Method and design of multiple counterrotating unit reactor

A method for separating a fluid stream into a liquid phase and a gas phase, comprising:

• providing the fluid stream to a rotating packed bed arrangement;
• inserting the fluid stream into the packed bed arrangement;
• rotating a first set of discs within a casing of the packed bed arrangement in a first direction;
• rotating a second set of discs with the casing of the packed bed arrangement in a second direction, wherein the first direction and the second direction are counterrotating, wherein the fluid stream contacts both the first set of discs and the second set of discs, wherein the first and second sets of discs are coupled to respective first and second shafts arranged in a nested shaft assembly, wherein the nested shaft assembly comprises a plurality of fluid ports at a respective plurality of axial positions, wherein each fluid port of the plurality of fluid ports is configured to route a flow into one or more flow paths of a plurality of flow paths between the first and second sets of discs;
• separating the fluid stream into the liquid phase and the gas phase through contact of the fluid stream with the first set of discs and second set of discs;
• and
• discharging the liquid phase and the gas phase from the rotating packed bed arrangement.