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The influence of the chlorine content on the bimetallic particle formation in Pt–Re/Al2O3 studied by STEM/EDX, TPR, H2 chemisorption and model reaction studies |
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| Authors: | T Gjervan R Prestvik B Ttdal C E Lyman A Holmen |
| Affiliation: | a Department of Chemical Engineering, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway b SINTEF Applied Chemistry, 7465 Trondheim, Norway c Department of Physics, Norwegian University of Science and Technology (NTNU), 7491 Trondheim, Norway d Department of Materials Science and Engineering, Lehigh University, Bethlehem, PA 18015, USA |
| Abstract: | A Pt–Re/Al2O3 reforming catalyst with different levels of chlorine content prior to reduction has been studied by various techniques such as combined STEM/EDX, TPR, H2 chemisorption and model reactions in order to investigate the effect of the chlorine content on the bimetallic particle formation. TPR, H2 chemisorption and model reactions show that chlorine inhibits the formation of bimetallic particles in the Pt–Re/Al2O3 catalyst. The effect of chlorine is, however, limited. Direct measurements by STEM/EDX analysis could not reveal any significant differences in alloy formation by varying the chlorine content from 0.6 to 1.5 wt.%. In comparison, the effect of adding water during reduction has a greater impact on the final state of the metal particles. |
| Keywords: | Pt–Re/Al2O3 catalyst Chlorine content STEM/EDX TPR Cyclopentane n-Butane |
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