Exhaust Gas Center Karlsruhe
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Exhaust Gas Center Karlsruhe
Exhaust Gas Center Karlsruhe
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Staff

Dr. Maria Casapu

Research

  • Catalytic converters for emission control

  • Preparation and characterization of heterogeneous catalysts

  • Kinetic measurements
  • X-ray absorption spectroscopy
 

Education

2002 -  2007     Dr. Sc. ETH Zürich

                        Eidgenössische Technische Hochschule Zürich (ETH Zürich), Switzerland

                        Department of Chemistry and Applied Biosciences 

                        Thesis: NOx storage-reduction catalysts. Material aspects, thermal ageing and reactivation

 

1999 - 2001      M. Sc. Chemistry of Compounds with Biological Activity

                        West Unversity of Timisoara, Romania

 

1995 - 1999      B. Sc. Chemistry

                        West University of Timisoara, Romania

                 

 

 

Work History

since 2012       Chief Scientific Officer of the Exhaust Gas Center Karlsruhe

                       Karlsruhe Institute of Technology

                       Institute for Chemical Technology and Polymer Chemistry

 

2011 - 2012      Senior Scientist, Karlsruhe Institute of Technology, Germany 

                        Leader of the Exhaust Gas Aftertreatment Team in the Chemical Technology and Catalysis Group 

                        Institute for Chemical Technology and Polymer Chemistry

 

2007 - 2011      PostDoc, Paul Scherrer Institute (PSI), Switzerland

                        Catalysis for Energy Group

                        Research focus: NOx removal, soot oxidation, urea hydrolysis and hydrothermal ageing studies

                        for conventional zeolite- and novel CeO2-based NH3-SCR catalysts

                     

 

