Real-Time Hydrocarbon Composition, Wobbe Index and Calorific Value Measurement Using Tunable Filter Spectroscopy
The MOD-1022 is an industry-first, all-optical gas analyzer that combines gas chromatograph-like hydrocarbon speciation with real-time measurement speed. Using advanced Tunable Filter Spectroscopy (TF
S), the analyzer continuously measures gas composition, calorific value, Wobbe Index, molecular weight and other critical gas quality parameters without carrier gases, chromatographic columns or routine field recalibration.
Designed for natural gas, LNG, LPG, refinery fuel gas, hydrogen blending, gas turbine, petrochemical and renewable gas applications, the MOD-1022 provides process-quality measurements in seconds rather than minutes, enabling true real-time process control.
Proven Technology and Platform
- The MOD-1022 platform has been extensively deployed across the global energy, refining and petrochemical industries.Installed Base
- More than 2,700 analyzers deployed worldwide
- Over 350 cumulative years of field operation
- Installations across:
- Upstream oil and gas
- Midstream pipeline operations
- LNG facilities
- Refineries
- Petrochemical plants
- Power generation facilities
- Hydrogen and renewable gas projects
- Hazardous area certified for industrial environments
This extensive deployment history provides users with confidence in both the reliability and long-term performance of the technology.
Versatile Spectroscopic Hardware Platform
The MOD-1022 utilizes a highly flexible spectroscopy platform capable of supporting a broad range of gas analysis applications.
- Platform Capabilities
- Near Infrared (NIR) and Mid-Infrared (Mid-IR) analysis
- Natural gas composition monitoring
- LNG process monitoring
- LPG quality analysis
- Refinery fuel gas optimization
- Ethylene and olefins production
- Hydrogen blending applications
- Renewable Natural Gas (RNG)
- Synthetic Natural Gas (SNG)
- Gas turbine fuel quality control
- Fuel cell applications
The analyzer can be supplied as:
- Process-mounted installation
- Analyzer shelter installation
- Portable field analyzer
- 24 VDC powered remote installation
Alternative to Traditional Analyzer Technologies
The MOD-1022 provides a compelling alternative to:
-
- Gas Chromatographs (GC)
- Residual Oxygen Calorimeters
- Refraction-Based Gas Analyzers
- Inferential Fuel Gas Measurement Systems
By combining fast response, low maintenance, real-time gas quality calculations and GC-equivalent hydrocarbon analysis, the MOD-1022 enables operators to move from delayed reporting toward true real-time process control.
- What This Means for Plant OperatorsThe result is a gas analyzer platform that enables:
- Faster process optimization
- Improved combustion efficiency
- Reduced fuel consumption
- Lower NOx and CO emissions
- Improved gas blending control
- Better turbine protection
- Reduced maintenance requirements
- Lower total cost of ownership
- Greater operational reliability
Whether monitoring natural gas pipelines, LNG terminals, refinery fuel gas systems, hydrogen blending facilities, gas turbines or petrochemical processes, the MOD-1022 delivers the real-time gas quality information needed to maximize performance and profitability.
- Principle of OperationHow Tunable Filter Spectroscopy Works
The MOD-1022 utilizes Tunable Filter Spectroscopy (TFS), operating in both the Near Infrared (NIR) and Mid-Infrared (Mid-IR) spectral regions.
Unlike conventional gas chromatographs that physically separate gas components before analysis, the MOD-1022 measures the complete spectral fingerprint of the gas mixture directly.
The process begins when a conditioned gas sample flows continuously through a heated optical measurement cell. A broadband infrared light source passes through the gas stream, exposing the gas molecules to a wide range of infrared wavelengths.
Each gas molecule absorbs infrared energy at specific wavelengths determined by its molecular structure. Methane, ethane, propane, butanes, carbon dioxide, ethylene, propylene and other hydrocarbons all possess unique absorption signatures that can be identified within the infrared spectrum.
At the heart of the analyzer is a rotating Fabry-Perot optical filter. As the filter rotates, it continuously scans a broad range of infrared wavelengths rather than measuring a single wavelength or narrow band.
This wavelength scanning process generates a detailed spectral fingerprint of the gas sample.
Advanced chemometric algorithms compare the measured spectral fingerprint against factory-calibrated reference spectra and simultaneously determine the concentration of multiple gas components in real time.
