Publikationen

Dutzi, J.; Boukis, N.; Sauer, J. (2024). Investigating Salt Precipitation in Continuous Supercritical Water Gasification of Biomass. Processes, 12 (5), Art.-Nr.: 935. doi:10.3390/pr12050935

Dutzi, J.; Boukis, N.; Sauer, J. (2024). Supercritical water gasification of heavy metal contaminated plants with focus on separation of heavy metal contaminants. Biomass and Bioenergy, 182, Article no: 107059. doi:10.1016/j.biombioe.2024.107059

Dutzi, J.; Stoll, I. K.; Boukis, N.; Sauer, J. (2024). Screening of ten different plants in the process of supercritical water gasification. Sustainable Chemistry for the Environment, 5, Art.-Nr.: 100062. doi:10.1016/j.scenv.2024.100062

Perret, L.; Boukis, N.; Sauer, J. (2024). Synthesis gas fermentation at high cell density: How pH and hydrogen partial pressure affect productivity and product ratio in continuous fermentation. Bioresource Technology, 391 (Part A), Art.-Nr.: 129894. doi:10.1016/j.biortech.2023.129894

Vadarlis, A. A.; Lacerda de Oliveira Campos, B.; Lemonidou, A. A.; Boukis, N.; Sauer, J. (2024). Supercritical Water Gasification of Ethanol as Biomass Model Compound in Tandem with Steam Reforming: Kinetic Modeling of the Reforming Step and Techno-Economic Analysis of the Integrated Concept. Industrial and Engineering Chemistry Research, 63 (39), 16683–16700. doi:10.1021/acs.iecr.4c01486

Vadarlis, A. A.; Neukum, D.; Lemonidou, A. A.; Boukis, N.; Sauer, J. (2024). Direct steam reforming of the product gas from ethanol gasification with supercritical water. International Journal of Hydrogen Energy, 49 (A), 992–1008. doi:10.1016/j.ijhydene.2023.08.108

Dutzi, J.; Boukis, N.; Sauer, J. (2023). Energetic Assessment of SCWG Experiments with Reed Canary Grass and Ethanol Solution on Laboratory and Pilot Scale. Energies, 16 (19), Article no: 6848. doi:10.3390/en16196848

Dutzi, J.; Boukis, N.; Sauer, J. (2023). Process Effluent Recycling in the Supercritical Water Gasification of Dry Biomass. Processes, 11 (3), Art.-Nr.: 797. doi:10.3390/pr11030797

Dutzi, J.; Vadarlis, A. A.; Boukis, N.; Sauer, J. (2023). Comparison of Experimental Results with Thermodynamic Equilibrium Simulations of Supercritical Water Gasification of Concentrated Ethanol Solutions with Focus on Water Splitting. Industrial & Engineering Chemistry Research, 62 (32), 12501–12512. doi:10.1021/acs.iecr.3c01595

Perret, L.; Boukis, N.; Sauer, J. (2023). Influence of Increased Cell Densities on Product Ratio and Productivity in Syngas Fermentation. Industrial & Engineering Chemistry Research, 62 (35), 13799–13810. doi:10.1021/acs.iecr.3c01911

Vadarlis, A. A.; Angeli, S. D.; Lemonidou, A. A.; Boukis, N.; Sauer, J. (2023). Catalytic Biomass Gasification in Supercritical Water and Product Gas Upgrading. ChemBioEng Reviews, 10 (4), 370–398. doi:10.1002/cben.202300007

Koutsonikolas, D.; Karagiannakis, G.; Plakas, K.; Chatzis, V.; Skevis, G.; Giudicianni, P.; Amato, D.; Sabia, P.; Boukis, N.; Stoll, K. (2022). Membrane and Electrochemical Based Technologies for the Decontamination of Exploitable Streams Produced by Thermochemical Processing of Contaminated Biomass. Energies, 15 (7), Art. Nr.: 2683. doi:10.3390/en15072683

