Several utilizationways of coke-oven gas, such as its usage as fuel, material in the production of chemicalproduct, hydrogen generationand the directreduced iron, were summarized.
This liberates hydrogen ions for the acidity, turns insoluble sulfide into very soluble sulfate, and creates rust from reducediron, a fascinating, if annoying, chemical process.
Household waste, for example, would be reduced to pure carbon, oxygen and hydrogen, along with a handful of heavier elements (tungsten, iron, aluminium and so on) which could then be re-used.