- Step-by-Step Measurement Process
Step 1: Sample ConditioningThe sample conditioning system delivers a clean, dry, single-phase gas stream to the analyzer. Proper sample conditioning eliminates droplets, aerosols and contaminants that could interfere with optical measurements.
Step 2: Infrared Illumination
A broadband infrared light source illuminates the flowing gas sample inside the heated optical cell.
Step 3: Molecular Absorption
Each gas component absorbs specific infrared wavelengths according to its molecular structure. The resulting absorption pattern contains information about both the identity and concentration of each component.
Step 4: Tunable Filter Scanning
A rotating Fabry-Perot optical filter scans multiple wavelengths across the infrared spectrum, creating a complete spectral fingerprint of the gas mixture.
Step 5: Spectral Acquisition
The analyzer continuously collects and digitizes the spectral information generated by the interaction between the gas molecules and the infrared light.
Step 6: Chemometric Analysis
Advanced multivariate chemometric algorithms process the spectral data and determine the concentration of each gas component simultaneously.
Step 7: Gas Quality Calculation
Once gas composition has been determined, the MOD-1022 automatically calculates:
- Higher Heating Value (HHV)
- Lower Heating Value (LHV)
- Calorific Value (CV)
- Wobbe Index (WI)
- Molecular Weight
- Specific Gravity
- Relative Density
- Combustion-related fuel quality parameters
The results are updated continuously and transmitted directly to plant control systems via Modbus and other industrial communication protocols.
MOD-1022 Industries and Applications
# Industry Typical Applications 1 Natural Gas Industry Gas quality measurement, custody transfer verification, pipeline monitoring, gas blending, storage facilities, compressor stations, city gate stations, metering stations, gas processing plants 2 LNG Industry LNG production, LNG export terminals, LNG storage, regasification facilities, LNG-fired turbines, LNG engines, LNG process monitoring, fuel gas management 3 LPG Industry LPG production, fractionation units, storage and distribution terminals, quality control, LPG blending, LPG-powered engines and turbines 4 Refining Industry Refinery fuel gas monitoring, BTU analysis, fuel gas blending, furnace fuel gas optimization, heater and boiler control, hydrocarbon stream analysis 5 Gas Turbine Applications Power generation, turbine protection, fuel quality monitoring, combustion optimization, emissions reduction, closed-loop fuel-air ratio control 6 Internal Combustion Engines Natural gas engines, LNG engines, LPG engines, biogas engines, CHP facilities, distributed generation, dual-fuel engines 7 Ethylene Industry Steam cracker monitoring, feedstock analysis, de-methanizer monitoring, de-ethanizer monitoring, de-butanizer monitoring, ethylene and propylene production 8 Olefins Industry Olefin complexes, C4 processing, butadiene extraction, butene separation, polymer feedstock quality monitoring, olefin fractionation 9 Hydrogen & Renewable Gas Hydrogen blending, Power-to-Gas systems, Renewable Natural Gas (RNG), Synthetic Natural Gas (SNG), green methane projects 10 Biogas & Renewable Fuels Landfill gas, digester gas, biomethane upgrading, renewable natural gas injection, waste-to-energy facilities 11 Fuel Cell Applications Natural gas fuel cells, LNG fuel cells, LPG fuel cells, fuel quality compensation, fuel utilization optimization 12 Pipeline & Midstream Operations Product change detection, interface detection, gas blending verification, compressor stations, commercial metering, revenue assurance Why MOD-1022 Is Used Across So Many Industries
Although the applications vary, customers generally share the same objectives:
Customer Goal How MOD-1022 Helps Improve process control Real-time gas composition updates every 1–120 seconds Reduce operating costs No carrier gas, low maintenance, permanent calibration Improve combustion efficiency Continuous BTU, HHV and Wobbe Index measurement Reduce emissions Better fuel-air ratio control and combustion optimization Protect critical equipment Rapid detection of fuel quality changes Improve product quality Continuous hydrocarbon composition monitoring Support hydrogen and renewable fuels Real-time monitoring of changing gas quality Replace or complement gas chromatography GC-like hydrocarbon speciation with significantly faster response Enable unattended operation Remote monitoring with Modbus and DCS integration Lower total cost of ownership Fewer consumables, reduced maintenance and simpler infrastructure Industries Served by the MOD-1022 Platform
- Natural Gas
- LNG
- LPG
- Refining
- Petrochemicals
- Ethylene
- Olefins
- Power Generation
- Gas Turbines
- Gas Engines
- Hydrogen Blending
- Renewable Natural Gas (RNG)
- Synthetic Natural Gas (SNG)
- Biogas
- Fuel Cells
- Pipeline & Midstream Operations
The MOD-1022 platform provides a single spectroscopy-based analyzer technology that delivers real-time hydrocarbon composition, BTU, calorific value, Wobbe Index and fuel quality measurements across the entire natural gas, LNG, LPG, refining, petrochemical and renewable energy value chain.
