Publications of Rafat Ahmad

Ahmad, R.; Melsheimer, J.; Jentoft, F. C.; Schlögl, R.: Isomerization of n-Butane and of n-Pentane in the Presence of Sulfated Zirconia: Formation of Surface Deposits Investigated by In Situ UV-vis Diffuse Reflectance Spectroscopy. Journal of Catalysis 218, pp. 365 - 374 (2003)

Kuba, S.; Lukinskas, P.; Ahmad, R.; Jentoft, F. C.; Grasselli, R. K.; Gates, B. C.; Knözinger, H.: Reaction Pathways in n-Pentane Conversion Catalyzed by Tungstated Zirconia: Effects of Platinum in the Catalyst and Hydrogen in the Feed. Journal of Catalysis 219 (2), pp. 376 - 388 (2003)

Melsheimer, J.; Thiede, M.; Ahmad, R.; Tzolova-Müller, G.; Jentoft, F. C.: Improved experimental setup for in situ UV-vis-NIR spectroscopy under catalytic conditions. Physical Chemistry Chemical Physics 5 (20), pp. 4366 - 4370 (2003)

Melsheimer, J.; Kröhnert, J.; Ahmad, R.; Klokishner, S.; Jentoft, F. C.; Mestl, G.; Schlögl, R.: UV/Vis/near-IR spectroscopic characteristics of H_4-xCs_xPVMo₁₁O₄₀ (x=0,2) catalyst under different temperatures and gas atmospheres. Physical Chemistry Chemical Physics 4 (11), pp. 2398 - 2408 (2002)

Klokishner, S.; Melsheimer, J.; Ahmad, R.; Jentoft, F. C.; Mestl, G.; Schlögl, R.: Influence of the Dehydration Effects on the Optical Spectra of H₄PVMo₁₁O₄₀ in the Visible and Near Infrared Range: Intra- and Intercenter Optical Transitions in the V-Mo-Cluster. Spectrochimica Acta A 58 (1), pp. 1 - 15 (2002)

Yang, X.; Ahmad, R.; Melsheimer, J.; Klose, B. S.; Jentoft, F. C.: In Situ Spectroscopic Study of Isomerisation of Light Alkanes over Sulfated Zirconia Catalysts. In: Proceedings of the DGMK-Conference 'Chances for Innovative Processes at the Interface between Refining and Petrochemistry', pp. 217 - 224 (Eds. Emig, G.; Gallei, E.; Lücke, B.; Weitkamp, J.). DGMK Conference 'Chances for Innovative Processes at the Interface between Refining and Petrochemistry', Berlin, September 09, 2002 - September 11, 2002. DGMK, Hamburg (2002)

Jentoft, F. C.; Hahn, A. H. P.; Jentoft, R. E.; Ressler, T.; Tzolova-Müller, G.; Ahmad, R.; Schlögl, R.: Effect of Promoters Mn and Fe on Sulfated Zirconia Isomerization Catalysts. European Laboratory for Surface Science and Catalysis (ELCASS), 2nd annual meeting, Messina, Italy (2003)

Jentoft, F. C.; Klose, B. S.; Hahn, A. H. P.; Jentoft, R. E.; Ressler, T.; Ahmad, R.; Melsheimer, J.; Yang, X.; Schlögl, R.: Role of Bulk Phase in Sulfated Zirconia Catalysts. 18^th North American Catalysis Society Meeting, Cancun, Mexico (2003)

Wrabetz, S.; Ahmad, R.; Hahn, A. H. P.; Melsheimer, J.; Jentoft, F. C.: Adsorption und Reaktion von Alkanen an Zirconiumdioxidkatalysatoren. 101. Hauptversammlung der Deutschen Bunsen-Gesellschaft für Physikalische Chemie, Potsdam, Germany (2002)

Standke, M.; Breitkopf, C.; Papp, H.; Wrabetz, S.; Yang, X.; Ahmad, R.; Jentoft, R. E.; Jentoft, F. C.; Li, X.; Simon, L. J. et al.; Lercher, J. A.: A comparison of two special sulfated zirconia samples: characterization & interaction with alkanes. XXXV. Jahrestreffen Deutscher Katalytiker, Weimar (2002)

Jentoft, F. C.; Tzolova-Müller, G.; Ahmad, R.; Melsheimer, J.; Wrabetz, S.; Yang, X.; Schlögl, R.; Breitkopf, C.; Papp, H.: Analysis of Sites and Deposits on Sulfated Zirconia during and after Alkane Isomerization by In Situ UV-vis Spectroscopy, Temporal Analysis of Products and Calorimetry. 13th International Congress on Catalysis, Paris/France (2004)

Ahmad, R.; Melsheimer, J.; Yang, X.; Tzolova-Müller, G.; Jentoft, F. C.: Comparison of Tetragonal and Ordered Mesoporous Sulfated ZrO₂: Alkane Isomerization Studied by In Situ DR UV-vis Spectroscopy. Europacat-VI, Innsbruck / Austria (2003)

Melsheimer, J.; Ahmad, R.; Yang, X.; Jentoft, F. C.: Correlation of UV/Vis Features and Reaction Profile during Alkane Isomerization on Ordered Mesoporous and Tetragonal Sulfated ZrO₂. XXXVI. Jahrestreffen Deutscher Katalytiker, Weimar (2003)

Melsheimer, J.; Thiede, M.; Ahmad, R.; Jentoft, F. C.: Improved experimental setup for in situ UV-vis-near-IR spectroscopy under catalytic conditions. International Congress on Operando Spectroscopy, Lunteren, Netherlands (2003)

Yang, X.; Ahmad, R.; Melsheimer, J.; Klose, B. S.; Jentoft, F. C.: In Situ Spectroscopic Study of Isomerisation of Light Alkanes over Sulfated Zirconia Catalysts. DGMK Conference 'Chances for Innovative Processes at the Interface between Refining and Petrochemistry', Berlin (2002)

Wrabetz, S.; Yang, X.; Ahmad, R.; Hahn, A. H. P.; Jentoft, F. C.: Adsorption of Alkanes on Isomerisation Catalysts. SETARAM Calvet Calorimeters Users Club, Berlin (2002)

Melsheimer, J.; Kröhnert, J.; Ahmad, R.; Klokishner, S.; Jentoft, F. C.: Influence of the gas atmosphere and temperature on the UV/VIS absorption bands and the band gap energies of H_4-xCs_xPVMo₁₁O₄₀ (x = 0, 2): experiment and theory. The Third Jordanian International Conference of Chemistry, Irbid, Jordan (2002)

Ahmad, R.; Melsheimer, J.; Jentoft, F. C.: In situ diffuse reflectance UV/Vis spectroscopy investigations of alkane activation catalyzed by sulfated zirconia. XXXV. Jahrestreffen Deutscher Katalytiker, Weimar (2002)

Klokishner, S.; Melsheimer, J.; Kröhnert, J.; Ahmad, R.; Jentoft, F. C.; Schlögl, R.: Studies of UV/Vis/near-IR bands of H_4-xCs_xPVMo₁₁O₄₀ (x=0,2) compounds in dependence upon temperature and gas atmosphere. XXXV. Jahrestreffen Deutscher Katalytiker, Weimar, Germany (2002)

Ahmad, R.; Melsheimer, J.; Jentoft, F. C.; Schlögl, R.: Investigation of influence of Fe content in Fe-promoted zirconia: UV/Vis/near-IR spectroscopy and conversion of n-butane. 5^th European Congress on Catalysis: EUROPACAT V, Limerick, Ireland (2001)