Perret, L.; Boukis, N.; Sauer, J. (2022). Methods of reaction and reactor engineering to adjust product ratios and increase efficiency of syngas fermentation with Clostridium ljungdahlii. Chemie Ingenieur Technik, 94 (9), 1252. doi:10.1002/cite.202255034

Boukis, N.; Stoll, I. K. (2021). Gasification of biomass in supercritical water, challenges for the process design—lessons learned from the operation experience of the first dedicated pilot plant. Processes, 9 (3), 1–17. doi:10.3390/pr9030455

Stoll, I. K.; Boukis, N.; Sauer, J. (2020). Syngas Fermentation to Alcohols: Reactor Technology and Application Perspective. Chemie - Ingenieur - Technik, 92 (1-2), 125–136. doi:10.1002/cite.201900118

Damergi, E.; Madi, H.; Sharma, S.; Boukis, N.; Marechal, F.; Van Herle, J.; Ludwig, C. (2019). A combined hydrothermal gasification - solid oxide fuel cell system for sustainable production of algal biomass and energy. Algal Research, 41, Art. Nr.: 101552. doi:10.1016/j.algal.2019.101552

Stoll, I. K.; Boukis, N.; Neumann, A.; Ochsenreither, K.; Zevaco, T. A.; Sauer, J. (2019). The Complex Way to Sustainability: Petroleum-Based Processes versus Biosynthetic Pathways in the Formation of C4 Chemicals from Syngas. Industrial & engineering chemistry research, 58 (35), 15863–15871. doi:10.1021/acs.iecr.9b01123

Stoll, I. K.; Boukis, N.; Sauer, J. (2019). Syngas fermentation at elevated pressure – experimental results. 27th European Biomass Conference and Exhibition, EUBCE 2019; Lisbon; Portugal; 27 May 2019 through 30 May 2019, 1255–1261, ETA-Florence Renewable Energies.

Stoll, I. K.; Boukis, N.; Sauer, J. (2019). Syngas fermentation at elevated pressure - experimental results. Proceedings of the 27th European Biomass Conference and Exhibition, 1255–1261. doi:10.5071/27thEUBCE2019-3CV.3.4

Oswald, F.; Stoll, I. K.; Zwick, M.; Herbig, S.; Sauer, J.; Boukis, N.; Neumann, A. (2018). Formic Acid Formation by at Elevated Pressures of Carbon Dioxide and Hydrogen. Frontiers in Bioengineering and Biotechnology, 6, Art.Nr. 6. doi:10.3389/fbioe.2018.00006

Stoll, K. I.; Herbig, S.; Zwick, M.; Boukis, N.; Sauer, J.; Neumann, A.; Oswald, F. (2018). Fermentation of H₂ and CO₂ with Clostridium ljungdahlii at Elevated Process Pressure – First Experimental Results. Chemical engineering transactions, 64, 151–156. doi:10.3303/CET1864026

Boukis, N.; Hauer, E.; Herbig, S.; Sauer, J.; Vogel, F. (2017). Catalytic gasification of digestate sludge in supercritical water on the pilot plant scale. Biomass Conversion and Biorefinery, 7 (4), 415–424. doi:10.1007/s13399-017-0238-x

Boukis, N.; Stoll, I. K.; Sauer, J.; Fischer, J.; Kansy, R. (2017). Separation of salts during the gasification of spent grain in supercritical water. 25th European Biomass Conference and Exhibition, Stockholm, Sweden, 12.-15. June 2017, 338–343, Stockholm.

Elsayed, S.; Boukis, N.; Patzelt, D.; Hindersin, S.; Kerner, M.; Sauer, J. (2016). Gasification of Microalgae Using Supercritical Water and the Potential of Effluent Recycling. Chemical Engineering and Technology, 39 (2), 335–342. doi:10.1002/ceat.201500146

Boukis, N.; Herbig, S.; Hauer, E.; Sauer, J.; Vogel, F. (2016). Catalytic gasification of digestate sludge in supercritical water : Experimental results on the pilot plant scale. 24th European Biomass Conference and Exhibition (EUBCE 2016), Amsterdam, Netherlands, 6th - 9th June 2016, 1062–1066, ETA.

