[ExI] Cost of synfuel was Air-powered cars

[hkhenson]

At 05:21 PM 6/6/2008, you wrote:
>
>
> > -----Original Message-----
> > From: extropy-chat-bounces at lists.extropy.org
> > [mailto:extropy-chat-bounces at lists.extropy.org] On Behalf Of hkhenson
> > Sent: Friday, June 06, 2008 1:37 PM
> > To: ExI chat list
> > Subject: [ExI] Cost of synfuel was Air-powered cars
> >
>...
> > ...$0.01/kWh.  Figuring gasoline as pentane,
> >
> > 5CO2 + 16H2 --> C5H12 + 10H2O
> > 5x44   + 16x2      5x12+12  10x(2+16)
> > 220         32         72          180
> > 252                      252
> >
> > ...On the other hand, I
> > don't know how many of the list readers actually know
> > chemistry.  Those who do, please check my numbers. Keith
>
>Keith, why pentane for these calcs instead of octane?  Pentane is liquid at
>room temp but just barely.

Real gasoline is a witch's brew of stuff.  All the chemicals listed 
here http://en.wikipedia.org/wiki/Octane_rating plus a bunch.  Could 
have used most any hydrocarbon.  In the wintertime gasoline for the 
northern states can be as much as 40% butane.

>I agree the reactions you call out above do
>balance.
>
>When I have some time to look at it, I want to consider the total energy
>balance in:
>
>  8CO2 + 25H2 --> C8H18 + 16H2O
>
>since octane is something we already have the infrastructure to handle.  Not
>now tho, I'm preparing to do some recreational:
>
>2C8H18 + 25O2 + $$ --> 16CO2 +  18H2O + {8^]

Take plenty of money when go.

keith