The custom-tailored pore structure includes optimum levels of micro, meso and macropores, thereby providing maximum access to active sites while minimizing sulfur deposition (condensation) during normal operations. RXSOL CC 3S Activated Alumina Claus Catalyst meso and macropores aid in the diffusion of the reactants into, and the large sulfur molecules away from, active sites. RXSOL CC 3S Activated Alumina Claus Catalyst has ideal pore distribution for use in sub-dewpoint tail gas processes such as CBA, MCRC and Sulfreen. RXSOL CC 3S Activated Alumina Claus Catalyst  is particularly well suited for use in sulfur recovery processes operated near or below the sulfur dewpoint. The third reactor of a Claus unit can be operated closer to the sulfur dewpoint to enhance sulfur recovery.