PROCESS FOR REMOVAL OF HYDROGEN SULPHIDE, IRON PENTACARBONYLAND NICKEL TETRACARBONYL FROM A SYNTHESIS GAS STREAM

摘要

The invention provides a process for removal of hydrogen sulphide, iron p entacarbonyl and nickel tetracarbonyl from a feed synthesis gas stream, the process comprising the steps of: (a) removal of hydrogen sulphide and of iro n pentacarbonyl by contacting the feed synthesis gas stream with an absorbin g liquid comprising water, physical solvent and an amine, to obtain a synthe sis gas stream depleted of hydrogen sulphide and depleted of iron pentacarbo nyl; (b) adsorption of nickel tetracarbonyl by contacting the synthesis gas stream depleted of hydrogen sulphide and depleted of iron pentacarbonyl with solid adsorbent comprising activated carbon to obtain solid adsorbent enric hed in nickel tetracarbonyl and a purified synthesis gas stream.