公开(公告)号：US10195565B2

公开(公告)日：2019-02-05

申请号：US15539257

申请日：2015-12-23

Applicant: PROSERNAT

Inventor： Michael Heisel ,  Benoit Mares

IPC: C10L3/10 ,  C01B17/04 ,  B01D53/52 ,  B01D53/86 ,  B01D53/90

Abstract: A process for the removal of hydrogen sulfide and sulfur recovery from a H2S-containing gas stream by catalytic direct oxidation and Claus reaction through two or more serially connected catalytic reactors, wherein a specific control of the oxygen supplement is operated. The control and improvement of the process is obtained by complementing, in each major step of the process, the H2S-containing gas stream by a suitable flow of oxygen, namely before the H2S-containing gas stream enters the Claus furnace, in the first reactor of the process and in the last reactor of the process. Especially in application in a SubDewPoint sulfur recovery process the H2S/SO2 ratio is kept constant also during switch-over of the reactors R1 and R by adding the last auxiliary oxygen containing gas directly upstream the last reactor R so that the H2S/SO2 ratio can follow the signal of the ADA within a few seconds.