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LEAT Staff

Dipl.-Phys. Dr.-Ing. Martin Schiemann
Department of Energy Plant Technology
Ruhr-Universität Bochum
Universitätsstraße 150, IC 2/121
D-44780 Bochum
Germany
Phone: +49 (0)234 / 32-27362
E-Mail: schiemann(at)leat.rub.de


Fields of activity:

Optical measurement

Characterization of the ignition behavior of solid fuels

Spray rosting reactors in the steel industry

CFD-simulation


Publications
Gronarz T.; Schiemann, M.; Kneer, R.; Sensitivity analysis for parameters for radiative heat transfer in a 3-D pulverized coal combustion scenario, Eurotherm Semin. 110 - Comput. Therm. Radiat. Particip. Media - VI, Cascais, Portugal, 2018, p. 1-8
Graeser, P; Schiemann, M. Emissivity comparison between chars and demineralized coal chars under oxy-combustion conditions, Chemical Engineering & Technology, accepted for publication, 2018
Senneca, O.; Cerciello, F.; Cortese, L.; Heuer, S.; Schiemann, M.; Scherer, V. Effects of CO2 enriched atmosphere on chars from walnut shells pyrolysis in a drop tube reactor, FUEL, accepted for publication, 2018
Panahi, A.; Tarakcioglu, M.; Schiemann, M.; Delichatsios, M.; Levendis, Y.A. On the particle sizing of torrefied biomass for co-firing with pulverized coal, Combustion & Flame 194, 2018, 72-84
Vorobiev, N.; Schiemann, M.; Scherer, V. Optical investigation of char combustion kinetics under oxy-fuel conditions, FRF 2018 Conference, Sheffield, UK, 30-31 May 2018
Schiemann, M.; Bergthorson, J.M.; Taroata, D.; Schmid, G.; Scherer, V. Re-utilizing carbon dioxide in metal combustion processes, Clearwater Clean Energy Conference, Clearwater, Florida, 03-08 June 2018
Schiemann, M.; Bergthorson, J.M.; Scherer, V. Reducing the carbon foot print of spray roasters: iron as fuel in iron chloride processing, Clearwater Clean Energy Conference, Clearwater, Florida, 03-08 June 2018
Maas, P.; Schiemann, M.; Scherer, V.; Fischer, P.; Taroata, D.; Schmid, G. Lithium as energy carrier: CFD simulations of LI combustion in a 100 MW slag tap furnace, Accepted for publications: Applied Energy
Senneca, O; Cerciello, F.; Cortese, L.; Heuer, S.; Schiemann, M.; Scherer, V. Effects of oxy-fuel conditions on walnut shells pyrolysis in a drop tube reactor, Tenth Mediterranean Combustion Symposium, 17.-21. September 2017, Neapel, Italien
Vorobiev, N.; Becker, A.; Kruggel-Emden, H.; Panahi, A.; Levendis, Y.; Schiemann, M. Particle shape and Stefan flow effects on the burning rate of torrefied biomass, Fuel, Accepted for publication, 2017
Becker, A.; Schiemann, M.; Scherer, V.; Shaddix, C.; Haxter, D.; Mayer, J. Comparative ignition tests of coal under oxy-fuel conditions in a standardized laboratory test rig, FUEL 208, 2017, 127-136, doi:10.1016/j.fuel.2017.06.129
Schiemann, M.; Wedler, C.; Vorobiev, N.; Richter, M.; Span, R.; Scherer, V. Effektive Diffusionskoeffizienten in Kokspartikeln aus Oxyfuel-Feuerungen, 28. Deutscher Flammentag, Darmstadt, Germany, 06. -07. September 2017
Graeser, P.; Schiemann, M. Einfluss der Partikelgröße auf den Partikelemissionsgrad eines Steinkohlekokses, 28. Deutscher Flammentag, Darmstadt, Germany, 06. -07. September 2017
Ontyd, C.; Becker, A.; Schiemann, M.; Krause, B.; Wirtz, S.; Scherer, V.; Franiczek, J.; Trost, J. Kombination von Versuchen am Einzelpartikelreaktor und einem Drehrohr zur Torrefizierung von Kiefer und Pappel, 28. Deutscher Flammentag, Darmstadt, Germany, 06. -07. September 2017
Schiemann, M.; Graeser, P.; Heuer, S.; Vorobiev, N.; Scherer, V. Combustion investigations with Colombian coal: Summary of experiments and numerical interpretation, 42st International Technical Conference on Clean Coal & Fuel Systems, 11.-15. Juni 2017, Clearwater, Florida, USA
