• Karl, J.; Karellas, S.: Highly Efficient SOFC Systems with Indirect Gasification. In: Proceedings of the 6th European Solid Oxide Fuel Cell Forum, 28June - 2July, 2004, Lucerne, Switzerland, Vol. 2, p. 534-545. June 2004
  • Arnstein Norheim, Johan E. Hustad, Jan Byrknes, Arild Vik: Comparison of performance data of a Solid Oxide Fuel Cell using biomass gasification gas and natural gas . In: Science in Thermal and Chemical Biomass Conversion, Vancouver Island, BC, Canada. August 2004
  • Karl, J: Biocellus - Highly efficient SOFC systems with indirect gasification. In: International workshop on "Bio-energy workshop EU-Russia". October 2004
  • Sotiris Karellas, Jürgen Karl, Nadine Frank: Highly effective combination of SOFC with biomass gasification (Poster). In: Second Annual Event of the European Hydrogen & Fuel Cell Technology Platform, Brussels. March 2005
  • J. Karl, S. Karellas, N. Frank, H. Spliethoff: Highly Efficient Conversion of Syngas from Biomass Gasification in Solid Oxide Fuel Cells. In: 14th European Conference and Technology Exhibition on Biomass for Energy, Industry and Climate Protection is Paris, 17th to 21st October 2005. October 2005
  • N. Frank, S. Karellas, J. Karl: Biocellus - Biomass Fuel Cell Utility System (Contract n° 502759). In: Brussels Workshop, December 2005. December 2005
  • J.P. Ouweltjes, P.V. Aravind, N. Woudstra and G. Rietveld: Biosyngas Utilization in Solid Oxide Fuel Cells with Ni/GDC Anodes. In: Proceedings of the First European Fuel Cell Technology and Applications Conference, Rome, 2005. December 2005
  • N. Frank, J. Karl: SOFC-Brennstoffzellen-Erfahrung mit biogenen Gasen . In: Tagung der Fördergesellschaft Erneuerbare Energien e.V.. May 2006
  • Mathilde Saule, Nadine Frank, Philipp Hofmann, Jan Pieter Ouweltjes, Andreas Schweiger, Jürgen Karl : Operation of Solid Oxide Fuel Cells with Syngas from Biomass. In: H2expo 2006, Hamburg. October 2006
  • MACEK, Jadran, NOVOSEL, Barbara, MARINŠEK, Marjan: Ni-YSZ SOFC anodes : minimization of carbon deposition. In: J. Eur. Ceram. Soc.. [Print ed.], 2007, vol. 27, no. 2/3, pp. 487-491, graf. prikazi. [COBISS.SI-ID 28414981]. February 2007
  • MARINŠEK, Marjan, PEJOVNIK, Stane, MACEK, Jadran: Modelling of electrical properties of Ni-YSZ composites. In: J. Eur. Ceram. Soc.. [Print ed.], 2007, vol. 27, no. 2/3, str. 959-964, graf. prikazi. [COBISS.SI-ID 28415237]. February 2007
  • RAZPOTNIK, Tanja, MACEK, Jadran: Synthesis of nickel oxide/zirconia powders via a modified Pechini method. In: J. Eur. Ceram. Soc.. [Print ed.], 2007, vol. 27, no. 2/3, str. 1405-1410, Graf. prikazi. [COBISS.SI-ID 28239109]. February 2007
  • Ph. Hofmann, A. Schweiger, L. Fryda, K.D. Panopoulos, U. Hohenwarter, J.D. Bentzen, J.P. Ouweltjes, J. Ahrenfeldt, U. Henriksen and E. Kakaras : High temperature electrolyte supported Ni-GDC/YSZ/LSM SOFC operation on two-stage Viking gasifier product gas. In: Journal of Power Sources, In Press, Corrected Proof, Available online 5 May 2007, doi:10.1016/j.jpowsour.2007.04.073.. May 2007
  • Ph. Hofmann, A. Schweiger, L. Fryda, K.D. Panopoulos, U. Hohenwarter, J.P. Ouweltjes, J. Karl, E. Kakaras: Results from Planar SOFCS Operated on Hot Cleaned Gas Derived from Two Experimental Gasification Facilities. In: 15th European Biomass Conference and Exhibition, 7-11 May, Berlin 2007. May 2007
  • N Frank. M Saule, J. Karl, A. Schweiger, U. Hohenwarter, P. Hoffmann, J. P. Ouweltjes, I. Waemhus: Results of the Biocellus Project: Gas Cleaning Technology. SOFC Operation on Wood Gas and Technical Implementation of the TopCycle. In: 15th European Biomass Conference & Exhibition ICC International Congress Center Berlin, Germany . May 2007
