A small flow reactor (5 ml volume) is used for continuous hydrogenatio
n in supercritical CO2 or propane with polysiloxane-supported noble me
tal catalysts; a wide range of organic functionalities can be hydrogen
ated with good throughput (up to 1200 ml h(-1) in favourable cases) an
d the various parameters (temperature, pressure, concentration of H-2,
etc.) can be controlled independently to optimise the selectivity for
a particular product.