CO2-CO-H2-CH4-CH2 edited

 CO2-CO-H2-CH4-CH2 edited 

Author: David Judbarovski, systems engineering, principle inventor, retired.

judbarovski.blogspot.com, davidjud.blogspot.com,

1939dmj@gmail.com. judbarovski@gmail.com .

 

Abstract idealized.

(a) CO2 splitting = CO – 283 KJ, here CO2 cycled, CO = 286,000 * 0.004 /3.6/28 = USD 11.35/ton CO.

(b) CO + H2O = CO2 + H2 – 3 KJ, negligible, so H2 = 11.35 * 28 / 2 = USD 160 /ton H2.

(c) CO2 from the air + 3 H2 (+H2 from CH4 = CH2 + H2) = CH4 + 2 H2O + 254 KJ, so  CH4 = (44 * 1144 kwh/ton CO2 * 0.004 + 6 * 160) /16 = USD 72.5 /ton CH4.

Minus heat in electricity (254,000 /3.6/16) * 0.25 energy efficiency * USD 0.05/kwh local tariff = USD 55 /ton CH4 sold electricity, so CH4 = 72.5 – 55 = USD 17.5/ton CH4.

CH2 = 17.5 * 16 / 14 = USD 20.0/ ton CH2 = USD 2.85/bbl.

if more realistic for idealized + 100%

CO = USD 22.7/ton,  H2 = USD 320, CH4 = (44 * 1.144 * 4 + 6 * 320) /16 = USD (132 – 55) /ton CH2 = USD 77 /ton = USD 11.0 /bbl. CH4 = 77 * 16 / 14 = 88 = USD 62 /1000 m3.

 Such fuels are carbon-neutral.

 

References

C Such fuels are carbon-neutral.

 

References