  • N. Frank, M Saule, J. Karl, A. Schweiger, U. Hohenwarter: Performance of Tubular SOFCs on Syngas from Wood Gasification. In: 15th European Biomass Conference & Exhibition ICC International Congress Center Berlin, Germany . May 2007
  • J Karl, M. Saule, U Hohenwarter, A. Schweiger: Benchmark Study of Power Cycles Integrating Biomass Gasifier and Solid Oxide Fuel Cell. In: 15th European Biomass Conference & Exhibition ICC International Congress Center Berlin, Germany . May 2007
  • N. Frank, M. Saule, J. Karl: Degradation of solid oxide fuel cells with wood . In: WHEC 16 – Lyon France. June 2007
  • Nadine Frank, Mathilde Saule, Sotirios Karellas, Jürgen Karl: Poster presentation: P1005-180: Degradation of Solid Oxide Fuel Cells with Wood Gases. In: Lucerne FUEL CELL FORUM 2006 (SOFC). July 2007
  • Marjan Marinšek, Jana Padežnik Gomilšek, Iztok Arcon, Miran Ceh, Alojz Kodre, Jadran Macek : Structure Development of NiO-YSZ Oxide Mixtures in Simulated Citrate-Nitrate Combustion Synthesis. In: Journal of the American Ceramic Society 90 (10), 3274–3281, 2007. October 2007
  • Mathilde Saule, Regina Deschermeier, Nadine Frank, Jürgen Karl : EFC2007-39064Carbon deposition during SOFC operation with biogenous gases. In: Proceedings of the Second European Fuel Cell Technology and Applications Conference, Rome. December 2007
  • DI Andreas Schweiger , Dr. DI Ulrich Hohenwarter, Dr. DI Jürgen Karl: Verstromung von Biomasse - Produktgasen in Solid Oxide Fuel Cells. In: 9.Symposium Energieinnovation - Institut für Elektrizitätswirtschaft und Energieinnovation, TU Graz. February 2006
  • A. Schweiger, U. Hohenwarter: SMALL SCALE HOT GAS CLEANING DEVICE FOR SOFC UTILISATION OF WOODY BIOMASS PRODUCT GAS. In: 15th European Biomass Conference & Exhibition ICC International Congress Center Berlin, Germany . May 2007
  • G. Bamberger, A. Schweiger, U. Hohenwarter: DESULFURIZATION OF HOT BIOMASS PRODUCT GAS WITH REGENERATIVE ADSORBENTS FOR SOFC. In: 15th European Biomass Conference & Exhibition ICC International Congress Center Berlin, Germany . May 2007
  • Andreas Schweiger, Mathilde Saule, Jürgen Karl: THERMODYNAMISCHE BEWERTUNG ZUR INTEGRATION EINER SOFC MIT HEIßGASREINIGUNG IN EIN BIOMASSE BASIERENDES VERGASUNGSSYSTEM. In: 10.Symposium Energieinnovation - Institut für Elektrizitätswirtschaft und Energieinnovation, TU Graz. February 2008
  • A. Schweiger, J.Karl: THERMODYNAMIC EVALUATION ON THE IMPACT OF A HOT GAS CLEANING SYSTEM FOR INTEGRATED GASIFICATION SYSTEMS. In: 16th European Biomass Conference & Exhibition, Convention and Exhibition Centre, Valencia, Spain. June 2008
  • Ph. Hofmann, K.D. Panopoulos, L.E. Fryda, A. Schweiger, J.P. Ouweltjes, J. Karl: Integrating biomass gasification with solid oxide fuel cells: Effect of real product gas tars, fluctuations and particulates on Ni-GDC anode.. In: International Journal of Hydrogen Energy (2008),doi:10.1016/j.ijhydene.2008.03.020.. January 2008
  • Ph. Hofmann, A. Schweiger, L. Fryda, K.D. Panopoulos, U. Hohenwarter, J.D. Bentzen, J.P. Ouweltjes, J. Ahrenfeldt, U. Henriksen, E. Kakaras: High temperature electrolyte supported Ni-GDC/YSZ/LSM SOFC operation on two-stage Viking gasifier product gas. In: Journal of Power Sources 173 (2007) 357–366.. May 2007
  • Ph. Hofmann, A. Schweiger, L. Fryda, K.D. Panopoulos, U. Hohenwarter, J.P. Ouweltjes, J. Karl, E. Kakaras: Results from planar SOFCs operated on hot cleaned gas derived from two experimental gasification facilities. In: Proceedings of the 15th European Biomass Conference & Exhibition , 7-11 May 2007, Berlin Germany. July 2008
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