Gas and liquid distributor for bubble column reactor

A bubble column reactor assembly (100) comprising:

• a reactor vessel (104) comprising a bottom end and a top end;
• a pre-distributor plate (150) for gas-liquid distribution, the pre-distributor plate (150) disposed in the reactor vessel (104) at a pre-determined height above the bottom end of the reactor vessel (104), wherein the pre-distributor plate (150) has a bottom surface and a top surface opposite to the bottom surface, wherein the bottom surface faces the bottom end of the reactor vessel (104), wherein the pre-distributor plate (150) comprises:
• a plurality of perforations (206), wherein each perforation (206) of the plurality of perforations (206) comprises:
• a duct (170) projecting from the bottom surface of the pre-distributor plate (150) towards the bottom end of the reactor vessel (104);
• and
• a cap (180) disposed on the bottom surface of the pre-distributor plate (150) enclosing the duct (170) and the perforation (206), wherein the cap (180) comprises a plurality of openings (210) disposed around a surface of the cap (180);
• and
• a gas distributor (110) disposed below the pre-distributor plate (150) to receive gas for injecting gas into the liquid prior to distribution of gas and the liquid by the pre-distributor plate (150).