The ease with which residence time could be adjusted, the absence of moving parts, higher values of heat and mass transfer coefficient are the attractive features of bubble columns, hence are widely used for conducting several mass transfer operations/chemical reactions. However selection of sparger design and type is crucial and it affects performance of the reactor implicitly and explicitly. The Part I of this work addressed the roles of various parameters to be considered while designing the sparger for bubble column reactors. The second part, deals with the selection of optimum design and type of the sparger for several designs of bubble column, i.e., effect of column diameter, aspect ratio, operating pressure and volumetric flow rate of gas phase. (C) 2011 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.