In-Situ Replacement

CORMETECH's innovative In-Situ Catalyst Replacement SM (patent pending) process involves removing and replacing catalyst layer modules within a single reactor. The process is performed without removing the steel frame modules that support the catalyst thereby reducing the time and cost compared to conventional replacement methods. Prior to catalyst removal, a visual inspection or spot sampling is performed in conjunction with chemical and physical performance tests to pre-qualify the process for a given unit. The In-Situ method has been used to replace honeycomb catalysts and can be used on low surface area plate or corrugated SCR catalysts. The In-Situ method can be performed on an entire layer or partial layer of catalyst. In many plants, the In-Situ method can be more economical and efficient than conventional methods of catalyst replacement. Additional decision criteria include:

  • Improved catalyst performance is required
  • A compressed outage period is required
  • Eliminating the high cost and/or limited availability of cranes and other services needed for a traditional extract and install plan Reactor access is limited or the owner prefers to use existing entry doors.

CORMETECH's In-Situ Catalyst Replacement is successfully
operating at TVA's Allen Station Units 1, 2 and 3