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Sentry

Sentry On-Line VOC Monitoring

  • Continuous real-time monitoring of Volatile Organic Compounds (VOCs) and Siloxanes

  • Reduces variability of lab analyses and uncertainty caused by sample degradation

  • Optimizes preventive maintenance programs

  • Delivers fast return on investment

  • Protects engine manufacturer's warranty

  • Eliminates costly and time-consuming lab analyses

Applications:

  • Measurement of Siloxanes downstream of the Siloxane removal system

  • Control of Siloxane sorbent regeneration or replacement cycle

  • Product quality monitoring for high Btu gas plants prior to injection into the gas utility pipeline

  • Fuel quality monitoring prior to combustion

  • Ethylene monitoring in fruit depots and ripening rooms

  • General Purpose VOC Monitoring

The Siloxane Challenge

The production efficiency of the biogas-to-energy market has been challenged by the existence of a destructive group of silicon based organic compounds, known as Siloxanes, which have a significant impact on the service life of equipment.


 


Siloxane combustion products such as silicon dioxide or silica can blanket engine cylinder heads or gas turbine blades, and coat downstream catalysis with a glassy material that has a variety of adverse impacts. These effects include:
  • Reduced heat dissipation from the cylinder head
  • Accelerated degradation of engine oil
  • More frequent engine rebuilds
  • Destruction of expensive catalysts
  • Bent rods and/or catastrophic failure



The Need for On-Line Siloxane Monitoring

When effective Siloxane control technology such as absorbent media is applied before combustion, regenerations or change-outs are currently on a timed interval due to the uncertainty regarding the degree of media saturation. Siloxane sampling to test removal efficiency has historically been done via grab samples that are sent to a laboratory for time-consuming and costly analysis.

Further, grab samples introduce a level of uncertainty caused by degradation or sample decomposition. In contrst, a real-time on-site measurement tool provides rapid, cost-effective analysis without the variability of sample contamination and decomposition, delay and cost associated with lab samples while delivering proactive control of Siloxanes.

 

The Sentry

The Sentry gas chromatograph provides accurate and reliable Siloxane analysis in the landfill gas-to-energy production environment. The unit's features include robust design, on-site results and a low detection limit. The Sentry is easy to operate and requires minimal maintenance. Other trace compounds such as non-methane organic compounds (NMOCs) and hydrogen sulfide (HS2) can also be determined simultaneousy.

 

How it Works:



The individual compounds become separated from one another as they are carried through the gas chromatography column due to differences in their rates of interaction with the sorptive material in the column.

       Gas chromatography technology separates out Siloxane species.

 



 Download the Sentry Brochure

Sentry Assay List