Vorobiev, N.; Senneca, O.; Schiemann, M. Influence of devolatilization conditions on char reactivity, 42st International Technical Conference on Clean Coal & Fuel Systems, 11.-15. Juni 2017, Clearwater, Florida, USA
Maas, P.; Schiemann, M.; Scherer, V.; Fischer, P.; Taroata, D.; Schmid, G. CFD Simulation of a 100 MWth Lithium Combustion Slag Tap Furnance as a basis for an Energy Storage Process, Energy Procedia 105, 2017, 3978-3983
Panahi, N.; Levendis, Y.A.; Vorobiev, N.; Schiemann, M. Direct observations on the combustion characteristics of miscanthus and beechwood biomass including fusion and spherodization, Fuel Process. Technol., accepted for publication, 2017
Schiemann, M.; ; Fischer, P.; Bergthorson, J. Iron particles, as carbon-neutral fuel in spray roasting reactors, Proceedings of the 8th European Combustion Meeting, Dubrovnik, Croatia, April 2017
Farazi, S.; Schiemann, M.; Vorobiev, N.; Scherer, V.; Kang, S.; Pitsch, H. A New Variable Transport Coefficient Single-Film Model for Char Combustion, Proceedings of the 8th European Combustion Meeting, Dubrovnik, Croatia, April 2017
Schiemann, M.; Fischer, P.; Bergthorson, J.M.; Schmid, G.; Taroata, D. Experimental investigations on the combustion of lithium particles in CO2 and CO2-N2 mixtures, Fuel 199, 2017, 28-37
Becker, A.; Schiemann, M.; Scherer, V.; Haxter, D.; Mayer, J. Pulverized coal ignition testing under air-fired conditions using the Zelkowski method: comparison of coals of different rank and provenience, 11TH European Conference on Industrial Furnaces and Boilers, Albufeira, Portugal, 18th-21st April, 2017
Graeser, P.; Schiemann, M. Emissivity of burning bituminous coal char particles - burnout effects, Fuel 196, 2017, 336-343
Gronarz, T.; Schulze, J.C.; Laemmerhold, M.; Graeser, P.; Gorewoda, J.; Kez, V.; Habermehl, M.; Schiemann, M.; Stroehle, J.; Epple, B.; Scherer, V.; Kneer, R. Quantification of the influence of submodels on radiative heat transport in an oxy-fuel operated boiler, Fuel Processing Technology 157, 2017, 76-89
Ren, X.; Sun, R.; Meng, X.; Vorobiev, N.; Schiemann, M.; Levendis, Y.A. Carbon, Sulfur and Nitrogen Oxide Emissions from Combustion of Pulverized Raw and Torrefied Biomass, Fuel 188, 2017, 310-323
Apicella, B.; Senneca, O.; Russo, C.; Heuer, S.; Cortese, L.; Cerciello, F.; Scherer, V.; Schiemann, M.; Ciajolo, A. Separation and characterization of carbonaceous particulate (soot and char) produced from fast pyrolysis of coal in inert and CO2 rich atmospheres, Fuel 201, 2017, 118-123 DOI: 10.1016/j.fuel.2016.11.049
Farazi, S.; Sadr, M.; Kang, S.; Schiemann, M.; Vorobiev, N.; Scherer, V. Resolved simulations of single char particle combustion in a laminar flow field, Fuel, DOI: 10.1016/j.fuel.2016.11.011
Pielsticker, S.; Heuer, S.; Senneca, O.; Cerciello, F.; Salatino, P.; Cortese, L.; Gövert, B.; Hatzfeld, O.; Schiemann, M.; Scherer, V.; Kneer, R. Comparision of pyrolysis test rigs for oxy-fuel conditions, Fuel Processing Technology, Fuel Process. Technol. 156, 2017, 461-472
Mass, P.; Schiemann, M.; Fischer, V.; Taroata, P.; Schmid, G. CFD Simulation of a 100 MWth Lithium Combustion Slag Tap Furnace as a basis for an energy storage process, ICAE2016, Beijing, China, 8.-11. Oktober 2016
Schiemann, M.; de Haan, A.; Wirtz, S. Numerical investigation on particle swelling in spray roasting reactors, International Journal of Multiphase Flow Vol. 85, 2016, 38-47
Seibel, C.; Wedler, C.; Vorobiev, N.; Schiemann, M.; Scherer, V.; Span, R.; Fieback, T. Sorption Measurements for Determining Surface Effects and Structure of Solid Fuels, Fuel Processing Technology 153, 2016, 81-86