Recent Publications


Operando X-ray Absorption Spectroscopy Study during Conditioning of Pt-Based Catalysts and Its Implications for CO Oxidation.
Gänzler, A. M.; Betz, B.; Baier-Stegmaier, S.; Belin, S.; Briois, V.; Votsmeier, M.; Casapu, M.
2020. The journal of physical chemistry <Washington, DC> / C, 124 (37), 20090–20100. doi:10.1021/acs.jpcc.0c04740
Emission of Toxic HCN During NOx Removal by Ammonia SCR in the Exhaust of Lean-Burn Natural Gas Engines.
Zengel, D.; Koch, P.; Torkashvand, B.; Grunwaldt, J.-D.; Casapu, M.; Deutschmann, O.
2020. Angewandte Chemie / International edition, 59 (34), 14423–14428. doi:10.1002/anie.202003670
Understanding Sulfur Poisoning of Bimetallic Pd-Pt Methane Oxidation Catalysts and their Regeneration.
Lott, P.; Eck, M.; Doronkin, D. E.; Zimina, A.; Tischer, S.; Popescu, R.; Belin, S.; Briois, V.; Casapu, M.; Grunwaldt, J.-D.; Deutschmann, O.
2020. Applied catalysis / B, Art.Nr.: 119244. doi:10.1016/j.apcatb.2020.119244
Tracking the formation, fate and consequence for catalytic activity of Pt single sites on CeO2.
Maurer, F.; Jelic, J.; Wang, J.; Gänzler, A.; Dolcet, P.; Wöll, C.; Wang, Y.; Studt, F.; Casapu, M.; Grunwaldt, J.-D.
2020. Nature catalysis. doi:10.1038/s41929-020-00508-7
Hydrocarbon and soot oxidation over cerium and iron doped vanadium SCR catalysts.
Casapu, M.; Zheng, L.; Zimina, A.; Grunwaldt, J.-D.
2020. ChemCatChem. doi:10.1002/cctc.202001314
Exploiting the dynamic properties of Pt on ceria for low-temperature CO oxidation.
Ferré, G.; Aouine, M.; Bosselet, F.; Burel, L.; Cadete Santos Aires, F. J.; Geantet, C.; Ntais, S.; Maurer, F.; Casapu, M.; Grunwaldt, J.-D.; Epicier, T.; Loridant, S.; Vernoux, P.
2020. Catalysis science & technology, 10 (12), 3904–3917. doi:10.1039/d0cy00732c
Freisetzung von toxischem HCN bei der Stickoxidreduktion mittels NH₃‐SCR in mager betriebenen Erdgasmotoren.
Zengel, D.; Koch, P.; Torkashvand, B.; Grunwaldt, J.-D.; Casapu, M.; Deutschmann, O.
2020. Angewandte Chemie, 132 (34), 14530–14535. doi:10.1002/ange.202003670
PGM based catalysts for exhaust-gas after-treatment under typical diesel, gasoline and gas engine conditions with focus on methane and formaldehyde oxidation.
Gremminger, A.; Pihl, J.; Casapu, M.; Grunwaldt, J.-D.; Toops, T. J.; Deutschmann, O.
2020. Applied catalysis / B, 265, Article No.118571. doi:10.1016/j.apcatb.2019.118571
Unravelling the Different Reaction Pathways for Low Temperature CO Oxidation on Pt/CeO2 and Pt/Al2O3 by Spatially Resolved Structure–Activity Correlations.
Gänzler, A. M.; Casapu, M.; Doronkin, D. E.; Maurer, F.; Lott, P.; Glatzel, P.; Votsmeier, M.; Deutschmann, O.; Grunwaldt, J.-D.
2019. The journal of physical chemistry letters, 10 (24), 7698–7705. doi:10.1021/acs.jpclett.9b02768
Impact of Preparation Method and Hydrothermal Aging on Particle Size Distribution of Pt/γ-AlO and Its Performance in CO and NO Oxidation.
Ogel, E.; Casapu, M.; Doronkin, D. E.; Popescu, R.; Störmer, H.; Mechler, C.; Marzun, G.; Barcikowski, S.; Türk, M.; Grunwaldt, J.-D.
2019. The journal of physical chemistry <Washington, DC> / C, 123 (9), 5433–5446. doi:10.1021/acs.jpcc.8b11065
Oxidation State and Dielectric Properties of Ceria-Based Catalysts by Complementary Microwave Cavity Perturbation and X-Ray Absorption Spectroscopy Measurements.
Steiner, C.; Gänzler, A. M.; Zehentbauer, M.; Hagen, G.; Casapu, M.; Müller, S.; Grunwaldt, J.-D.; Moos, R.
2019. Topics in catalysis, 62 (1-4), 227–236. doi:10.1007/s11244-018-1110-3
Selective Catalytic Reduction of NOx with Ammonia and Hydrocarbon Oxidation Over V2O5–MoO3/TiO2 and V2O5–WO3/TiO2 SCR Catalysts.
Zheng, L.; Casapu, M.; Stehle, M.; Deutschmann, O.; Grunwaldt, J.-D.
