Axens is an international provider of advanced technologies, catalysts, adsorbents and services, with a global reputation for basic engineering design excellence Axens is an international provider of advanced technologies, catalysts, adsorbents and services, with a global reputation for basic engineering design excellence. The main scope of Axens'' business is focused on the conversion of oil, coal, natural gas and biomass to clean fuels as well as the production and purification of major petrochemical intermediates.