The present invention relates to a gas-liquid-solid (GLS) process comprising contacting reactants on a solid foam material, wherein the solid foam material has a surface to volume ratio of at least 250 m2/m3. This foam material may include a catalyst composition or a catalyst material may be supported on the foam material. The foam material proyides improved mass transfer and favourable hydrodynamic parameters when compared to conventional packings so that an enhanced contact between reactants and an improved reactor performance is achieved