Senneca, O.; Apicella, B.; Heuer, S.; Schiemann, M.; Scherer, V.; Stanzione, F.; Ciajolo, A.; Russo, C. Effects of CO2 on submicronic carbon particulate (soot) formed during coal pyrolysis in a drop tube reactor, Combustion and Flame 172, 2016, 302-308
Graeser, P.; Schiemann, M. Char particle emissivity of two coal chars in oxy-fuel atmospheres, Fuel 183, 2016, 405-413
Schiemann, M.; Fischer, P.; Bergthorson, J.; Schmid, G.; Taroata, D. Combustion of Lithium Particles in N2 - Reaction Rates, Combustion Science and Technology 189, 2016, 169-186
Vorobiev, N.; Geier, M.; Schiemann, M.; Scherer, V. Experimentation for Char Combustion Kinetics Measurements: Bias from Char Preparation, Fuel Processing Technolgy 151, 2016, 151-165
Heuer, S.; Senneca, O.; Wütscher, A.; Düdder, H.; Schiemann, M.; Muhler, M.; Scherer, V. Effects of oxy-fuel conditions on the products of pyrolysis in a drop tube reactor, Fuel Processing Technolgy 150, 2016, 41-49
Knappstein, R.; Kuenne, G.; Ketelheun, A.; Köser, J.; Becker, L.; Heuer, S.; Schiemann, M.; Scherer, V.; Dreizler, A.; Sadiki, A.; Janicka, J. Devolatilization and volatiles reaction of individual coal particles in the context of FGM tabulated chemistry, Combustion and Flame 169, Juli 2016, 72-84
Cerciello, F.; Cortese, L.; Heuer, S.; Scherer, V.; Schiemann, M.; Senneca, O. Effect of CO2 on coal pyrolysis at high and low heating rates on char reactivity, XXXIX. Meeting of the Italian Section of the Combustion Institute, 4.-6. Juli 2016, Naples, Italy
Cerciello, F.; Cortese, L.; Heuer, S.; Scherer, V.; Schiemann, M.; Senneca, O. Effect of CO2 on chars produced from coal and biomass at high heating rates, XXXIX. Meeting of the Italian Section of the Combustion Institute, 4.-6. Juli 2016, Naples, Italy
Panahi, A.; Levendis, Y.A.; Vorobiev, N.; Schiemann, M.; Scherer, V. Combustion Behavior of herbaceous and woody biomass, 41st International Technical Conference on Clean Coal & Fuel Systems, 05.-09. Juni 2016, Clearwater, Florida, USA
Schiemann, M.; Haarmann, S.; Wirtz, S.; Scherer, V.; Ehmann, M.; Kuhr, C. Combustion characterisation of fuels for power plants: From laboratory experiments to boiler furnace simulation, VGB PowerTech 3, 2016, 33-40
Düdder, H.; Wütscher, A.; Vorobiev, N.; Schiemann, M.; Scherer, V.; Muhler, M. Oxidation characteristics of a cellulose-derived hydrochar in thermogravimetric and laminar flow burner experiments, Fuel Processing Technology 148, 2016, 85-90
Oschmann, T.; Schiemann, M.; Kruggel-Emden, H. Development and verification of a resolved 3D inner particle heat transfer model for the Discrete Element Method (DEM), Powder Technology 291, 2016, 392-407
Schiemann, M.; Bergthorson, J.; Fischer, P.; Scherer, V.; Taroata, D.; Schmid, G. A Review on Lithium Combustion, Applied Energy 162, 2016, 948-965
Becker, A.; Schiemann, M.; Heuer, S.; Vorobiev, N.; Scherer, V.; Haxter, D.; Mayer, J. A standardized method for the characterization of coal ignition under oxyfuel conditions, International Pittsburgh Coal Conference, 5.-8. Oktober 2015
Heuer, S.; Schiemann, M.; Scherer, V. Determination of devolatilization kinetics in inert and CO2-enriched atmospheres in a plug flow reactor, International Pittsburgh Coal Conference, 5.-8. Oktober 2015
Köser, J.; Becker, L.G.; Vorobiev, N.; Schiemann, M.; Scherer, V.; Böhm, B.; Dreizler, A. Characterization of single coal particle combustion within oxygen-enriched environments using high-speed OH-PLIF, Applied Physics B, 1-6, Oktober 2015
Fischer, P.; Schiemann, M.; Scherer, V.; Maas, P; Taroata, D.; Schmid, G. A numerical model of the combustion of single Lithium particles with CO2, Fuel 160, 87-99, 2015
