Hydrocarbon fuel made from carbon di:oxide in combustion gases - via conversion to carbon mon:oxide and hydrogen using electrical heating

摘要

Hydrocarbons are made as follows from the combustion gases of fuels. (i) The gases are collected, and liq. CO2 sepd.; (ii) the CO2 is converted to CO by heating electrically to a temp. of 1600-2250 deg.C while selectively removing 02, e.g. through a heated zirconia wall; (iii) some CO is catalytically reacted with water at a temp. of 800-1000 K to give H2 (and CO2, which is recycled); and (iv) the remaining CO is catalytically reacted with the H2 to give paraffins. CO2 can be collected in the heating season, and converted to a fuel when electricity is cheap. Overall, energy cost is reduced. A country with uranium but little oil can recycle its hydrocarbon fuel using nuclear electricity. The hydrocarbon is made more cheaply than from CO2 and electrolytic H2.