2019. Topics in catalysis, 62 (1-4), 129–139. doi:10.1007/s11244-018-1097-9
Insight into the Nature of Active Species of Pt/Al2O3 Catalysts for low Temperature NH3 Oxidation.
Svintsitskiy, D. A.; Kibis, L. S.; Stadnichenko, A. I.; Slavinskaya, E. M.; Romanenko, A. V.; Fedorova, E. A.; Stonkus, O. A.; Doronkin, D. E.; Marchuk, V.; Zimina, A.; Casapu, M.; Grunwaldt, J.; Boronin, A. I.
2019. ChemCatChem, cctc.201901719. doi:10.1002/cctc.201901719
NH3-SCR over V-W/TiO2 Investigated by Operando X-ray Absorption and Emission Spectroscopy.
Doronkin, D. E.; Benzi, F.; Zheng, L.; Sharapa, D. I.; Amidani, L.; Studt, F.; Roesky, P. W.; Casapu, M.; Deutschmann, O.; Grunwaldt, J.-D.
2019. The journal of physical chemistry <Washington, DC> / C, 123 (23), 14338–14349. doi:10.1021/acs.jpcc.9b00804
The Effect of Prereduction on the Performance of Pd/Al₂O₃ and Pd/CeO₂ Catalysts during Methane Oxidation.
Lott, P.; Dolcet, P.; Casapu, M.; Grunwaldt, J.-D.; Deutschmann, O.
2019. Industrial & engineering chemistry research, 58 (28), 12561–12570. doi:10.1021/acs.iecr.9b01267
The dynamic nature of Cu sites in Cu-SSZ-13 and the origin of the seagull NOx conversion profile during NH₃-SCR.
Fahami, A. R.; Günter, T.; Doronkin, D. E.; Casapu, M.; Zengel, D.; Vuong, T. H.; Simon, M.; Breher, F.; Kucherov, A. V.; Brückner, A.; Grunwaldt, J.-D.
2019. Reaction chemistry & engineering, 4 (6), 1000–1018. doi:10.1039/c8re00290h
Tuning the Pt/CeO Interface by in Situ Variation of the Pt Particle Size.
Gänzler, A. M.; Casapu, M.; Maurer, F.; Störmer, H.; Gerthsen, D.; Ferré, G.; Vernoux, P.; Bornmann, B.; Frahm, R.; Murzin, V.; Nachtegaal, M.; Votsmeier, M.; Grunwaldt, J.-D.
2018. ACS catalysis, 8 (6), 4800–4811. doi:10.1021/acscatal.8b00330
Regeneration of Sulfur Poisoned Pd–Pt/CeO2–ZrO2–Y2O3–La2O3 and Pd–Pt/Al2O3 Methane Oxidation Catalysts.
Lott, P.; Eck, M.; Doronkin, D. E.; Popescu, R.; Casapu, M.; Grunwaldt, J.-D.; Deutschmann, O.
2018. Topics in catalysis, 62 (164–171). doi:10.1007/s11244-018-1121-0
Impact of the Gas Mixture and Aging Conditions on Formaldehyde Conversion over a Series of Commercial Pt-Based Catalysts.
Schedlbauer, T.; Gremminger, A.; Casapu, M.; Deutschmann, O.; Grunwaldt, J.-D.
2018. SAE technical papers, 2018–01. doi:10.4271/2018-01-5021
Tuning the Structure of Platinum Particles on Ceria In Situ for Enhancing the Catalytic Performance of Exhaust Gas Catalysts.
Gänzler, A. M.; Casapu, M.; Vernoux, P.; Loridant, S.; CadeteSantosAires, F. J.; Epicier, T.; Betz, B.; Hoyer, R.; Grunwaldt, J.-D.
2017. Angewandte Chemie / International edition, 56 (42), 13078–13082. doi:10.1002/anie.201707842
Sulfur poisoning and regeneration of bimetallic Pd-Pt methane oxidation catalysts.
Gremminger, A.; Lott, P.; Merts, M.; Casapu, M.; Grunwaldt, J.-D.; Deutschmann, O.
2017. Applied catalysis / B, 218, 833–843. doi:10.1016/j.apcatb.2017.06.048
Origin of the Normal and Inverse Hysteresis Behavior during CO Oxidation over Pt/Al₂O₃.
Casapu, M.; Fischer, A.; Gänzler, A. M.; Popescu, R.; Crone, M.; Gerthsen, D.; Türk, M.; Grunwaldt, J.-D.
2017. ACS catalysis, 7 (1), 343–355. doi:10.1021/acscatal.6b02709
Comparison of the Catalytic Performance and Carbon Monoxide Sensing Behavior of Pd-SnO₂ Core@Shell Nanocomposites.
Ogel, E.; Müller, S. A.; Sackmann, A.; Gyger, F.; Bockstaller, P.; Brose, E.; Casapu, M.; Schöttner, L.; Gerthsen, D.; Feldmann, C.; Grunwaldt, J.-D.
2017. ChemCatChem, 9 (3), 407–413. doi:10.1002/cctc.201601132
HERFD-XANES and XES as complementary operando tools for monitoring the structure of Cu-based zeolite catalysts during NOx-removal by ammonia SCR.
Günter, T.; Doronkin, D. E.; Carvalho, H. W. P.; Casapu, M.; Grunwaldt, J.-D.
