An enriched air stove having a combustion surface for supporting solid fuel for combustion and an oxygen enriched air intake fluidly connected to the combustion surface to provide an oxygen enriched air source. The combustion surface can be a baseplate comprising a plurality of apertures fluidly connected to an air mixing chamber to mix atmospheric air and enriched oxygen to assist combustion of the solid fuel.

A process for oxidizing a sulfur stream includes supplying at least one sulfur stream into a furnace; supplying oxygen-enriched combustion air into the furnace; separately supplying pure oxygen into the furnace; and at least partially oxidizing the at least one sulfur stream in the furnace. A related apparatus is also provided and includes a furnace; an inlet for supplying at least one sulfur stream into the furnace; an inlet for supplying a stream of an oxygen-enriched combustion air into the furnace; and an inlet for supplying a pure oxygen stream into the furnace separately from the supplying of the oxygen-enriched combustion air.