelyne (C2H4) molecules.  the monomer form.  such would be useful in many directions.

anyone have a summary of the thermal handling of plastics in various families?  i continue to rue my minimal organic chemistry background .
. .

j




--------------------------------------------------------------------------------
jim mason
website: www.whatiamupto.com
current project: mechabolic (http://www.mechabolic.org) announce list: http://lists.spaceship.com/listinfo.cgi/icp-spaceship.com

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