Hammerschmidt, A.; Boukis, N.; Galla, U.; Zevaco, T.; DInjus, E.; Hitzmann, B. (2015). Influence of the heating rate and the potassium concentration of the feed solution on the hydrothermal liquefactioin of used yeast and apple pomace under reducing conditions. Biomass Conversion and Biorefinery, 5 (2), 125–139. doi:10.1007/s13399-014-0148-0

Möbius, A.; Boukis, N.; Hindersin, S.; Kerner, M. (2015). Cultivation and hydrothermal gasification of microalgae scenedesmus obliquus-first experimental results. Chemie - Ingenieur - Technik, 87 (12), 1720–1725. doi:10.1002/cite.201500002

Patzelt, D.; Hindersin, S.; Elsayed, S.; Boukis, N.; Kerner, M.; Hanelt, D. (2015). Microalgal growth and fatty acid productivity on recovered nutrients from hydrothermal gasification of Acutodesmus obliquus. Algal Research, 10, 164–171. doi:10.1016/j.algal.2015.05.002

Patzelt, D. J.; Hindersin, S.; Elsayed, S.; Boukis, N.; Kerner, M.; Hanelt, D. (2015). Hydrothermal gasification of Acutodesmus obliquus for renewable energy production and nutrient recycling of microalgal mass cultures. Journal of applied phycology, 27 (6), 2239–2250. doi:10.1007/s10811-014-0496-y

Boukis, N.; Korving, L.; Hauer, E.; Herbig, S.; Sauer, J. (2015). Gasification of sewage sluge in supercritical water, experimental results from the gasification of Dutch sewage sludge. 23rd European Biomass Conference and Exhibition, Vienna, Austria, 1-4 June 2015, 83–87, Vienna. doi:10.5071/23rdEUBCE2015-1CO.5.2

Elsayed, S.; Boukis, N.; Sauer, J. (2014). Hydrothermal Gasification of Microalgae – Prospects and Challenges. DGMK-Fachbereichstagung "Konversion von Biomassen", Rotenburg a.d. Fulda, 12. - 14. Mai 2014, 221–228, Dt. Wiss. Ges. für Erdöl.

Möbius, A.; Boukis, N.; Sauer, J. (2013). Gasification of biomass in supercritical water (SCWG). Mendez-Vilas, A. [Hrsg.] Materials and Processes for Energy : Communicating Current Research and Technological Developments Badajoz : Formatex Research Center, 2013 (Energy Book Series ; # 1), 264–268.

Boukis, N.; Hauer, E.; Habicht, W.; Dinjus, E. (2013). Corrosion behaviour of Ni-base alloys in supercritical water containing alkali chlorides. For a blue sky : EUROCORR 2013, European Corrosion Congress, the annual event of the European Federation of Corrosion, Estoril, Portugal, 1 - 5 September, 7 S., Estoril.

Möbius, A.; Boukis, N.; Galla, U.; Dinjus, E. (2012). Gasification of pyroligneous acid in supercritical water. Fuel, 94, 395–400. doi:10.1016/j.fuel.2011.11.023

Möbius, A.; Ostmann, B.; Boukis, N.; Fischer, J. (2012). Gasification of spent grains in supercritical water – experimental results. 20th European Biomass Conference and Exibition, Milan, Italy, 18-22 June 2012, 1086–1088.

Habicht, W.; Boukis, N.; Hauer, E.; Dinjus, E. (2011). Analysis of hydrothermally formed corrosion layers in Ni-base alloy 625 by combined FE-SEM and EDXS. X-Ray Spectrometry, 40, 69–73. doi:10.1002/xrs.1297

Hammerschmidt, A.; Boukis, N.; Hauer, E.; Galla, U.; Dinjus, E.; Hitzmann, B.; Larsen, T.; Nygaard, S. D. (2011). Catalytic conversion of waste biomass by hydrothermal treatment. Fuel, 90, 555–562. doi:10.1016/j.fuel.2010.10.007

