Re: n2o, ethane, co2 ethene mixtures

[Penguinista]

toby peers wrote:
> Sometimes people on this group have mentioned mixed liquid monprops
> like methane and oxygen and that they are very dangerous. What
> about non cryogenic equivalents like;
>
> n2o,co2
> n2o, ethane
> n2o, ethene
> n2o,co2,ethane
> n2o,co2,ethene
> co2,ethene (like the mars cars proposed by Zubrin)
>
> would any of these combinations mix and would they be equally
> dangerous as oxygen methane mixtures? (n2o is supposed to
> be fairly unreactive at low temperatures, not sure about ethene
> though!) has any work been done on this?
>
> Toby
>
>
CO2 is fairly inert unless you're using a high temperature fuel like
aluminum of magnesium. It would act as a dilutant, much like water,
reducing sensitivity and reactant energy.

N2O is not so great as a rocketry oxidizer, though it's usefull for models.

Any fuel oxidizer mix is potentially explosive, though sensitivity varies.

[Ian Stirling]

toby peers > wrote:
> Sometimes people on this group have mentioned mixed liquid monprops
> like methane and oxygen and that they are very dangerous. What
> about non cryogenic equivalents like;
>
> n2o,co2

That's not a monoprop, it's an monoprop and an inert(ish) gas.
Do you perhaps mean N2O/CO?

> n2o, ethane
> n2o, ethene
> n2o,co2,ethane
> n2o,co2,ethene
> co2,ethene (like the mars cars proposed by Zubrin)
>
> would any of these combinations mix and would they be equally
> dangerous as oxygen methane mixtures? (n2o is supposed to
> be fairly unreactive at low temperatures, not sure about ethene
> though!) has any work been done on this?


--
http://inquisitor.i.am/ | | Ian Stirling.
---------------------------+-------------------------+--------------------------
"The theory of everything falls out trivially." -- Etherman, sci.physics kook.

[Penguinista]

toby peers wrote:
>
> Your right, but I did mean co2 as I remember reading an article about
> experiments the surrey space centre carried out where they were using a
> catalyst to decompose n2o for monoprop and biprop apps. It seemed promising
> but the catalyst seemed to get cooked above 1200deg C (If I remember
> correctly). I thought diluting the n2o with co2 (same molecular mass similar
> vapor pressure, etc) would allow one to have a monoprop (poor performance
> admitedly) with a non-exotic catalyst. I wonder if n2o and co2 are miscible?
>
> kook.

I don't recall N2O being a high energy monoprop. If your intention is
to cool an overly hot mix and preserve catalyst, a low molecular weight
diatomic molecule will have less impact on exaust velocity.