Vorobiev, N.; Schiemann, M.; Scherer, V. Pyrometrische Bestimmung von Koksabbrandkinetiken unter Oxyfuel-Bedingungen, 27. Deutscher Flammentag, 16.-17. September 2015, Clausthal-Zellerfeld, Germany
Gövert, B.; Pielsticker, N.; Vorobiev, N.; Heuer, S.; Hatzfeld, O.; Kneer, R.; Schiemann, M.; Scherer, V. Examination of Pyrolysis and Char Burnout in Oxyfuel Atmosphere using Plug Flow and Well Stirred Reactor Type Systems, 18th IFRF Members' Conference, 1.-3. Juni 2015, Freising, Germany
Vorobiev, N.; Schiemann, M. Determination of Char combustion kinetics of torrefied biomass by use of stereoscopic pyrometry, 40th International Technical Conference on Clean Coal & Fuel Systems, 31. Mai - 4. Juni 2015, Clearwater, Florida, USA
Haarmann, S.; Schiemann, M.; Scherer, V.; Ehmann, M.; Kuhr, C. Pulverized Torrefied Beech Wood as a Fuel For Power Plants: Kinetics and Boiler Furnace Simulation, 40th International Technical Conference on Clean Coal & Fuel Systems, 31. Mai - 4. Juni 2015, Clearwater, Florida, USA
Graeser, P.; Schiemann, M. An Attempt to Measure the Emissivity of Burning Coal Particles in Oxy-Fuel Atmospheres: Test rig calibration and first results, 40th International Technical Conference on Clean Coal & Fuel Systems, 31. Mai - 4. Juni 2015, Clearwater, Florida, USA
Gorewoda, J.; Schiemann, M.; Scherer, V.; Neuroth, M. An examination on the influence of the oxidation state of iron on the spectral radiative emissivity of synthetic ash layers, 40th International Technical Conference on Clean Coal & Fuel Systems, 31. Mai - 4. Juni 2015, Clearwater, Florida, USA
Fischer, P.; Schiemann, M.; Scherer, V.; Taroata, D.; Schmid, G. Determination of reaction kinetics of combusting Lithium particles in CO2 and CO2-N2 mixtures, 9th U.S. National Combustion Meeting, 17.-20. Mai 2015, Cincinnati, Ohio, USA
Fischer, P.; Schiemann, M.; Scherer, V.; Taroata, D.; Schmid, G. Experimental Study on the Combustion of Lithium particles in CO2 and CO2-N2 mixtures, European Combustion Meeting 2015, 30. März - 2. April 2015, Budapest, Hungary
Schiemann, M.; Vorobiev, N. Stereoscopic Camera-Based Investigation of Pulverized Solid Fuel Combustion - particle temperature, shape and burning rates, European Combustion Meeting 2015, 30. März - 2. April 2015, Budapest, Hungary
Fischer, P.; Schiemann, M.; Scherer, V.; Maas, P; Taroata, D.; Schmid, G. Experimental Characterization of the Combustion of single Lithium Particles with CO2, Fuel 153, 90-101, 2015
Schiemann, M.; Vorobiev, N.; Scherer, V. A Stereoscopic Pyrometer for Char Combustion Characterization, Applied Optics 54 (5), 1097-1108, 2015
Greffrath, F.; Gorewoda, J.; Schiemann, M.; Scherer, V. Influence of chemical composition and physical structure on normal radiant emittance characteristics of ash deposits, FUEL 134, 307-314, 15. Oktober 2014
Schiemann, M.; Haarmann, S.; Vorobiev, N. Char burning Kinetics from Imaging Pyrometry: Particle Shape Effects, FUEL 134, 53-62, 15. Oktober 2014
Haarmann, S.; Schiemann, M.; Scherer, V. Experimental investigation on the pyrolysis of pulverized torrefied biomass and coal at high heating rates, 20th Int. Symp. on Analytical and Applied Pyrolysis, 19.-23. Mai 2014, Birmingham, UK
Schiemann, M.; Geier, M.; Shaddix, C.; Vorobiev, N.; Scherer V. Determination of char combustion kinetics parameters: Comparison of point detector and imaging-based particle-sizing pyrometry, Review of Scientific Instruments 85, 075114, 2014
Schiemann, M.; Fischer, P.; Scherer, V.; Schmid, G.; Taroata, D. Combustion of Lithium Particles: Optical Measurement Methodology and Initial Results, Chemical Engineering Technology 37, No.9, 1436-1442, 2014
