Publications of Rafat Ahmad
All genres
Journal Article (5)
2003
Journal Article
Ahmad, Rafat, Jörg Melsheimer, Friederike C. Jentoft and Robert Schlögl: 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 Article
, , Rafat Ahmad, Friederike C. Jentoft, , and : Reaction Pathways in n-Pentane Conversion Catalyzed by Tungstated Zirconia: Effects of Platinum in the Catalyst and Hydrogen in the Feed.
Journal Article
Melsheimer, Jörg, Manfred Thiede, Rafat Ahmad, Genka Tzolova-Müller and Friederike C. Jentoft: Improved experimental setup for in situ UV-vis-NIR spectroscopy under catalytic conditions.
2002
Journal Article
, Jörg Melsheimer, Rafat Ahmad, Friederike C. Jentoft, Gerhard Mestl and Robert Schlögl: 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.
Journal Article
Melsheimer, Jörg, Jutta Kröhnert, Rafat Ahmad, , Friederike C. Jentoft, Gerhard Mestl and Robert Schlögl: UV/Vis/near-IR spectroscopic characteristics of H4-xCsxPVMo11O40 (x=0,2) catalyst under different temperatures and gas atmospheres.
Conference Paper (1)
2002
Conference Paper
Yang, Xiaobo, Rafat Ahmad, Jörg Melsheimer, Barbara S. Klose and Friederike C. Jentoft: 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, Sep 2002).
Talk (4)
2003
Talk
Jentoft, Friederike C., Alexander H.P. Hahn, Rolf E. Jentoft, Thorsten Ressler, Genka Tzolova-Müller, Rafat Ahmad and Robert Schlögl: Effect of Promoters Mn and Fe on Sulfated Zirconia Isomerization Catalysts.
(European Laboratory for Surface Science and Catalysis (ELCASS), 2nd annual meeting, Messina, Italy, Nov 2003).
Talk
Jentoft, Friederike C., Barbara S. Klose, Alexander H.P. Hahn, Rolf E. Jentoft, Thorsten Ressler, Rafat Ahmad, Jörg Melsheimer, Xiaobo Yang and Robert Schlögl: Role of Bulk Phase in Sulfated Zirconia Catalysts.
(18th North American Catalysis Society Meeting, Cancun, Mexico, Jun 2003).
2002
Talk
, , , Sabine Wrabetz, Xiaobo Yang, Rafat Ahmad, Rolf E. Jentoft, Friederike C. Jentoft, , and : A comparison of two special sulfated zirconia samples: characterization & interaction with alkanes.
(XXXV. Jahrestreffen Deutscher Katalytiker, Weimar, Mar 2002).
Talk
Wrabetz, Sabine, Rafat Ahmad, Alexander H.P. Hahn, Jörg Melsheimer and Friederike C. Jentoft: Adsorption und Reaktion von Alkanen an Zirconiumdioxidkatalysatoren.
(101. Hauptversammlung der Deutschen Bunsen-Gesellschaft für Physikalische Chemie, Potsdam, Germany, May 2002).
Poster (14)
2004
Poster
Jentoft, Friederike C., Genka Tzolova-Müller, Rafat Ahmad, Jörg Melsheimer, Sabine Wrabetz, Xiaobo Yang, Robert Schlögl, and : 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, Jul 2004).
2003
Poster
Ahmad, Rafat, Jörg Melsheimer, Xiaobo Yang, Genka Tzolova-Müller and Friederike C. Jentoft: Comparison of Tetragonal and Ordered Mesoporous Sulfated ZrO2: Alkane Isomerization Studied by In Situ DR UV-vis Spectroscopy.
(Europacat-VI, Innsbruck / Austria, Aug 2003).
Poster
Melsheimer, Jörg, Rafat Ahmad, Xiaobo Yang and Friederike C. Jentoft: Correlation of UV/Vis Features and Reaction Profile during Alkane Isomerization on Ordered Mesoporous and Tetragonal Sulfated ZrO2.
(XXXVI. Jahrestreffen Deutscher Katalytiker, Weimar, Mar 2003).
Poster
Melsheimer, Jörg, Manfred Thiede, Rafat Ahmad and Friederike C. Jentoft: Improved experimental setup for in situ UV-vis-near-IR spectroscopy under catalytic conditions.
(International Congress on Operando Spectroscopy, Lunteren, Netherlands, Mar 2003).
2002
Poster
Ahmad, Rafat, Jörg Melsheimer and Friederike C. Jentoft: In situ diffuse reflectance UV/Vis spectroscopy investigations of alkane activation catalyzed by sulfated zirconia.
(XXXV. Jahrestreffen Deutscher Katalytiker, Weimar, Mar 2002).
Poster
, Jörg Melsheimer, Jutta Kröhnert, Rafat Ahmad, Friederike C. Jentoft and Robert Schlögl: Studies of UV/Vis/near-IR bands of H4-xCsxPVMo11O40 (x=0,2) compounds in dependence upon temperature and gas atmosphere.
(XXXV. Jahrestreffen Deutscher Katalytiker, Weimar, Germany, Mar 2002).
Poster
Melsheimer, Jörg, Jutta Kröhnert, Rafat Ahmad, and Friederike C. Jentoft: Influence of the gas atmosphere and temperature on the UV/VIS absorption bands and the band gap energies of H4-xCsxPVMo11O40 (x = 0, 2): experiment and theory.
(The Third Jordanian International Conference of Chemistry, Irbid, Jordan, Apr 2002).
Poster
Wrabetz, Sabine, Xiaobo Yang, Rafat Ahmad, Alexander H.P. Hahn and Friederike C. Jentoft: Adsorption of Alkanes on Isomerisation Catalysts.
(SETARAM Calvet Calorimeters Users Club, Berlin, Jun 2002).
Poster
Yang, Xiaobo, Rafat Ahmad, Jörg Melsheimer, Barbara S. Klose and Friederike C. Jentoft: 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, Sep 2002).
2001
Poster
Ahmad, Rafat, Jörg Melsheimer, Friederike C. Jentoft and Robert Schlögl: Investigation of influence of Fe content in Fe-promoted zirconia: UV/Vis/near-IR spectroscopy and conversion of n-butane.
(5th European Congress on Catalysis: EUROPACAT V, Limerick, Ireland, Sep 2001).