Abstract
Parahydrogen-induced polarization has been successfully used for a
kinetic study of propylene hydrogenation over a Pt/Al2O3 catalyst. It was shown that
the reaction orders with respect to hydrogen are different for the pairwise and the
non-pairwise hydrogen addition and are equal to 0.7 and 0.1, respectively. This
observation of different reaction orders confirms the coexistence of different types
of active sites which are responsible for the overall and the pairwise hydrogen
addition to the propylene C=C double bond. Moreover, 0.7 reaction order with
respect to H2 for pairwise hydrogen addition indicates that the contribution of
pairwise addition depends on the concentration of molecular hydrogen. Therefore,
this observation can be developed into a practical tool for producing fluids with
highly polarized nuclear spins by changing the hydrogen concentration.
Original language | English |
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Pages (from-to) | 279-288 |
Number of pages | 12 |
Journal | Applied Magnetic Resonance |
Volume | 44 |
DOIs | |
Publication status | Published - 2013 |