method for modification of a einkreis - gasturbinenanlage, method for reuse of a catalyst and a reproduzierter catalyst

摘要

A method for economically modifying a gas turbine single plant into a combined cycle plant, a method for re-using a used high temperature denitration catalyst of the gas turbine single plant as an intermediate temperature denitration catalyst of other modified, existing or new plants and a re-produced catalyst are provided. The high temperature denitration catalyst of the gas turbine single plant contains TiO2, at least one of WO3 and MoO3 and V2O5 of 0.5 wt% or less, preferably 0.2 wt% or less or none of V2O5 and is optimized to be used in the temperature range up to maximum 450 to 600 DEG C. The used high temperature denitration catalyst is immersed into V-containing water solution and dried and/or burned. An intermediate temperature denitration catalyst is re-produced containing V2O5 component of 0.5 wt% or more, preferably 1.0 wt% or more, and being optimized to be used in the temperature range of 250 to 450 DEG C. This intermediate temperature denitration catalyst is re-used in the combined cycle plant after modified or other plants.