Regenerating catalyst unit, for treating gas turbine waste gas, involves passing regeneration gas through two catalysts, removing gas upstream of one catalyst

Regenerating a catalyst unit having a SCOSOx-catalyst (2) and a SCONOX-catalyst (3) for removing SO2 and NOx from gas turbine waste gas downstream of the catalyst (2) involves passing regeneration gas through both catalysts; removing regeneration gas upstream of the catalyst (2) or between the two catalysts; and passing the removed gas between the two catalysts and/or upstream of the catalyst (2) whilst fresh regeneration gas is introduced downstream of catalyst (3). Process for regenerating a catalyst unit having a SCOSOx-catalyst (2) for removing SO2 from gas turbine waste gas and a SCONOX-catalyst (3) for removing NOx from gas turbine waste gas arranged downstream of the catalyst (2) comprises passing regeneration gas containing molecular hydrogen or hydrocarbons through both catalysts; removing regeneration gas upstream of the catalyst (2) or between the two catalysts; and passing the removed gas between the two catalysts and/or upstream of the catalyst (2) whilst fresh regeneration gas is introduced downstream of catalyst (3). An Independent claim is also included for a device for carrying out the process comprising a catalyst chamber (1) containing the SCOSOx-catalyst and the SCONOX-catalyst; a line (7) for introducing regeneration gas and a line (12) for removing regeneration gas. Preferred Features: Molecular hydrogen or hydrocarbons are added to the removed regeneration gas. Before that start of the regeneration, waste gas is driven from the catalyst chamber by rinsing with oxygen-free purifying gas. Zwecks Regeneration einer Katalysatoranlage zur Entfernung von SO¶2¶ und NO¶x¶ aus Abgas einer Gasturbine wird zwischen einem SCOSOx-Katalysator (2) und einem stromabwärts davon angeordneten SCONOx-Katalysator (3) ein z. B. molekularen Wasserstoff enthaltendes Regenerationsgas eingeleitet, stromaufwärts des SCOSOx-Katalysators (2) abgezogen und zur Verminderung des Bedarfs an Regenerationsgas rückgeführt und wieder eingeleitet. Zur Regeneration des SCONOx-Katalysators (3) wie auch zur Fernhaltung von rückgeführtem Regenerationsgas, welches im SCOSOx-Katalysator (2) SO¶2¶ aufgenommen hat, wird dabei stromabwärts des letzteren Regenerationsgas eingeleitet, welches nacheinander den SCONOx-Katalysator (3) und den SCOSOx-Katalysator (2) durchströmt. Die Strömungsrichtung durch den SCOSOx-Katalysator kann auch umgekehrt sein. Bei einer anderen Ausführungsform wird sowohl stromaufwärts des SCOSOx-Katalysators als auch stromabwärts des SCONOx-Katalysators Reg