Burning plastics: a combustion if not clean?

Discussion of methods of remediation and control air quality.
the middle
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by the middle » 15/09/08, 19:50

:? making PE has been my job for 8 years.
Yes ... I was also told; it doesn't pollute when it burns.
What I also know is that to make PE, you need catalyst.
The most common is chrome ...
: Shock: : Cheesy: yum yum
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by Christophe » 15/09/08, 19:53

Ah well here it is specified!

But a catalyst is not necessarily present in the finished product ...
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by Gregconstruct » 15/09/08, 20:04

Christophe wrote:Ah well here it is specified!

But a catalyst is not necessarily present in the finished product ...


I think there is still some residue left!
Now, how much ...
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by the middle » 15/09/08, 20:06

Christophe wrote:Ah well here it is specified!

But a catalyst is not necessarily present in the finished product ...

Ha yes, it stays inside; that's for sure ... but I don't know if it changes during the reaction ...
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by Gregconstruct » 15/09/08, 20:09

lejustemilieu wrote:
Christophe wrote:Ah well here it is specified!

But a catalyst is not necessarily present in the finished product ...

Ha yes, it stays inside; that's for sure ... but I don't know if it changes during the reaction ...


My chemistry lessons are far away but I don't believe that a catalyst is transformed. Otherwise, we would not get the same finished products.
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by delnoram » 15/09/08, 20:55

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by chatelot16 » 15/09/08, 22:26

there is no chromium in polyethylene: if the catalyst was lost in polyethylene its cost would be expensive!

rather look for chromium in cement or in lime or in other ores: there is often a lot in cement ...

burning a bag in pe does not smell much because it burns well: burning a large mass of pe smells like a candle, because often the pe melts and spreads around the fires without burning

it's the paraffin that smells like a candle: PE is a polyolefin: basically paraffin a little better polymerized: it's the same family

polyethylene can burn as cleanly as fuel or other fuels: but like other fuels if you burn it badly it makes more or less good unburnt

the pet also burns well

the only one never to burn anyway is pvc it makes at least hydrochloric acid and dioxins ...

if you have clean and unmixed plastic it is better to recycle it, but if it is dirty it has no value and it is better to burn it to heat and save another fuel, and also save transport and unprofitable recycling

one day it will be necessary to make good heating boilers that can burn waste properly, so recycling is worth nothing
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by the middle » 16/09/08, 07:19

No chromium in the PE? : Shock:
The discovery of PE-HD in the form of a linear polyethylene, called PE-L, dates from the 50s and is due to four teams belonging to three different laboratories. In 1945 Bailey and Reid of the Phillips Petroleum Company use catalyst based nickel oxide and chromium oxide to synthesize PE-L. In 1950, Zletz of Standard Oil of Indiana developed a molybdenum oxide catalyst. In 1951, Hogan and Banks of the Phillips Petroleum Company improved the existing process by using chromium oxide and aluminum oxide. Finally in 1953, Karl Ziegler (Nobel Prize in 1963 with Giulio Natta), at the Max Planck Institute, developed a low pressure process using a catalyst belonging to the family of so-called Ziegler-Natta catalysts

This product is so great that my colleagues put a disposable overalls, gloves, mask, and shower after using the activated chromium catalyst. I know two kinds of catalysts, those which are lost (in the form of powder), and those which regenerate it (they are in the form of granules).
In the case of PE, the catata is in powder form, and LOST.
It is true that relatively few are needed; but if we burn the PE in an industrial way, I would not like to be in the place of the residents.
There are other processes that use other shit, in this case, we can say yes, there is no chromium : Cheesy: (read the link proposed two answers before.)
Okay, I hope my explanation is sufficient.
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by the middle » 16/09/08, 19:40

:? It is not forbidden to apologize ....
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by Gregconstruct » 16/09/08, 19:51

lejustemilieu wrote::? It is not forbidden to apologize ....


Apologize about what?
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