Field-based Gas Analyzers and TransmittersEmerson Confidential 27-Jun-01, Slide 4 Emerson Process...

Field-based Gas Analyzers and TransmittersField-based Gas Analyzers and Transmitters

Ramasamy Manoharan, PhD

Orrville, OH 44667

[File Name or Event]Emerson Confidential27-Jun-01, Slide 2

OutlineOutline

Organization

What we do?

Capabilities in gas sensing

Sensor technologies for methane

What is next?


Emerson Process Management OverviewEmerson Process Management Overview

Emerson

Name changed from Fisher-Rosemount

World’s largest supplier of process management equipment and systems

Worldwide sales of $3.5 billion

17,000 employees at 200+ locations in over 60 countries


Emerson Process ManagementEmerson Process Management

Measurement &Analytical

Rosemount Dieterich PI Components

Senpro Rosemount

Analytical• Liquid- Uniloc • PAD- Gas• Daniels

Fisher-Rosemount Systems

• DeltaV• AMS

Westinghouse WPC Intellution PC&E Orion Kenonics CSI

Systems & Solutions

Fisher Controls

• Valves• Regulators

Micro Motion Brooks F-R Petroleum Daniel M&C Gulde Xomox El-O-Matic Con-Tek H. D. Baumann Francel Bettis

Actuation Daniel Valves

Valves and Flow


The world’s premier supplier of

instrumentation and systems for process analysis, emissions

monitoring, combustion analysis

and boiler control.

Rosemount Analytical Inc- PAD


Our World…Our World…

Combustion Control

Continuous Emission Monitoring

Process Control

Field hardened and Robust

Cost effective

Analyzer/transmitter

Stability, accuracy and precision

High MTTF, low MTTR and high uptime

Intrinsically safe, hazardous locations, explosion proof

Diagnostics and self validation

Easy calibration

Critical measurements


Critical MeasurementsCritical Measurements

Safety

Efficiency

Maintenance

Quality control

Automation

Compliance

Safety, cost savings and compliance


Analyzer Trends

Complex

Hardware Supplier

Proprietary

Initial Cost of Purchase

Sample Handling

Features/Functions

Fragile

Analyzers as Data Sources

Local Measurement

Plug & Play

Solution Provider

Open

Total Cost of Ownership

In-situ Probe

ROI-Value

Field Mounted

Analyzers as Web Servers

Plant-Wide Optimization

From: To:


Field Based Gas AnalyzersField Based Gas Analyzers

Moving analysis to the point of measurement


O2/Combustible Transmitter + Methane O2/Combustible Transmitter + Methane

O2 and CO measurement for efficient operation (stoichiometric point).

Split architecture/integrated electronics to sensor housing

O2 based on Zirconia fuel cell and CO by catalytic bead technologies

Methane sensor to detect leakage of raw gas into the boiler

Purge down and light off cycles of natural gas fired systems

Explosion proof package- Integrated sensor and electronics


Analytical Technologies for MethaneAnalytical Technologies for Methane

Calorimetric

Mixed potential

Semiconductor

TCD

FID

NDIR

Etalon

FTIR

GFC

Laser remote detection (fence line, airborne, Lidar)

CRDS

Gas

Signal

Transducer


Calorimetric SensorCalorimetric Sensor

Compact and inexpensive

Measures temperature rise as a result of combustible reaction between combustible gases (hydrocarbons, CO), and O2.

Not very selective

Good response

Quantitative

Amenable to field use

Limited diagnostics

Poisoning

Cross interference

Requirement of O2

MethaneProcessReference

. .. . . .

. . .. . .. .

.

.

..


0 . 0 1 0 0

0 . 0 1 5 0

0 . 0 2 0 0

0 . 0 2 5 0

0 . 0 3 0 0

1 2 : 3 3 : 1 1 P M1 2 : 4 6 : 3 1 P M1 2 : 5 9 : 5 1 P M1 : 1 3 : 1 1 P M1 : 2 6 : 3 1 P M1 : 3 9 : 5 1 P M1 : 5 3 : 1 1 P M2 : 0 6 : 3 1 P M2 : 1 9 : 5 1 P M2 : 3 3 : 1 1 P M

Sig

na

l (V

)

T i m e

0%

0.5%

Calorimetric Methane Sensor: RepeatabilityCalorimetric Methane Sensor: Repeatability


Calorimetric Methane Sensor: ResponseCalorimetric Methane Sensor: Response

0.0040

0.0080

0.0120

0.0160

0.0200

0.0240

0.0280

0.0320

0.0360

0 20 40 60 80 100 120

Sig

na

l (V

)

Time (minutes)

0%

1%

0.5%

0.25%

0.1%

0.05%

0.5%

0.25%

0.1%0.05%

0%


IR Absorption SensorsIR Absorption Sensors

Non Dispersive Infrared absorption (NDIR)

Etalon


IR Absorption Sensors (NDIR)IR Absorption Sensors (NDIR)

Input Output Detector

Methane

Compact (built in IR light source and detector)

Measures absorption of light by methane

Selectivity is possible (minimal interference)

Sensitive and quantitative

Continuous measurement

Diagnostics implemented


IR Source

Electronics

MeasurementDetector

PermeableGas Cell

ReferenceDetector

% LEL

NDIR Methane Sensor: DiagnosticsNDIR Methane Sensor: Diagnostics

IR Signal Analysis, Diagnostics & Status

Active Ref

Clean Air

Active Ref

Methane

Active RefWeak Source

Active RefFailedSensor

Active RefFailedSource

John Jarvis, Detector Electronics


IR Absorption of Methane (High Resolution) IR Absorption of Methane (High Resolution)


Specific Methane Sensing via Etalon TechnologySpecific Methane Sensing via Etalon Technology

Blank

Specific lightwhere methaneabsorbs

Light Source Sample Unchanged Light

Etalon Modulation

Detector

Light Source Methane Modified lightDue to MethaneAbsorption

Etalon Modulation

DetectorSpecific lightwhere methaneAbsorbs (reduced)


Etalon TechnologyEtalon Technology

High specificity to methane detection

High sensitivity

No or minimal interference

Quantitative

Rapid detection

No moving part

Internal and automatic calibration possible

Diagnostics implemented


Optical Methane Detection (OMD) via EtalonOptical Methane Detection (OMD) via Etalon

Heath Consultants


Technology in the Field Applications, e.g.Technology in the Field Applications, e.g.

Calorimetric, Electrochemical, Semiconductor

Price

NDIR

Flow, Mass Balance, Ultrasound

NIR

GC

FTIR

MS

Low

high high

Low

Complexity

L

TCD, FID, PID


Development ConsiderationsDevelopment Considerations

Price range

ROI

Threshold detector vs Analytical measurement

Quantitative

Accuracy (standard?), repeatability

Response/recovery time

Size

Specificity

MTTF

MTTR

Humidity

Temperature

Interference


Development ConsiderationsDevelopment Considerations

Threshold alarm -local (visual, audible), or remote

False positives/False negatives

Communication- wireless, GPS

Diagnostic alarm- local (visual, audible) or remote

Self validation

Sample delivery, conditioning

Calibration (simple, ease, economical, repeatable, traceable)

Power

Utilities

Protection (flame proof, intrinsic, purged, increased safety)

Classification and Certification

Field-based Gas Analyzers and TransmittersEmerson Confidential 27-Jun-01, Slide 4 Emerson Process...

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