[Gamel]

Hello
This is quite basic but I'm not an expert in chemistry...
2NO +O2 -> 2NO2
I need to slow down this reaction as much as possible, but the concentration of NO and O2 is fixed, and so is temperature and pressure. I can't add other chemicals...
Is there anything else that can be done e.g. applying electric voltage, magnetic fields, use the force...?
Thanks!

[Hunter2]

What is the purpose  to do so.
I think you can only decrease pressure or rise temperature.
Also removing oxygen will shift to NO.

[Gamel]

I can't change pressure or composition. I have only physical means.
I can play with the container where the gas is in. Modify its material.

[Borek]

Can't think of anything that can be done.

Reaction speed basically depends of concentrations (or pressure) and temperature - if you keep these constant, reaction speed doesn't change.

You can speed up the reaction with catalyst or slow it down with an inhibitor - but that requires adding something to the mix (changing container material won't change much, as this particular reaction takes place in the bulk).

Sometimes it is possible to speed up the reaction with ionizing radiation (UV and dental cement for example), but that's opposite of what you need.

[marquis]

Try contacting Elutia.  They make a TEA (Thermal Energy Analyzer) instrument. We used it to test for n- nitrosamines.  It first came out under Thermo, but I think Ellutia bought it from them.  The idea of the analyzer was to take the substances routed from a GC, pyrolyze them as they came out, then they were run through a could trap ( ours used EtOH and dry ice) and the left over gas went to the instrument.  The Instrument took the gasses (NOx) and reacted it with O3( O2 came in and was exposed to an electric arc to make ozone).  This chemoluminesced to produce red light which was measured.  There were other steps, but you get the.idea.  They might be able to help you.

[Borek]

Try contacting Elutia.  They make a TEA (Thermal Energy Analyzer) instrument. We used it to test for n- nitrosamines.  It first came out under Thermo, but I think Ellutia bought it from them.  The idea of the analyzer was to take the substances routed from a GC, pyrolyze them as they came out, then they were run through a could trap ( ours used EtOH and dry ice) and the left over gas went to the instrument.  The Instrument took the gasses (NOx) and reacted it with O3( O2 came in and was exposed to an electric arc to make ozone).  This chemoluminesced to produce red light which was measured.  There were other steps, but you get the.idea.  They might be able to help you.

Are you sure it is related to the OP question?