Chemical Sensors for the New Sampling/Sensor Initiative

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Chemical Sensors for the NewSampling/Sensor
Initiative

• Nelson Lytle
• Honeywell International, Inc.
• January 11, 2005

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Objectives

• Illustrate sensor/composition/property
  measurement concept with examples
• Discuss potential NeSSI sensor cluster
  applications
• Invite sensor developers to participate
• Increase the applicability of NeSSI as a sensor
  platform
• Get tools into chemists and engineers hands

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The Ten NeedsChemical/Composition/Property

• Bio Assay
• Chemical Composition
• Cleaning Validation
• Coating Consistency
• Mixing Efficiency

• Moisture Concentration
• Particle Sizing
• Vapor Characterization
• Viscosity/Rheology
• Waste Minimization

Mel Koch, CPAC
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Major Goals of NeSSI

• Modular, miniature, smart sample system
• Based on ISA SP76 standard
• Field mounted
• Open connectivity for communications
• Integration of sample system with
  physical/chemical sensors
• Technology bridge to process for micro-analytical
  devices

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NeSSI Enabler for Micro Analytical(the rail
concept)
Standard connectivity
Standard Electrical (Digital) Interface Rail
SAM
Standard hockey- puck PC
Anyones Actuator
Anyones Sensor
Standard Mechanical Interface Rail
Sensor/Actuator Manager
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Desirable Properties Sensor Wish List

• Global electrical (hazardous) certifications
• Plug Play (self-identifies)
• Robust (gt 99.9 uptime)
• Self checking/calibrating/correcting
• Low cost (lt5K)
• Suitable for operating as a Functional Clusters
• Gas and/or Liquid Service
• Fast (continuous) Response (lt 10 seconds)
• Physically small in size
• Low Power (for intrinsic safe operation)
• Low/No Utility or Reagent Usage

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Simple Sensors - The Dirty Dozen

• Density
• Refractive Index
• Viscosity
• Optical Absorbance
• Dielectric
• Conductivity

• pH/ISE/ORP
• Turbidity
• Thermal Conductivity
• Ultrasonic
• Moisture
• Gas Specific

Characteristics simple, dedicated, robust,
commonly used.
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Deacon Reaction
2HCl 1/2 O2 Cl2 H2O
Step 1 HCl(g) reacts with metal oxide (MO)
catalyst to produce MCl and H2O(g) Step 2 O2(g)
reacts with MCl to produce MO and Cl2(g)
Thermal Conductivity He 222.3 N2 38.3 O2
41.0 Cl2 18.0 HCl 24.0 H2O 35.7
UV Absorbance Cl2 _at_ 350 nm
This process can be controlled using thermal
conductivity and a UV-Vis absorbance sensor.
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Polymerization Control
Monitor molecular weight via density, RI, and
viscosity.
Use density or RI for low Mw and viscosity for
high Mw.
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Unsaturation in Edible Oils
NIR absorbance can be used to monitor
unsaturation in edible oils. But so can density
and RI.
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Edible Oil Classification
Simple sensors can monitor blending and determine
quality of edible oils.
Use density, RI, viscosity, optical absorbance to
classify oils.
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NeSSI Sensor Clusters
Water Monitoring

• Boiler Water
• Conductivity
• pH
• pNa

• Waste water
• pH
• TOC
• O2

Sensors include pH, ISE, ORP, conductivity, UV
absorbance.
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NeSSI Sensor Clusters
Continuous Emission Monitors

• NOx
• SOx
• O2
• CO

Use NeSSI advantages of P,T,F control and
filtration.
Potential sensors include specific gas sensors,
UV-Vis, and IR.
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Jet Fuel Properties
NeSSI Sensor Clusters

• Density
• Flash point
• Freezing point
• Fuel system icing inhibitor
• Aromatics

Sensors include density, RI, turbidity, NIR/IR
absorbance.
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What am I proposing?

• Simple sensors provide a way to perform analyses
  that are useful for process control and
  optimization
• These are measurements that are being used today
• Simply adapt them to the NeSSI standard

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Conclusion

• I hope that I have made you aware of the
  opportunity to use simple, robust sensors to make
  chemical and property measurements.
• I hope to motivate sensor developers to make
  sensors available that meet the NeSSI standard.

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• Everything is in place to make it happen.

Come on in the waters fine.
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FIN