Safety of Wood Gas [Gasification] storing wood gas.

[Harmon Seaver]

On 6/16/06, listserv.repp.org at jaredharvey.com
<listserv.repp.org at jaredharvey.com> wrote:
> Hello Harmon / all,
>
> JH> 1.  At room temp 20C or around 85F what pressure would you need to
> JH> liquefy wood gas?
>
> HS> I'm  not  sure  if  it is even possible to liquefy woodgas, but it
> HS> certainly  isn't  economically feasible. Seems like, IIRC, it just
> HS> can't be done.
>
> I know it can be done. Remember the ideal gas law states PV=nRT saying
> that  the  pressure will increase as the temperature increases. I just
> don't  know  what the R constant would be for different molecules like
> for  CO  and Methane I also don't know what the limits are for when it
> goes  through a phase change. At room temperature it is quite possible
> it  may  be  cryogenic temps, but I haven't found any hard evidence of
> this yet.

    I think Daniel answered this fairly well. And you are forgetting
the high H2 content.

  (snip)


>
> At  the  moment  I'd  tend to think that at pressures around 100PSI to
> 200PSI and room temperature you might be able to liquify methane.

    Not likely, or it would be common practice. People have been
driving vehicles powered by methane from digesters for decades now and
no one has ever found it feasible to liquify.

> I've
> also  got  a feeling that the molecular bonds for CO are weaker then a
> stable molecules like methane. Remember that methane is what it want's
> to  be,  where CO really wants to be CO2, so it would probably liquify
> before methane.
>
> On  a side note liquid N2 cost around $10/gallon. Liquefying gas might
> not be as expensive as you might think.
>
     $10/gallon prices it right out of the energy ballpark.


-- 
Harmon Seaver