Hammerschmidt, A.; Boukis, N.; Galla, U.; Dinjus, E.; Hitzmann, B. (2011). Conversion of yeast by hydrothermal treatment under reducing conditions. Fuel, 90 (11), 3424–3432. doi:10.1016/j.fuel.2011.06.052

Madenoglu, T. G.; Boukis, N.; Saglam, M.; Yüksel, M. (2011). Supercritical water gasification of real biomass feedstocks in continuous flow system. International Journal of Hydrogen Energy, 36, 14408–14415. doi:10.1016/j.ijhydene.2011.08.047

Boukis, N.; Hauer, E.; Habicht, W.; Dinjus, E. (2011). Corrosion behavior of stainless steels in pressurized hot water containing chloride and sulphate anions. Papier EUROCORR 2011, Stockholm, Sweden, 4 - 8 September 2011, 6 S.

Kick, T.; Herzler, J.; Braun-Unkhoff, M.; Naumann, C.; Aigner, M.; Boukis, N.; Galla, U.; Dinjus, E. (2008). Investigations of the combustion properties of the product gas gained from the gasification of wet biomass in supercritical water. 16th European Biomass Conf.and Exhibition : From Research to Industry and Markets, Valencia, E, June 2-6, 2008. Proceedings on DVD, 699–704, ETA-Florence Renewable Energies.

Boukis, N.; Diem, V.; Galla, U.; Dinjus, E. (2006). Methanol reforming in supercritical water for hydrogen production. Combustion Science and Technology, 178, 467–85. doi:10.1080/00102200500292316

D’Jesús, P.; Boukis, N.; Kraushaar-Czarnetzki, B.; Dinjus, E. (2006). Influence of Process Variables on Gasification of Corn Silage in Supercritical Water. Industrial & engineering chemistry research, 45 (5), 1622–1630. doi:10.1021/ie050367i

D’Jesús, P.; Boukis, N.; Kraushaar-Czarnetzki, B.; Dinjus, E. (2006). Gasification of corn and clover grass in supercritical water. Fuel, 85 (7-8), 1032–1038. doi:10.1016/j.fuel.2005.10.022

Habicht, W.; Boukis, N.; Franz, G.; Walter, O.; Dinjus, E. (2006). Exploring hydrothermally grown potassium titanate fibers by STEM-in-SEM/EDX and XRD. Microscopy and Microanalysis, 12, 322–26. doi:10.1017/S1431927606060429

Boukis, N.; Diem, V.; Galla, U.; D’Jesus, P.; Kruse, A.; Müller, H.; Dinjus, E. (2005). Wasserstofferzeugung aus Biomasse. Nachrichten - Forschungszentrum Karlsruhe, 37, 116–23.

D’Jesus, P.; Artiel, C.; Boukis, N.; Kraushaar-Czarnetzki, B.; Dinjus, E. (2005). Influence of educt preparation on gasification of corn silage in supercritical water. Industrial and engineering chemistry research, 44 (24), 9071–9077. doi:10.1021/ie0508637

Boukis, N.; Kruse, A.; Galla, U.; Diem, V.; Dinjus, E. (2004). Biomassevergasung in überkritischem Wasser. e.l.b.w. Umwelttechnik, Juli, 3, 42–43.

Habicht, W.; Boukis, N.; Franz, G.; Dinjus, E. (2004). Investigation of nickel-based alloys exposed to supercritical water environments. Microchimica Acta, 8th European Workshop on Modern Developments and Applications in Microbeam Analysis (EMAS 2003), Chiclana de la Frontera, E, May 18-22, 2003, 145, 57–62. doi:10.1007/s00604-003-0127-9

Boukis, N.; Galla, U.; Diem, V.; D’Jesus, P.; Dinjus, E. (2004). Hydrogen production from biomass in supercritical water. Pierucci, S. [Hrsg.] H₂-Age : When, Where, Why, Pisa, I, May 16-19, 2004 Milano : Italian Association of Chemical Engineering, 2004 (Chemical Engineering Transactions ; 4), 131–36.

