Abstract
Gas-phase hydrogenation of o-xylene to cis- and trans-dimethylcyclohexane (DMCH) was studied in a differential microreactor at atmospheric pressure and 430-520K over a Ptγ-Al2O3 catalyst. Rapid reversible deactivation of the freshly reduced catalyst prompted reactivation before every kinetic measurement and extrapolation of the steady-state activity to initial activity. Reaction orders were close to zero for o-xylene and ranged from 1.5 (430 K) to 3.0 (520 K) for hydrogen. A rate maximum for the production of the saturated compounds was observed at about 460 K. The results were in line with previously reported results on xylene hydrogenation on Ni/γ-Al2O3 catalyst.
Original language | English |
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Pages (from-to) | 271-278 |
Number of pages | 8 |
Journal | Chemical Engineering Journal |
Volume | 91 |
Issue number | 2-3 |
DOIs | |
Publication status | Published - 15 Mar 2003 |
MoE publication type | A1 Journal article-refereed |
Keywords
- Deactivation
- Kinetic modeling
- o-Xylene hydrogenation
- Pt/γ-AlO