Abstract: Described is a control process for oxidation air management in a sulfur recovery unit. The sulfur recovery unit includes a gas feedstock inlet, an oxidation air inlet, a reaction furnace, pre-heaters, a Claus section including multiple sulfur condensers and Claus converters, and a SuperClaus section including a catalyzing SuperClaus converter, a SuperClaus sulfur condenser, and an SuperClaus oxidation air flow control valve. The control process includes analyzing one or more parameters in the sulfur recovery unit to determine a switch from the SuperClaus section to the Claus section. Additionally, conditions in the sulfur recovery unit are continuously monitored so that when a condition reaches a predetermined threshold or range, the SuperClaus oxidation air flow control valve to the SuperClaus section is opened.