[Gasification] water gas and IC Engine exhaust gas temperatures

[Jeff Davis]

Kevin wrote,
> No need to get headaches by reinventing the metallurgical wheel... Do a
> Google on "Pre-reduced Iron Ore Pellets", "Sponge Iron", etc.

A snip from wikipedia:

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Iron ore consists of oxygen and iron atoms bonded together into molecules.
To create pure iron, the ore must be smelted to remove the oxygen.
Oxygen-iron bonds are strong, and to remove the iron from the oxygen, a
stronger elemental bond must be presented to attach to the oxygen. Carbon
is used, because the strength of a carbon-oxygen bond is greater than that
of the iron-oxygen bond, at high temperatures. Thus, the iron ore must be
powdered and mixed with coke, to be burnt in the smelting process.

However, this is not entirely as simple as that; carbon monoxide is the
primary ingredient of chemically stripping oxygen from iron. Thus, the
iron and carbon smelting must be kept at an oxygen deficient reduced state
to promote burning of carbon to produce CO not CO2.

Air blast and charcoal (coke): 2C + O2  2CO.
Carbon monoxide (CO) is the principle reduction agent.
Stage One: 3Fe2 O3 + CO  2Fe3 O4 + CO2
Stage Two: Fe3 O4 + CO  3Fe O + CO2
Stage Three: FeO + CO  Fe + CO2
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Jeff





-- 
Jeff Davis

Some where 20 miles south of Lake Erie, USA