Formaldehyde reduction with catalysts

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Formaldehyde reduction with catalysts

• PSO project 5230
• Supported by Eltra and the Danish Gas companies

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Agenda

• Emissions from lean burn engines
• This project
• Preliminary results
• Conclusion

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Emissions
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Formaldehyde
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Other aldehydes
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Danish EPA proposed regulation

• From July 2003
• Emission limit of 10 mg/m3 _at_ 5 O2 for large
  (gt5MW fired) engines
• Correction to an efficiency of 30
• There has been a general exemption from the
  regulation until mid 2006

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Purpose I

• Examine different catalyst ability for
  formaldehyde reduction
• Collect and evaluate accessible knowledge on
  formaldehyde reduction with other methods
• Conclude on Best Available Technology (BAT) for
  formaldehyde reduction on gas engine plants

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Purpose II

• Examine the available catalyst for positive
  (reduction) effects on
• Odor
• Other aldehydes
• CO
• Methane and C2 hydrocarbons
• Emission of lubrication oil

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Project partners

• Rolls-Royce (Ulstein Bergen) Tørring plant
• Jenbacher Jetsmark (and Frederiks) plant
• Pon Power (Caterpillar) Hjortebjerg plant
• Wärtsilä
• DGC

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Follow group

• Danish EPA
• Suppliers and plant organizations (DFF and
  FDKV)
• Eltra (Energinet.dk)Transmission and system
  responsible for western DK electricity net
• Gas companies Transmission and distribution
  companies

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Accomplishment (in danish)
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Results from Tørring KV
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Results from Jetsmark KV
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Results from Hjortebjerg KV
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Results

• 30-50 odour reduction have been observed
• Results indicate oil aerosol reduction, but
  results are not conclusive

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Conclusions

• All three planned catalyst are installed and
  approaching 2500 to 5000 hours of operation
• Formaldehyde reductions of 50 for one type of
  catalyst, 90 reduction for other type
• Formaldehyde reduction seems to be stable or
  decrease slightly over time of operation