CHARACTERIZATION OF REACTION BETWEEN ZNO AND COS

In order to understand the behavior of COS in a ZnO desulfurization re actor, the reaction between ZnO and COS was studied in the presence of gases which compose a coal-derived gas. The behavior of COS in the re action zone of a ZnO packed bed can be predicted as follows: H2S in co al-derived gas reacts more easily with ZnO than COS; most of COS is co nverted to H2S by catalytic hydrolysis and then reacts with ZnO, altho ugh a part of COS may react directly with ZnO; H-2 accelerates the con version of COS to H2S; the water-gas shift reaction accelerates the re action between ZnO and COS; and CO2 does not affect the reaction.