Patent ID: 9573094
Date: 2017-02-21
CPC Classifications: B01D,B01J,C01B,C07C,Y02E

Claim:
1. A method for temperature control in a multi-stage reactively driven oxygen transport membrane based reactor comprising the steps of: introducing a flow of a heated oxygen containing feed stream to the multi-stage reactively driven oxygen transport membrane based reactor, the heated oxygen containing feed stream having a temperature from about 800° C. to about 1000° C.; passing the heated oxygen containing feed stream across the surfaces of a plurality of oxygen transport membrane elements in a first stage of the multi-stage reactively driven oxygen transport membrane based reactor wherein the some oxygen is depleted from the heated oxygen containing feed stream to produce a first residual stream at a temperature at or above the heated oxygen containing feed stream temperature; passing the first residual stream through a first refractory air diffusion screen disposed proximate a distal end of the first stage of the multi-stage reactively driven oxygen transport membrane based reactor and configured to maintain an operating temperature in the first stage of the multi-stage reactively driven oxygen transport membrane based reactor and allow the first residual stream to pass therethrough; passing the first residual stream across the surfaces of a second plurality of oxygen transport membrane elements in a second stage of the multi-stage reactively driven oxygen transport membrane based reactor wherein the some oxygen is further depleted from the first residual stream to produce a second residual stream; passing the second residual stream through a second refractory air diffusion screen disposed proximate a distal end of the second stage of the multi-stage reactively driven oxygen transport membrane based reactor and configured to maintain an operating temperature in the second stage of the multi-stage reactively driven oxygen transport membrane based reactor and allow the second residual stream to pass therethrough; and exhausting a stream containing some or all of the second residual stream from the multi-stage reactively driven oxygen transport membrane based reactor; wherein the operating temperature in the first stage and the operating temperature in the second stage are within about 25° C. of each other.