A Model For Predicting Deactivation Of A Catalytic Claus Reactor By Adsorption Of Sulphur

The use of "cold-bed" temperatures in Claus process catalytic reactors enables attainment of very high conversions of H 2 S to elemental sulphur but at the expense of deactivation of the catalyst by 2 adsorbed sulphur. This results in a deactivation profile which moves along the bed axis, and which eventually breaks through the bed at excessive times on stream. A kinetic model of this process has been used to simulate the behaviour of such a cold-bed reactor. The simulation predicts low rates of deactivation and a breakthrough capacity for a typical catalyst bed of the order of several days.