(19)

(11)

EP 2 173 839 A2

(12)

(88) Date of publication A3: 07.05.2009 (43) Date of publication: 14.04.2010 Bulletin 2010/15 (21) Application number: 08826603.6 (22) Date of filing: 27.06.2008

(51) International Patent Classification (IPC):  C10L 1/16(2006.01) (86) International application number: PCT/US2008/068622 (87) International publication number: WO 2009/014859 (29.01.2009 Gazette 2009/05)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MT NL NO PL PT RO SE SI SK TR Designated Extension States: AL BA MK RS (30) Priority: 29.06.2007 US 947126 P (71) Applicant: Energy & Environmental Research Center Foundation Grand Forks, ND 58202-9018 (US)	(72) Inventors: AULICH, Ted, R. Grand Forks, North Dakota 58201 (US) TIMPE, Ron,C. Grand Forks, North Dakota 58203 (US) WOCKEN, Chad, A. Grand Forks, North Dakota 58201 (US) HEIDE, Carsten Grand Forks, North Dakota 58201 (US) (74) Representative: Whitfield, Gillian Janette  Astrum-IP Limited 35 Stow Park Circle Newport South Wales NP20 4HF Newport South Wales NP20 4HF (GB)