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Hydroisomerization of long-chain paraffins over nano-sized bimetallic Pt–Pd/H-beta catalysts
| Content Provider | Semantic Scholar |
|---|---|
| Author | Bauer, Frank Ficht, Karsten Bertmer, Marko Einicke, Wolf-Dietrich Kuchling, Thomas Gläser, Roger |
| Copyright Year | 2014 |
| Abstract | The hydroisomerization of long-chain n-paraffins was studied in the temperature range of 205–230 °C at pH2 = 50 bar using a pilot-scale trickle-bed continuous-flow reactor over bimetallic catalysts consisting of mixtures of platinum and palladium supported on commercially available nano-sized zeolite beta (nSi/nAl = 12.5 and 25, respectively) extruded with an alumina binder. For n-hexadecane conversion, high yields of isomers (25 and 45 wt.% of mono- and multibranched isomers, respectively) without extensive cracking (>10 wt.%) were obtained at a conversion of 80%. Long-term tests with n-hexadecane and blends of solid n-paraffins for 30–60 days on-stream clearly indicate that a minor loss in catalyst activity can easily be compensated for by increasing the reaction temperature from 220 °C to 225 °C. The zeolite with a “mild acidity” exhibits a low hydrocracking activity with isomerization yields of up to 70 wt.% and high stability over more than 60 days on-stream. Carbonaceous deposits formed during n-paraffin hydroisomerization were investigated by elemental analysis, TGA, ATR-FTIR and 13C MAS NMR spectroscopy, showing the formation of hydrogen-rich coke which leads to pore blocking. |
| Starting Page | 4045 |
| Ending Page | 4054 |
| Page Count | 10 |
| File Format | PDF HTM / HTML |
| DOI | 10.1039/C4CY00561A |
| Alternate Webpage(s) | https://pubs.rsc.org/en/content/articlepdf/2014/CY/C4CY00561A |
| Alternate Webpage(s) | http://chglib.icp.ac.ru/subjex/2015/pdf01/CatalSciTechnol-2014-4()4045.pdf |
| Alternate Webpage(s) | https://doi.org/10.1039/C4CY00561A |
| Volume Number | 4 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
