energyMEDOR

Online Analysis and Monitoring of Sulfur Compounds in Natural Gas and Gaseous Fuels

The energyMEDOR is an automatic, isothermal gas chromatograph (autoGC-ED) specifically designed for the analysis of sulfur compounds such as H₂S, mercaptans, sulfides, total sulfur, and odor in natural gas and gaseous fuels.

The device provides online and continuous monitoring capabilities, available in two main versions:

  • energyMEDOR ppm: Measures sulfur compounds at ppm levels.
  • energyMEDOR ppb: Measures sulfur compounds at ppb levels.

Applications

  • Detection of impurities in natural gas, LPG, propane, and butane.
  • Odor removal control at ppb levels.
  • Catalyst protection in chemical processes.
  • Odorization control in natural gas or LPG at ppm levels.

Target Compounds

  • Standard compounds: THT, H₂S, DMS, and mercaptans (MM, EM, IPM, TBM, NPM, MES, 2BM).
  • Optional compounds: IBM and NBM.
Category:

Operating Principle

  • Automatic sampling using a valve and sample injection through a sample loop.
  • Isothermal gas chromatography using a metallic capillary column.
  • Detection of compounds via the MEDOR® electrochemical detector (Sulfur Specific Detector – SSD).
  • Detection signals are generated through electrochemical reactions between the wet cell electrolyte and sulfur compounds.

Key Features

  • High sensitivity and accuracy: Specific to sulfur compounds, unaffected by other substances.
  • Low maintenance: Detector lifespan up to 10 years; no need for calibration gas due to the built-in permeation system.
  • Stable performance: Automatic validation of results through standard sample injections; data storage for over 10 years.
  • Gas-saving: Extremely low gas consumption, with further reductions possible if needed.
  • Smart integration: Customizable high/low alarm thresholds suitable for odorization processes.

VISTACHROM® Software

  • Chromatotec’s proprietary software offers functionalities such as:
  • Remote control: Monitoring and controlling the sample injection process.
  • Data storage and traceability: Stores results and chromatograms with full traceability.
  • Threshold control: High/low alert management for QC purposes.
  • Data export: Supports data export via MODBUS, MGS1, 4-20 mA, or 0-10 V.

Optional Add-ons

  • Explosion-proof versions (Exp/Exd): Certified to Atex IECEx standards for Zone 1 & 2, Group IIC T4, or CSA C1D2 Groups B, C & D T4.
  • Internal calibration system: Using permeation tubes for standard gas generation.
  • Multi-stream sampling selector: Handles up to 16 streams with one analyzer.
  • Calculation modules: Averages, statistics, odor indices, etc.
  • Nitrogen generator: Suitable for safe or hazardous areas.

Certifications and Standards

  • International Standards: ASTM D7493-22, D5623, D7165-22.
  • ISO Standards: ISO 19739:2004, DIN 51855/7.
  • Certifications: GOST.
Measurement Performance Detection Limit H₂S: 0.1 ppm (0.1417 mg/m³), mercaptans: 0.1 ppm
H₂S: 5 ppb (7.0 µg/m³), mercaptans: 5 ppb
Measurement Range 0/10, 0/100, or 0/1000 (ppb or ppm)
Linearity R² > 0.995 for all compounds
Relative Standard Deviation (RSD) RSD < 3% at concentration levels within 48 hours
RSD < 0.5% with retention time within 48 hours
Measurement Cycle Time H₂S/MM/EM 300 seconds
H₂S, mercaptans¹, THT 720 seconds
H₂Sn, mercaptans¹, THT 900 seconds
H₂S, mercaptans², THT 1200 seconds
Gas System and Operational Requirements Carrier Gas Dry air or Nitrogen (N₂), pressure: 3 bar, consumption: < 4 ml/min
Use Nitrogen if THT is present
Internal Calibration 50 ml/min for ppm range
Pneumatic Valve 90 ml per switching operation
Sample Input Pressure: 1 bar

TSP energyMEDOR

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