2016. Journal of physics / Conference Series, 712 (1), Art. Nr.: 012071. doi:10.1088/1742-6596/712/1/012071
Using combined XAS/DRIFTS to study CO/NO Oxidation over Pt/Al2O3 catalysts.
Gänzler, A. M.; Lichtenberg, H.; Frenkel, A. I.; Casapu, M.; Boubnov, A.; Wang, D.; Grunwaldt, J.-D.
2016. Journal of physics / Conference Series, 712 (1), Art. Nr.: 012045. doi:10.1088/1742-6596/712/1/012045
The SCR of NOx with NH3 Examined by Novel X-ray Emission and X-ray Absorption Methods.
Günter, T.; Doronkin, D. E.; Boubnov, A.; Carvalho, H. W. P.; Casapu, M.; Grunwaldt, J.-D.
2016. Topics in catalysis, 59 (10-12), 866–874. doi:10.1007/s11244-016-0561-7
Cu-SSZ-13 as pre-turbine NOx-removal-catalyst: Impact of pressure and catalyst poisons.
Günter, T.; Pesek, J.; Schäfer, K.; Bertótiné Abai, A.; Casapu, M.; Deutschmann, O.; Grunwaldt, J.-D.
2016. Applied catalysis / B, 198, 548–557. doi:10.1016/j.apcatb.2016.06.005
Study on the hydrothermal and SO₂ stability of Al₂O₃-supported manganese and iron oxide catalysts for lean CO oxidation.
Tepluchin, M.; Kureti, S.; Casapu, M.; Ogel, E.; Mangold, S.; Grunwaldt, J. D.
2015. Catalysis today, 258, 498–506. doi:10.1016/j.cattod.2015.01.010
Structural snapshots of the SCR reaction mechanism on Cu-SSZ-13.
Günter, T.; Carvalho, H. W. P.; Doronkin, D. E.; Sheppard, T.; Glatzel, P.; Atkins, A. J.; Rudolph, J.; Jacob, C. R.; Casapu, M.; Grunwaldt, J. D.
2015. Chemical communications, 51, 9227–9230. doi:10.1039/C5CC01758K
Operando spatially and time-resolved X-ray absorption spectroscopy and infrared thermography during oscillatory CO oxidation.
Gänzler, A. M.; Casapu, M.; Boubnov, A.; Müller, O.; Conrad, S.; Lichtenberg, H.; Frahm, R.; Grunwaldt, J. D.
2015. Journal of catalysis, 328, 216–224. doi:10.1016/j.jcat.2015.01.002
Aging of a Pt/Al₂O₃ exhaust gas catalyst monitored by quasi in situ X-ray micro computed tomography.
Hofmann, G.; Rochet, A.; Ogel, E.; Casapu, M.; Ritter, S.; Ogurreck, M.; Grunwaldt, J.-D.
2015. RSC Advances, 5 (9), 6893–6905. doi:10.1039/C4RA14007A
Influence of single- and double-flame spray pyrolysis on the structure of MnOₓ/γ-Al₂O₃ and FeOₓ/γ-Al₂O₃ catalysts and their behaviour in CO removal under lean exhaust gas conditions.
Tepluchin, M.; Pham, D. K.; Casapu, M.; Mädler, L.; Kureti, S.; Grunwaldt, J.-D.
2015. Catalysis science & technology, 5 (1), 455–464. doi:10.1039/C4CY00727A
Ageing effects on exhaust gas catalysts: Microscopic changes captured by x-ray tomography.
Hofmann, G.; Rochet, A.; Baier, S.; Casapu, M.; Ritter, S.; Wilde, F.; Ogurreck, M.; Beckmann, F.; Grunwaldt, J.-D.
2014. Journal of physics / Conference Series, 499 (1), 012017/1–11. doi:10.1088/1742-6596/499/1/012017
Fe and Mn-Based catalysts supported on γ-Al₂O₃ for CO oxidation under O₂-rich conditions.
Tepluchin, M.; Casapu, M.; Boubnov, A.; Lichtenberg, H.; Wang, D.; Kureti, S.; Grunwaldt, J.-D.
2014. ChemCatChem, 6 (6), 1763–1773. doi:10.1002/cctc.201301040
Operando spatially- and time-resolved XAS study on zeolite catalysts for selective catalytic reduction of NOₓ by NH₃.
Doronkin, D. E.; Casapu, M.; Günter, T.; Müller, O.; Frahm, R.; Grunwaldt, J. D.
2014. The journal of physical chemistry <Washington, DC> / C, 118, 10204–10212. doi:10.1021/jp5028433
Oscillatory CO oxidation over Pt/Al₂O₃ catalysts studied by in situ XAS and DRIFTS.
Boubnov, A.; Gänzler, A.; Conrad, S.; Casapu, M.; Grunwaldt, J.-D.
2013. Topics in catalysis, 56 (1-8), 333–338. doi:10.1007/s11244-013-9976-6
Potential and limitations of natural chabazite for selective catalytic reduction of NOₓ with NH₃.
Günter, T.; Casapu, M.; Doronkin, D.; Mangold, S.; Trouillet, V.; Augenstein, T.; Grunwaldt, J.-D.
2013. Chemie - Ingenieur - Technik, 85 (5), 632–641. doi:10.1002/cite.201200182