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Process Analytical Oil & Gas, Upstream & Downstream LC & GC Chromatography Corrosion Chemical Inertness Sulfur Analysis Automotive And Aerospace Hydrophobicity & Moisture Resistance Non-stick, Anti-fouling Purity Semiconductor SilcoTek Bio-medical
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Poor Sampling Results? 3 ways to improve analyzer performance

Published on October 03 2014

stack_analyzer

Monitoring process conditions and emissions are critical to plant performance.  Unfortunately process sampling can be a complex and frustrating endeavor.  Often analysts are frustrated by seemingly unexplained and sudden changes to process conditions and sampling system accuracy.

  • Unable to calibrate or long calibration times
  • Loss of sample
  • Inaccurate results
  • Slow response

For example; a large oil refining company had trouble calibrating their sulfur standard.  Both high standard and low standard flowpaths were coated with SilcoNert® 2000.  The low side (10ppm) calibrated immediately; but the high side (200ppm) would not stabilize.  The technicians struggled for a week trying to bring the system into calibration.  Eventually the cause of the long calibration time was traced to a single fritted filter in a regulator that was not coated. This demonstrates the importance of a totally inert sample pathway. 

Industries Using Inert Coatings

SilcoTek® coatings can improve sample system performance 3 ways.

Minimize adsorption

SilcoTek® inert coatings prevent adsorption of sample and sample loss.

comparison_surface_61

Coat the entire sample pathway including:

  • Metal filters
  • Regulators
  • Tubing
  • Sample cylinders
  • Fittings

When sampling for low level sulfurs, priming and traditional sample techniques are ineffective.  Inert coatings are the best option for minimizing adsorption.  At low detection levels, even small uncoated surfaces, like a single fitting can impact sample calibration and accuracy.

 

Repel water

Prevent moisture contamination and adsorption by lining the sample pathway with hydrophobic coatings.

Hydrophobicity_Solutions_Graph_10_7_13-resized-600

Moisture can adsorb sample compounds and cause system corrosion and response issues.  SilcoTek coatings are hydrophobic, improving moisture control by 8x or more.  Systems using SilcoTek coatings experience:

  • Faster response
  • Improved flow
  • Less maintenance
  • Easier calibration

Reduce Corrosion

Prevent formation of adsorptive particles with corrosion resistant coatings.

Corrosion_Solutions_Dursan_Graph_10_16_13

SilcoTek coatings improve corrosion resistance by 8x or more.  By reducing corrosion, system maintenance is reduced, sample response is improved and sample reliability can be increased by orders of magnitude.

Coat the entire pathway:

  • Regulators
  • Filters
  • Tubing
  • Fittings & valves
  • Sample cylinders 

One final note, no matter how good the coating; poor system design will impact system performance.  Follow heat trace installation and maintenance instructions.  Maintain analyzers, probes, filters and all system components according to manufacturers instructions.  Inert coatings and robust system design will prevent most analyzer sampling issues.

Learn more about improving sample system performance.

Want more information? Read industry whitepapers

Posted by Marty Higgins

Topics: Process Analytical

Recommended Reading

Solving Process Sampling Problems

How To Prevent Chloride Corrosion In Process Sampling

SilcoNert® Assures Consistent Flare Gas Sulfur Sampling

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