Diem, V.; Boukis, N.; Hauer, E.; Dinjus, E. (2004). Hydrothermal reforming of alcohols and bio crude oil. Pierucci, S. [Hrsg.] H₂-Age : When, Where, Why, Pisa, I, May 16-19, 2004 Milano : Italian Association of Chemical Engineering, 2004 (Chemical Engineering Transactions ; 4), 99–104.

Boukis, N.; Diem, V.; Habicht, W.; Dinjus, E. (2003). Methanol reforming in supercritical water. Industrial and Engineering Chemistry Research, 42, 728–35. doi:10.1021/ie020557i

Boukis, N.; Habicht, W.; Franz, G.; Dinjus, E. (2003). Behavior of Ni-base alloy 625 in methanol-supercritical water systems. Materials and Corrosion, 54, 326–330.

Boukis, N.; Kruse, A.; Galla, U.; Diem, V.; Dinjus, E. (2003). Biomassevergasung in überkritischem Wasser. Nachrichten - Forschungszentrum Karlsruhe, 35, 99–104.

Boukis, N.; Schacht, M.; Dinjus, E. (2001). Werkstoffkorrosion in überkritischen wässrigen Lösungen. Nachrichten - Forschungszentrum Karlsruhe, 33, 81–90.

Habicht, W.; Behrens, S.; Boukis, N.; Dinjus, E. (2001). Scanning transmission type imaging and analysis (EDX) of protein supported metallic nanoparticles. Imaging and Microscopy, Special Issue of G.I.T. Laboratory Journal (2001), 42–44.

Schacht, M.; Boukis, N.; Dinjus, E. (2001). Corrosion of alumina ceramics in acidic aqueous solutions at high temperatures and pressures. Journal of Materials Science, (2000), 35, 6251–58.

Kritzer, P.; Boukis, N.; Dinjus, E. (2000). Review of the corrosion of nickel-based alloys and stainless steels in strongly oxidizing pressurized high-temperature solutions at subcritical and supercritical temperatures. Corrosion, 56, 1093–1104.

Kritzer, P.; Boukis, N.; Dinjus, E. (2000). Transpassive dissolution of alloy 625, chromium, nickel, and molybdenum in high-temperature solutions containing hydrochloric acid and oxygen. Corrosion, 56, 265–72.

Boukis, N.; Friedrich, C.; Dinjus, E. (1999). Corrosion of titanium under SCWO-conditions. Recent results. Dahmen, N.; Dinjus, E. [Hrsg.] High Pressure Chemical Engineering : Proc.of the Internat.Meeting of the GVC-Fachausschuß ’Hochdruckverfahrenstechnik’, Karlsruhe, March 3-5, 1999 Wissenschaftliche Berichte, FZKA-6271 (Juni 99), 101–02.

Friedrich, C.; Kritzer, P.; Boukis, N.; Franz, G.; Dinjus, E. (1999). The corrosion of tantalum in oxidizing sub- and supercritical aqueous solutions of HCl, H₂SO₄ and H₃PO₄. Journal of Materials Science, 34, 3137–41.

Kritzer, P.; Boukis, N.; Dinjus, E. (1999). The corrosion of nickel-base alloy 625 in sub- and supercritical aqueous solutions of oxygen: A long time study. Journal of Materials Science Letters, 18, 1845–47.

Kritzer, P.; Boukis, N.; Dinjus, E. (1999). Factors controlling corrosion in high-temperature aqueous solutions: a contribution to the dissociation and solubility data influencing corrosion processes. Journal of Supercritical Fluids, 15, 205–27.

Kritzer, P.; Boukis, N.; Dinjus, E. (1999). The corrosion of nickel-base alloy 625 in sub- and supercritical aqueous solutions of HNO₃ in the presence of oxygen. Journal of Materials Science Letters, 18, 771–73.

Kritzer, P.; Boukis, N.; Dinjus, E. (1999). The corrosion of alloy 625 (NiCr22Mo9Nb; 2.4856) in high-temperature, high-pressure aqueous solutions of phosphoric acid and oxygen. Corrosion at sub- and supercritical temperatures. Materials and Corrosion, (1998), 49, 831–39.

