1.

Hydrogenation of CO [sub] 2 and CO under high temperature gradient between catalyst surface and opposite cooling plate

Methanol synthesis was carried out at 25 bar in slit formed by two parallel plates 5 mm apart. Upper plate was covered by catalyst layer and heated up to 250 °C, whereas lower one was kept at about 30C. Reaction stream in laminar flow consisted of H2, CO2, and CO in concentration range usually encountered in industrial processes. Catalyst layer was prepared by spraying CuO/ZnO/Al2O3/V2O3 slurry on SS-plate. Continuous removal of methanol and water by condensation on the cool surface shifted equilibrium toward products formation. At isothermal conditions with no temperature gradient in slit, total carbon conversion approached the thermodynamic equilibrium when residence time was long enough. Experiments with high temperature difference showed total carbon conversion much larger compared to the thermodynamic one calculated at plate-catalyst temperature. Three-dimensional model predicted total carbon conversion for both isothermal and high temperature gradient operation reasonably well.

B.03 Paper at an international scientific conference

COBISS.SI-ID: 5212698

2.

Current status of hydrogen and fuel cell technologies in Slovenia

A short historical description of research activities on the fuel cells and hydrogen production in Slovenia is provided. Particular attention is given to the electrocatalytic activity of platinum

F.18 Transfer of new know-how to direct users (seminars, fora, conferences)

COBISS.SI-ID: 5323546

3.

Lumped kinetic model for catalytic hydrodeoxygenation of liquefied lignocellulosic biomass in a slurry reactor

Raw residual wood biomass, containing cellulose, hemicellulose and lignin, was liquefied at low temperature by ultrasound-assisted solvolysis and acidolysis by glycerol, diethylene glycol and p-toluenesulfonic acid. Liquefied biomass was consequently upgraded by hydrotreatment utilizing heterogeneous catalysis over NiMo/Al2O3 bifunctional catalyst. Effects of temperature (200−350 °C), heating rate (2.5–10.0 K min−1), hydrogen/nitrogen pressure (2−8 MPa), mixing (250−1000 min−1), hydrogen donor solvent (tetralin) and catalyst contents on deoxygenation were established. Chemical kinetics of hydrodeoxygenation (HDO), decarbonylation and decarboxylation were determined by originally developed lumped model, based on reaction mechanisms and pathways, while the external mass transfer resistance proved to be negligible under the applied hydrodynamic conditions.

F.13 Development of new production methods and tools or processes

COBISS.SI-ID: 36583173