NOVELTY - The feed nozzle assembly comprises: an outer tube (3) extending between a first liquid feed inlet and a nozzle outlet (7); an inner tube with a downstream section having a gas outlet; and a third tube with one end connected to a second liquid feed inlet and an opposite end with an outlet that is positioned within an annular conduit (13) upstream the gas outlet. The downstream section of the inner tube is arranged within the outer tube to define the annular conduit. The nozzle outlet of the outer tube is downstream in line with the gas outlet of the inner tube.    USE - The feed nozzle assembly such as a side entry feed nozzle assembly is useful for feeding a gas and a liquid into a catalytic cracking reactor vessel (all claimed), where: the reactor is a fluid catalytic cracking reactor and useful for producing hydrocarbon fuels from biomass; the gas includes dispersion gas such as steam; the liquid includes hydrocarbon feed such as fluid biomass or hydrocarbon fraction such as crude oil or a heavy petroleum; and the fluid biomass includes a fluid biomass material such as agriculture waste, forest residue, wood chips, straw, chaff, grain, grasses, corn, corn husks, weeds, aquatic plants, hay, cellulose containing biological material or material of biological origin and a pyrolysis oil.    ADVANTAGE - The feed nozzle assembly enables combined cracking of different hydrocarbon feeds without requiring costly modifications of the lift pot assembly and the riser or other parts of the cracking reactor.    DETAILED DESCRIPTION - The feed nozzle assembly comprises: an outer tube (3) extending between a first liquid feed inlet and a nozzle outlet (7); an inner tube with a downstream section having a gas outlet; and a third tube with one end connected to a second liquid feed inlet and an opposite end with an outlet that is positioned within an annular conduit (13) upstream the gas outlet. The downstream section of the inner tube is arranged within the outer tube to define the annular conduit. The nozzle outlet of the outer tube is downstream in line with the gas outlet of the inner tube. The third tube is: parallel to the inner tube; connected to a tube bend crossing the wall of the outer tube; and a part of an array of parallel tubes in the annular conduit. The inlet of the third tube is operatively connected to a supply of a hydrocarbon feed, a fluid biomass containing feed or a sour water. The inner tube is connected to a supply of a dispersion gas. The outer tube is connected to a supply of a liquid hydrocarbon fraction. The third tube is operatively connected to a supply of a purging gas. An INDEPENDENT CLAIM is included for a catalytic cracking process.    DESCRIPTION OF DRAWING(S) - The figure shows a schematic longitudinal section view of a feed nozzle assembly.    Inner tube (2)    Outer tube (3)    Liquid inlet (6)    Nozzle outlet (7)    Annular conduit. (13)