Kritzer, P.; Boukis, N.; Franz, G.; Dinjus, E. (1999). The corrosion of niobium in oxidizing sub- and supercritical aqueous solutions of HCl and H₂SO₄. Journal of Materials Science Letters, 18, 25–28.

Schacht, M.; Boukis, N.; Dinjus, E.; Ebert, K.; Janssen, R.; Meschke, F.; Claussen, N. (1999). Corrosion of zirconia ceramics in acidic solutions at high pressures and temperatures. Journal of the European Ceramic Society, (1998), 18, 2373–76.

Kritzer, P.; Boukis, N.; Dinjus, E. (1998). Corrosion of alloy 625 in high-temperature, high pressure sulfate solutions. Corrosion, 54, 689–99.

Kritzer, P.; Boukis, N.; Dinjus, E. (1998). Corrosion of alloy 625 in aqueous solutions containing chloride and oxygen. Corrosion, 54, 824–34.

Kritzer, P.; Boukis, N.; Dinjus, E. (1998). Über die transpassive Auflösung von Nickel-Basis-Legierungen und Edelstählen in sauerstoff- und chloridhaltigem Hochtemperatur-Wasser. Materials and Corrosion, (1997), 48, 799–805.

Boukis, N.; Friedrich, C.; Dinjus, E. (1998). Titanium as reactor material for SCWO applications. First experimental results. CORROSION ’98 - Annual Conf.and Exposition, San Diego, Calif., March 22-27, 1998 Paper No.417 Houston : NACE, 1998.

Boukis, N.; Kritzer, P.; Dinjus, E. (1998). Corrosion phenomena of alloy 625 in aqueous solutions containing sulfuric acid and oxygen under subcritical and supercritical conditions. CORROSION ’98 - Annual Conf.and Exposition, San Diego, Calif., March 22-27, 1998 Paper No.415 Houston : NACE, 1998.

Boukis, N.; Claussen, N.; Ebert, K.; Janssen, R.; Schacht, M. (1997). Corrosion screening tests of high-performance ceramics in supercritical water containing oxygen and hydrochloric acid. Journal of the European Ceramic Society, 17, 71–76.

Boukis, N.; Friedrich, C.; Habicht, W.; Schacht, M.; Dinjus, E. (1997). Corrosion screening tests in supercritical water containing hydrochloric acid and oxygen. European Federation of Corrosion Congress (EUROCORR ’97), Trondheim, N, September 22-25, 1997 Proc. Vol. 1, 617–22.

Boukis, N.; Kritzer, P. (1997). Corrosion phenomena on alloy 625 in aqueous solutions containing hydrochloric acid and oxygen under subcritical and supercritical conditions. CORROSION ’97 - Annual Conf.and Exposition, New Orleans, La., March 9-14, 1997 Paper No.10 Houston : NACE, 1997.

Kritzer, P.; Boukis, N.; Dinjus, E. (1997). Change of corrosion phenomena in sub- and supercritical water. European Federation of Corrosion Congress (EUROCORR ’97), Trondheim, N, September 22-25, 1997 Proc. Vol. 2, 229–34.

Schacht, M.; Boukis, N.; Claussen, N.; Dinjus, E.; Ebert, K.; Janssen, R.; Meschke, F. (1997). Reactor for investigations of the corrosion of ceramics in HCl containing SCWO environments and first experimental results. 4th Internat.Symp.on Supercritical Fluids, Sendai, J, May 11-14, 1997 Proc., 147–50.

Schacht, M.; Boukis, N.; Dinjus, E.; Ebert, K.; Janssen, R.; Meschke, F.; Claussen, N. (1997). Corrosion of zirconia ceramics in acidic solutions at high pressures and temperatures. Abelard, P. [Hrsg.] Euro Ceramics : 5 ; Extended Abstracts of the 5th Conf.and Exhibition of the European Ceramic Society, Versailles, F, June 22-26, 1997 Zürich-Ütikon [u.a.] : Trans Tech Publ., 1997 (Key Engineering Materials ; 132-136), 1677–82.