METHOD FOR PRODUCTION OF SULFUR AND SULFURIC ACID

The present invention relates to a process plant and a process for production of sulfur from a feedstock gas comprising from 15%, 20%, 30 vol%, 40 vol% or 50% to 99 vol% or 100 vol% H2S and a stream of sulfuric acid involving the steps of a. providing a Claus reaction furnace feed stream comprising said feedstock gas, an amount of sulfuric acid, an amount of oxygen and optionally an amount of fuel, wherein the amount of oxygen is substoichiometric, b. directing said Claus reaction furnace feed stream to a Claus reaction furnace operating at elevated temperature, such as above 900?C, providing a Claus converter feed gas c. cooling said Claus converter feed gas to provide a cooled Claus converter feed gas and optionally withdrawing elemental sulfur from the gas d. directing said cooled Claus converter feed gas to contact a material catalytically active in the Claus reaction, e. withdrawing a Claus tail gas and elementary sulfur, optionally by cooling the effluent from said material catalytically active in the Claus reaction, f. directing a stream comprising said Claus tail gas to a Claus tail gas treatment, wherein said sulfuric acid directed to said Claus reaction furnace being in the form of droplets with a droplet size distribution characterized by 90% of the mass of the droplets having a diameter below 500 ?m, 200 ?m or 100 ?m with the associated benefit of such a process efficiently converting all liquid H2SO4 to gaseous H2SO4 and further to SO2, which is well suited for a Claus process.