FID Gas Chromatograph & methaniser (UMTR)
Analysis of CH4, CO, CO2 & NMHC in PPB, PPM or % in Helium, Argon, Oxygen, Nitrogen, Hydrogen or Air.
General
The FID Gas Chromatograph (flame ionization detector) is placed in a temperature regulated chamber. It is designed to detect traces of hydrocarbons in neutral gases. The combustion of Hydrogen and Synthetic Air creates a flame in which are burning the organic components contained in the gas to be analysed. When burning, these components produce ions which are collected by an electrode.
Principle
The very weak current obtained in this way is amplified in an electrometer with high gain and directed to a data acquisition system. A polarization electrode is connected on the level of the nozzle and a collecting electrode with adjustable distance make the best results possible. Coupled with a methanizer (UMTR unit), it also detects traces of CO and CO2. The methaniser is foreseen to convert, in a catalytic reactor, traces of CO and CO2 into methane.
This reaction takes place at a temperature of ± 350°C in presence of Hydrogen in excess. With a properly adjusted temperature and flowrate, the efficiency is almost of 100%. When supplied with high purity gases, the detection threshold can reach 1 ppb.
Some Global References
| Company | Type of analyser | Analyser | Measurement |
|---|---|---|---|
| Air Liquide (Brasil) | Oxygen | FID | Separated CnHm |
| Air Liquide (Canada) | Oxygen & Air | FID | CH4, NMHC |
| Air Liquide (Belgium) | Nitrogen | FID | CH4, CO, CO2, NMHC |
| Linde (Germany) | Oxygen | FID | BTX |
| ArianeSpace (French Guiana) | Multi gas | FID | CO2, C2H2 |
| Yora (Germany) | Oxygen, Krypton, Xenon | FID | CH4, C2H2, C3H3 |
Technical Specifications
| Accuracy | Range and application dependent |
| Drift | <1 % over 24 hours |
| Temperature drift | <1 % per degree |
| Operating temperature | Around 20°C without wide variations of temperature |
| Sampling gas | N2, Ar, He, Air, H2, O2 |
| Sample gas connection | 1/8’’ Swagelok OR 1/8’’ VCR |
| Sample flow rate | Approximately 3 to 5 l/h |
| Sample pressure | < 100 mBar |
| Combustive gas | Synthetic air |
| Combustive gas connection | 1/8’’ Swagelok OR 1/8’’ VCR |
| Combustive gas pressure | 2 Bar stable |
| Combustive gas fl ow rate | 300 ml/min |
| Recommended quality | 5.0 |
| Fuel gas | Hydrogen |
| Fuel gas connection | 1/8’’ Swagelok OR 1/8’’ VCR |
| Fuel gas pressure | 1 Bar stable |
| Fuel gas fl ow rate | 38 ml/min |
| Recommended quality | 6.0 |
| Carrier gas | Argon, Nitrogen, Helium or Hydrogen |
| Carrier gas connection | 1/8’’ Swagelok OR 1/8’’ VCR |
| Carrier gas pressure | 7 Bar |
| Carrier gas fl ow rate | 2 to 6 l/h |
| Carrier gas fl ow rate | 2 to 6 l/h |
| Recommended quality | 6.0 |
| Power supply | 220 Vac, 50-60 Hz |
| Power consumption | 500 VA |
| 4-20 mA output | Eight configurable outputs depending on the application. |
| RJ-45 connection | Computerised system maintenance |
| Output relays (SPST 2 amperes / 250 Vac) | 1 Analyser Failure alarm contact 1 Alarm High contact 1 Alarm High High contact |
Dimensions & chromatogram
(Dimensions can differ regarding the application)
Measurement Capabilities
| Argon | Helium | Hydrogen | Nitrogen | Oxygen | |
|---|---|---|---|---|---|
| CH4 | < 10 ppb | < 10 ppb | < 10 ppb | < 10 ppb | < 10 ppb |
| CO | < 10 ppb | < 10 ppb | < 10 ppb | < 10 ppb | < 10 ppb |
| CO2 | < 10 ppb | < 10 ppb | < 10 ppb | < 10 ppb | < 10 ppb |
| NMHC | <10 ppb | < 10 ppb | < 10 ppb | < 10 ppb | < 10 ppb |
Features
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Brochures
FID 510
FID 520