Fourier Transform Infrared Spectroscopy (FTIR) Emissions is a technique using Fourier transform (a mathematical process) to convert raw data to obtain an infrared spectrum of absorption or emission of a solid, liquid, or gas. The FTIR simultaneously collects high-spectral-resolution over a wide spectral range, measuring the intensity over a narrow range of wavelengths at a time. Bellow are the specifications of the FTIR equipment within the GAIA laboratory.
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BEX-2000FT FTIR with O2 measurement |
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|---|---|
| Measuring method | FTIR |
| Application | Gasoline, Diesel, CNG and Alternative Fuels |
| Operating conditions | 5 – 40°C, RH 80% (non-condensing) |
| Sampling frequency | 1 Hz and 5 Hz (selectable) |
| Wave length | 400-7000 cm-1 |
| Wave length resolution | 0.5 cm-1 |
| Optical path length | 5.1 m |
| Gas cell volume | 200 ml |
| Gas cell pressure | Vacuum pressure |
| Gas cell temperature | 191°C |
| Gas cell window material | ZeSe |
| Optical mirror | Gold coat |
| Detector cooling method | MCT (liquid nitrogen, 50 ml/h) |
| Sample gas flow rate | App. 10 l/min |
| Sampling method | Vacuum |
| Inlet pressure | 0 – 5 kPa |
| Sample intake line | Heated sample line (191°C ± 5°C) |
| Temperature control sample gas | 191°C ± 5°C |
| Gas | Formula | Concentration | Units |
|---|---|---|---|
| Carbon Monoxide (low) | CO(low) | 0 … 5000 | ppm |
| Carbon Monoxide (high) | CO(high) | 0 … 10 | % |
| Carbon Dioxide | CO2 | 0 … 20 | % |
| Water | H2O | 0 … 30 | % |
| Nitrogen Oxide | NO | 0 … 2000 | ppm |
| Nitrogen Dioxide | NO2 | 0 … 500 | ppm |
| Nitrous Oxide | N2O | 0 … 200 | ppm |
| Total Oxides of Nitrogen | NO8 | 0 … 2500 | ppm |
| Ammonia | NH3 | 0 … 1000 | ppm |
| Methane | CH4 | 0 … 1000 | ppm |
| Acetylene | C2H2 | 0 … 1000 | ppm |
| Ethylene | C2H4 | 0 … 1000 | ppm |
| Ethane | C2H6 | 0 … 1000 | ppm |
| Propylene | C3H6 | 0 … 1000 | ppm |
| Propane | C3H8 | 0 … 1000 | ppm |
| Butadiene | C4H6 | 0 … 1000 | ppm |
| Butane | C4H10 | 0 … 1000 | ppm |
| Ethanol | C2H5OH | 0 … 1000 | ppm |
| Methanol | CH3OH | 0 … 1000 | ppm |
| Isocyanic Acid | HNCO | 0 … 1000 | ppm |
| Formaldehyde | HCHO | 0 … 1000 | ppm |
| Hydrogen Cyanide | HCN | 0 … 1000 | ppm |
| Sulfur Dioxide | SO2 | 0 … 500 | ppm |
| Carbonyl Sulfide | COS | 0 … 200 | ppm |
| Principle | Paramagnetic |
| Range | O2 O – 1 ~25 % |
| Repeatability | Within ±1.0 % F.S. for successive measurements of an identical sample under identical conditions |
| Zero drift | Within ±1.0 % F.S/8 hrs (at ambient temp. fluctuation of within ±5°C |
| Span drift | Within ±1.0 % F.S/8 hrs (at ambient temp. fluctuation of within ±5°C |
| Noise | Within 1.0 % F.S. |
| Linearity | Within ± % F.S. or ±2 % R.S. |
| Response (T90) | Within 3.0 sec |
| Sample flow | 1.5 liter/min. Span Gas: O2 |
| Operation gases | N2 Zero Gas; N2 |