Open-loop thermochemical cycles for the production of hydrogen

The concept of open-loop thermochemical cycles (cycles which have additional or other feedstocks than water and produce materials in addition to hydrogen and oxygen) is introduced. Preliminary analysis of possible feedstocks available indicates substantial quantities of hydrogen could possibly be produced through open-cycles. The advantages of open-cycles include the conversion of unwanted waste products to useful products while producing hydrogen. A compilation of open processes which would have SO₂ in addition to water as feedstock and which would produce sulfuric acid in addition to hydrogen and oxygen is given.