Reactor system and process for upgrading heavy hydrocarbonaceous material

A hydrocracking reactor system for upgrading hydrocarbonaceous material into hydrocarbons, the hydrocracking reactor system comprising:

• a reactor vessel;
• a first inlet for receiving a liquid feedstock pre-mixed with a catalyst, the first inlet in communication with top of the reactor vessel;
• a second inlet for receiving a gaseous feed primarily comprising hydrogen, the second inlet in communication with bottom of the reactor vessel;
• a spray arrangement including:
• a plurality of nozzles configured to disperse the liquid feedstock pre-mixed with the catalyst from the top of the reactor vessel to obtain dispersed droplets having a predetermined droplet size less than 500 μm, and
• a plurality of concentric pipes for receiving the liquid feedstock pre-mixed with the catalyst from the first inlet, wherein the plurality of concentric pipes are arranged across a top cross-section of the reactor vessel, and wherein each of the plurality of concentric pipes has same center;
• a sparger arrangement including a plurality of sparger holes to introduce the gaseous feed comprising hydrogen from the bottom of the reactor vessel to form a continuous gaseous phase throughout a cross-section of the reactor vessel;
• a top exit in communication with the top of the reactor vessel for removing at least a top portion of reaction effluent from the reactor vessel, wherein the reaction effluent comprising one or more hydrocarbons formed during contact of the dispersed droplets with the continuous gaseous phase throughout the cross-section of the reactor vessel;
• and
• a bottom exit in communication with the bottom of the reactor vessel for removing at least a bottom portion of the reaction effluent from the reactor vessel.