Catalytic liquid-phase hydrogenation of aqueous nitrate solutions: A kinetic investigation
- National Inst. of Chemistry, Ljubljana (Slovenia)
- Tokyo Inst. of Technology, Yokohama (Japan)
Liquid-phase reduction using a solid Pd/Cu bimetallic catalyst provides a potential technique for the removal of nitrates from waters. Kinetic measurements were performed in an isothermal semi-batch slurry reactor operating at atmospheric pressure. The proposed intrinsic rate expression for nitrate disappearance is based on the conventional Langmuir-Hinshelwood kinetic approach, considering both equilibrium nitrate as well as dissociative hydrogen adsorption processes to different types of active sites, and assuming an irreversible bimolecular surface reaction between adsorbed reactant species to be the rate-controlling step. The apparent activation energy for catalytic liquid-phase nitrate reduction and the heat of nitrate adsorption, in the temperature range 280.5-293 K, were found to be 47 and -22 kJ/mol, respectively. 6 refs., 3 figs.
- OSTI ID:
- 416435
- Report Number(s):
- CONF-960730--
- Country of Publication:
- United States
- Language:
- English
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