Benefits of SCR-Tech ReGen™ Process

Guarantees:

- Full restoration of original catalytic activity (K/Kn 0.9 after regeneration; if desired K/Kn 1)
- Same deactivation rate as new catalyst in the same SCR installation
- Low SO2 oxidation (SO2/SO3 conversion no higher than new catalyst guarantee)
- Removal of 99% of physical restrictions (fly ash plugging, large particle ash, blinding layers)
- No physical damage to the catalyst
- No loss of structural integrity

Significant cost savings:
- Avoids investment cost of new catalyst
- Avoids disposal cost of spent catalyst
- Avoids environmental costs / liabilities associated with land filling spent catalyst
- Potential for enhanced activity offers additional economic upside

Cost Savings
Catalyst regeneration could result in savings of millions of dollars annually for the average
coal-fired power generating facility, and will assure a reliable supply of catalyst is available
in the market. SCR-Tech offers catalyst regeneration for significantly less cost than
purchasing new catalyst.

Sample Cost Savings of Regeneration vs. Replacement

Table Assumptions:
– Typical 500 MW plant with 650 m3 of catalyst
– 450 modules arranged in layers of 150 modules each
 

Elimination / Reduction of Disposal Issues
Catalyst regeneration not only provides SCR operators a significantly lower cost
alternative to catalyst replacement, it also eliminates the costs and potential
environmental liabilities associated with disposing of deactivated catalyst, which must
be shipped to a disposal site and may be considered hazardous waste. The added cost
of placing spent catalyst in a landfill or disposal site can be significant.

Whether the catalyst can be deposited in a normal landfill or must be treated as
hazardous waste depends on the state and/or county where the landfill is located,
the type of catalyst, the type of coals the power plant has fired, and the poisons
present on the catalyst.

Experience shows that the cost of disposal can vary from $50 per ton to more than
$2,000 per ton. For just one layer of catalyst used in a 500 MW unit, these disposal
costs can amount to between $100,000 and $500,000, depending upon state
regulations. By extending the useful life of spent catalyst, regeneration eliminates the
need for catalyst disposal. If some catalyst is too damaged to be reused and must be
disposed of, SCR-Tech can ultrasonically clean the catalyst to remove all poisons prior
to disposal to avoid the potentially high costs of hazardous waste disposal.

Enhanced Activity
Experience has shown the life and deactivation rate to be similar when both new
and regenerated catalyst starts out with equal activity levels. However, because
new activity (beyond its original) can be achieved through regeneration, both its
life and NOx reduction potential can be greater.

Reduced SO2 Conversion
The use of regenerated catalyst has also been demonstrated to significantly lower
SO2 oxidation rates. SO2 oxidation rates in regenerated catalyst have been
measured as low as 0.1 percent, which is comparable to the conversion rates
achieved only through the use of more costly, ultra-low conversion catalyst.

Importantly, regenerated catalyst has been demonstrated to achieve significant
reductions in SO2 conversion while still maintaining original catalytic activity levels
and NOx reduction performance, whereas the use of ultra-low conversion catalyst
has been reported to be associated with a loss in catalytic activity.