IMPROVED CATALYST TUBES FOR ENDOTHERMIC REACTIONS, WITH SPECIAL REFERENCE TO THE CRACKING OF HYDROGEN SULFIDE TO PRODUCE HYDROGEN AND SULFUR

摘要

A catalyst tube for endothermic reactions suitable for high temperature endothermic reactions performed at temperature from 300 to 12000C for production of hydrogen and sulphur by the cracking of hydrogen sulphide or other products, comprises two feedstock patterns ad one product pattern, coaxial one to another, said pattern being obtained through three concentric tubes which define a first annular space wherein a catalyst bed is installed, an inner annulus where the reaction product is collected and a central circular tube wherein a second catalyst bed is installed in order to have the catalyst on both external and internal side of said annulus. The catalyst on the external side of said annulus is supported on metallic or ceramic foams having suitable form to avoid the problems due to the friction on the walls of the used conventional catalysts and to get an easy unloading and loading in the catalyst tubes.