초록 ▼

A catalytic process for the reduction to elemental sulfur of the sulfur dioxide contained in gas streams using a reducing gas such as hydrogen, or preferably carbon monoxide, in a reactor charged with a material represented by the general formula MIIM2 IIIO4 crystallized in the spinel structure wher

A catalytic process for the reduction to elemental sulfur of the sulfur dioxide contained in gas streams using a reducing gas such as hydrogen, or preferably carbon monoxide, in a reactor charged with a material represented by the general formula MIIM2 IIIO4 crystallized in the spinel structure wherein MII is a divalent metal and MIII is a trivalent metal from the first transition period of the Periodic Table of the Elements, or derivatives of the materials of the above formula resulting from pretreatment with hydrogen or, preferably carbon monoxide, and/or exposure to the sulfur dioxide-containing gas stream.

대표청구항 ▼

A process for removing sulfur dioxide from a gas stream containing sulfur dioxide and a reducing gas selected from the group consisting of hydrogen and carbon monoxide comprising the steps of: heating the gas stream to an elevated temperature, passing the heated gas stream through a reaction chamber

A process for removing sulfur dioxide from a gas stream containing sulfur dioxide and a reducing gas selected from the group consisting of hydrogen and carbon monoxide comprising the steps of: heating the gas stream to an elevated temperature, passing the heated gas stream through a reaction chamber initially charged with material of composition of the general formula MIIM2IIIO4 crystallized in the spinel structure, wherein MII is a divalent metal and MIII is a trivalent metal from the first transition period of the Periodic Table of Elements, whereby said sulfur dioxide and said reducing gas react on the surface of said material to produce among the reaction products elemental sulfur, and thereafter separating said elemental sulfur from the reaction product stream.