Kellermann, R.; Taroata, D.; Schiemann, M.;Eckert, H.; Fischer, P.; Scherer, V.; Schmid, G. Reaction Products in the Combustion of the High Energy Density Storage Material Lithium with Carbon Dioxide and Nitrogen, 2013 MRS Fall Meeting & Exhibit, 1.-6. Dezember, 2013, Boston, Massachusetts, USA
Haarmann, S.; Becker, A.; Krusch, S.; Schiemann, M.; Scherer, V. Experimentelle Untersuchungen zum Verbrennungsverhalten von torrefizierten Holzpellets in einer 0,1 MW zirkulierenden Wirbelschichtfeuerung, 26. Deutscher Flammentag, 11.-12. September, 2013, Duisburg, Germany
Schiemann, M.; Fischer, P.; Maas, P.; Scherer, V. Investigation on exothermal reactions of Lithium with gases for energy production, Eighth Mediterranean Combustion Symposium, 8.-13. September, 2013, Izmir, Turkey
Haarmann, S.; Schiemann, M.; Scherer, V. Experimental investigation on the combustion behaviour of torrefied biomass, 21st European Biomass Conference and Exhibition (EU BC&E), 3.-7. Juni, 2013, Copenhagen, Denmark
Haarmann, S.; Schiemann, M.; Scherer, V. On the combustion behaviour of pulverized torrefied biomass: Experiments on pyrolysis and char-burn out, The 38th Clearwater clean coal conference, 2.-6. Juni, 2013, Clearwater, USA
Taroata, D.; Schiemann, M.; Kellermann, R.; Fischer, P.; Scherer, V.; Eckert, H.; Schmid, G. Energy storage and conversion of CO2 to valuable products with electropositive metals, 2nd International Conference on Materials for Energy, EnMat II, 12.-16. Mai, 2013, Karlsruhe, Germany
Taroata, D.; Schiemann, M.; Kellermann, R.; Fischer, P.; Scherer, V.; Eckert, H.; Schmid, G. Combustion of electropositive metals with carbon dioxide or nitrogen to obtain thermal energy and valuable products, 3. Statuskonferenz zur BMBF-Fördermaßnahme "Technologien für Nachhaltigkeit und Klimaschutz - Chemische Prozesse und stoffliche Nutzung von CO2", 9.-10. April, 2013, Berlin, Germany
Schiemann, M.; Wirtz, S.; Scherer, V.; Bärhold, F. Spray Roasting of Iron Chloride FeCl2: Numerical Modelling of Industrial Scale Reactors, Powder Technology 245, 70-79, 2013
Schiemann, M.; Wirtz, S.; Scherer, V.; Bärhold, F. Spray Roasting of Iron Chloride FeCl2: Laboratory Scale Experiments and a Model for Numerical Simulation, Powder Technology 228, 301-308, 2012
Wakamatsu, H.; Mine, S.; Schiemann, M.; Scherer, V. Study on char burning rate for single particle combustion with in-situ measurement under oxy-fuel condition, The 36th International Technical Conference on Clean Coal & Fuel Systems, 5.-9. Juni 2011, Clearwater, USA
Schiemann, M.; Scherer, V.; Wirtz, S. Optical measurement of temperature, particle size and particle shape of burning biomass particles, The 36th International Technical Conference on Clean Coal & Fuel Systems, 5.-9. Juni 2011, Clearwater, USA
Greffrath, F.; Schiemann, M.; Scherer, V.;Gwosdz, A. Spectral Emittance Characteristics of Powdery and Molten Coal Ashes, World of Coal Ash Conference WOCA 2011, 9.-12. Mai 2011, Denver, CO, USA
Schiemann, M.; Wirtz, S.; Scherer, V.; Gas phase alkali release from solid fuels determined with a low–cost fiber spectrometer, Clearwater Coal Conference 6.–10. Juni 2010, Clearwater, USA
Schiemann, M.; Wirtz, S.; Scherer, V.; Optical measurement of pulverized coal combustion in a laminar flow reactor: ignition, particle temperature, and alkali release, 10th International Conference on combustion and energy utilisation, 4.-8. Mai 2010, Mugla, Turkey
Schiemann, M.; Scherer,V.; Wirtz, S. Optical Coal Particle Temperature Measurement under Oxy-Fuel Conditions: Measurement Methodology and Initial Results, Chemical Engineering & Technology 32, 12, 2000-2004, 2009