MOD1022 Specifications
Conclusion
The energy, refining, petrochemical and renewable gas industries are undergoing a fundamental transformation. Fuel compositions are becoming increasingly dynamic due to LNG imports, hydrogen blending, renewable natural gas, biogas integration and changing feedstock sources. In this environment, traditional analytical technologies that deliver results minutes after a process change are no longer sufficient for effective process control.
Modern facilities require gas quality information in real time.
The MOD-1022 Real-Time Gas Quality Analyzer addresses this challenge by combining the compositional insight traditionally associated with gas chromatography with the speed and responsiveness required for modern industrial operations. Through advanced Tunable Filter Spectroscopy (TFS), the MOD-1022 continuously measures hydrocarbon composition and calculates critical gas quality parameters including Heating Value, Calorific Value, Wobbe Index, Molecular Weight and Specific Gravity with update rates as fast as one second.
Unlike conventional gas chromatographs, the MOD-1022 operates without carrier gas, chromatographic columns or routine field recalibration, significantly reducing maintenance requirements, operating costs and infrastructure complexity while improving analyzer availability and reliability.
With more than 2,700 installations worldwide and over 350 cumulative years of operating experience, the MOD-1022 has proven its value across natural gas transmission, LNG facilities, LPG production, refinery fuel gas systems, gas turbine power generation, hydrogen blending projects, petrochemical plants, ethylene and olefins production, renewable gas facilities and pipeline operations.
The result is more than an analyzer.
The MOD-1022 is a real-time process optimization platform that enables operators to:
- Improve combustion efficiency
- Reduce fuel consumption
- Lower NOx and CO emissions
- Optimize gas blending operations
- Protect turbines and critical equipment
- Increase product quality and process stability
- Support hydrogen and renewable fuel integration
- Reduce total cost of ownership
- Improve profitability and sustainability simultaneously
As the industry continues to move toward decarbonization, digitalization and advanced process control, the value of measurement is no longer defined solely by analytical accuracy. The true value lies in the ability to transform data into immediate operational action.
The MOD-1022 delivers that capability.
Ready to Transform Gas Quality Data into Real-Time Operational Performance?
From natural gas pipelines and LNG terminals to refinery fuel gas systems, gas turbines, hydrogen blending networks and petrochemical complexes, the MOD-1022 provides the real-time gas quality intelligence required to optimize performance, maximize efficiency and enable the next generation of energy and process operations.
Whether your objective is to improve combustion efficiency, reduce emissions, optimize fuel blending, protect critical equipment, increase product quality or support hydrogen and renewable fuel integration, the MOD-1022 delivers the speed, reliability and analytical performance needed to achieve measurable results.
With more than 2,700 installations worldwide, 350+ cumulative years of field operation, and proven performance across the energy, refining, petrochemical and power generation sectors, the MOD-1022 has become a trusted platform for organizations seeking to move beyond traditional gas analysis and embrace real-time process optimization.
The future of gas quality measurement is not just knowing what happened—it is knowing what is happening now and having the ability to act immediately.
Contact MODCON Systems Today
Speak with our gas analysis specialists to discuss your application and discover how the MOD-1022 can help your facility:
- Improve process efficiency
- Reduce fuel consumption
- Lower operating costs
- Reduce CO and NOx emissions
- Enhance equipment protection
- Optimize gas blending and fuel quality
- Support hydrogen and renewable gas initiatives
Request a consultation, application review, or product demonstration today and see how real-time gas quality measurement can unlock new levels of operational performance, profitability and sustainability.
