Publication Date:
2012-03-10
Description:
Outotec open cycle (OOC) is a new low-energy process linking together production of hydrogen and sulfuric acid. While sulfuric acid is the world’s most widely produced chemical by mass at approximately 200 Mt/a, the OOC gives the potential for making 4 Mt/a of hydrogen gas as a by-product. H 2 SO 4 manufacture requires a source of sulfur dioxide. 30% of world production of H 2 SO 4 is from the SO 2 by-product of pyrometallurgical processing of sulfur containing concentrates of metals such as copper, nickel and zinc. SO 2 can also be made by direct combustion of sulfur. In OOC, a divided electrochemical cell is used for SO 2 -depolarized electrolysis of water. SO 2 is fed to the anolyte and converted to H 2 SO 4 , while hydrogen gas is produced at the cathode. On the industrial scale, the equipment will be in the form of a membrane electrolyzer assembly or stack. A case is described where the OOC would be connected to a pyrometallurgical plant smelting 1 Mt/a of nickel and copper concentrate, producing 1 Mt/a of H 2 SO 4 and 20 kt/a of hydrogen. Content Type Journal Article Pages 1-12 DOI 10.1007/s10668-012-9342-z Authors Anu Lokkiluoto, Aalto University School of Chemical Technology, Vuorimiehentie 2, Espoo, PO Box 16200, 00076 Aalto, Finland Pekka A. Taskinen, Aalto University School of Chemical Technology, Vuorimiehentie 2, Espoo, PO Box 16200, 00076 Aalto, Finland Michael Gasik, Aalto University School of Chemical Technology, Vuorimiehentie 2, Espoo, PO Box 16200, 00076 Aalto, Finland Ilkka V. Kojo, Outotec Oyj, Riihitontuntie 7 D, PO Box 86, 02200 Espoo, Finland Heljä Peltola, Outotec (Finland Oy) Research Center, Kuparitie 10, PO Box 69, 28101 Pori, Finland Michael H. Barker, Outotec (Finland Oy) Research Center, Kuparitie 10, PO Box 69, 28101 Pori, Finland Karl-Heinz Kleifges, Outotec (Oberursel), Ludwig-Erhard-Strasse 21, 61440 Oberursel, Germany Journal Environment, Development and Sustainability Online ISSN 1573-2975 Print ISSN 1387-585X
Print ISSN:
1387-585X
Electronic ISSN:
1573-2975
Topics:
Energy, Environment Protection, Nuclear Power Engineering
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Sociology
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