Combustion and pyrolysis of sulfides and organosulfurs

Last week there was a huge fire in french chemical factory Lubrizol, we now know the main products that burnt, to simplify the discussion I extracted a few compounds: 


* [isobutyl and isobutene polysulfide](https://patents.google.com/patent/US4839069) 500 tons,
* [dithiophosphoric acid and corresponding zinc salt](https://en.wikipedia.org/wiki/Zinc_dithiophosphate) (R = isopropyl) 200 tons,
* various hydrocarbons (mainly mineral oil) 2000 tons
* as well as calcium sulfonate and calcium salt of methylphenol sulfide (100 tons), amides/esters of phosphoric acid, polymers, aromatic amines & alcohols, various reaction products of $\ce{P2S5}$ with isopropanol 400 tons



> 
> What kind of sulfur compounds should we expect to be emitted from pyrolysis and combustion of such organosulfur compounds?
> 
> 
> 


Note the authorities claim the smoke analysis didn't show any $\ce{H2S}$ and that the $\ce{SO2}$ level wasn't higher than everyday measurements in cities.


There is a paper on [the pyrolysis of polyethylenesulfide](https://pubs.acs.org/doi/abs/10.1021/ma0116250) showing cyclization leads to a bunch of products, I wonder if it is applicable here (also I would like to know why no $\ce{H2S}$ is formed?)


[![enter image description here](https://i.stack.imgur.com/jIYeR.png)](https://i.stack.imgur.com/jIYeR.png)




I'd expect $\ce{H2O, CO, CO2}$, and $\ce{SO2}$ to be created during the combustion of these compounds. I'd wager a decent amount of $\ce{SO2}$ was created, but was diluted in the atmosphere.


Regarding $\ce{H2S}$, maybe it was produced, but then reacted according to the following:


$$\ce{H2S + O2 -> SO2 + H2O}$$


Additionally, there were probably a wide variety of odd sulfur compounds, but their existence was transient as they reacted to form $\ce{SO2}$ for instance. Furthermore, the authorities may not even be looking for these more complex molecules.


 1