Posted 11 February 2010 - 01:01 AM
Is there any way to strip the lead out during gasification? The particulate lead would need to be cleaned from the gas going to an engine (typically running a generator). But, would there be enough lead that passed say a 5 micron particulate filter to pose an environmental risk?
If so, could we use some sort of catalytic converter on the exhaust of the genset? Wet scrubber? Electrostatic precipitator?
Having spent right at 2/3 of my life in Louisiana (and more than one hurricane), I see great need and strong potential for a means to convert storm debris into fuel for gasification. But... what about the lead paint?
Posted 12 February 2010 - 01:24 AM
Filter as best you can and burn away
Posted 15 February 2010 - 07:36 PM
Hey, know anybody with a wire welder for sale? CHEAP?
Posted 15 February 2010 - 07:44 PM
Having heavy metals in fuels is of concern. I haven't researched this area fully, but there may be potential. Of course, handling these types of materials is a definite "don't try this at home" area. But with research, monitoring, and development, there may (or may not) be viable options to prevent Pb emissions and properly handle these materials.
As a starting point, you might look at this MS Thesis:
A. Klein, “Gasification: An Alternative Process for Energy Recovery and Disposal of Municipal Solid Wastes,” Columbia University, 2002. http://www.seas.colu...lein_thesis.pdf
Posted 16 February 2010 - 04:02 AM
And yes, this is definitely not for the DIY crowd.
By the way, one of my chemist buddies who has lots of experience making pellets and briquettes also does work with bugs. I was looking at dropping out hexavalent chromium from some rinsewater but he said he has a better idea. Bugs. He has "fine tuned" bugs to convert all sorts of haz waste into soil amendments. That's the creative thinking I want to get involved in gasification.
It's out there... just a matter of making connections. I call it "imagineering".
Posted 07 February 2013 - 03:29 PM
Just put exhaust gas lead detection on an engine run from gek running on clean wood vs wood with lead paint.
My guess is you will find that the lead got disassembled just like the wood molecule did.
Next if the ash contains lead, a lead recycler (the dude with the smelter) may want the ash for free because they are equipped to do that type of work.
Posted 13 February 2013 - 10:17 PM
When burned in an engine, the form converted to lead oxide, which is quite stable, but too much of anything is bad, and the dust eventually became a small health problem, although the catalytic converter problem is really what ended its use.
Lead in paint is a different matter, in that it actually is the relatively inert lead oxide, but it was used as the white pigment in the base paint color, so rather large quantities are present. When the paint is intact, it is actually a non issue. When it flakes off, and small children eat those flakes, that is a real problem. If you have kids, you know that no matter if they are hungry or not, they put everything in their mouth. It is just human nature.
One way to strip it off of wood is the same way that trees are de barked. I would rather have a concentrated pile of paint shavings to dispose of than a lot of diluted out ashes to wonder about, but sometimes there is no choice.
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