ELTRA ELEMENTRAC CS-r resistance-heated furnace carbon-sulfur analyzer
ELTRA
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Field of application: rapid, simultaneous determination of coal and sulfur from coal, coke, oil, ash, catalyst, limestone, gypsum, soil, rubber, plant leaves, tobacco, waste, sand, glass and similar samples.
Construction: the system consists of two main units, an analyzer built into a housing with the tube furnace, and the computer.
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Principle of operation:
The sample to be analyzed is measured into an combustion boat. The boat can be made of porcelain, ceramic or quartz. The boat containing the sample is transferred to the tube furnace. In the furnace, which can be heated up to 1,550 °C, the sample burns in the oxygen stream (the fuel that feeds the combustion and also the carrier gas), and then the combustion products enter the analyzer through various filter/cleaning materials.
The gases pass through all the measuring channels, where infrared sensors specifically sensitive to each substance detect the components of the sample (CO2 and SO2) and then transmit this signal to the processing unit.
The weight of the sample that can be measured depends on the measuring range of the channel in the device and the carbon or sulfur content of the sample. In the case of a properly selected measurement range, the typical sample weight can be between 0.1 and 0.5 g. If the device has a channel capable of measuring both low and high concentrations of the element to be measured, the analysis will definitely be successful, because one of the channels will give an obviously evaluable result.
In the event that the device e.g. it only has a measuring channel for low carbon, only very little of a 40% carbon sample, e.g. 0.05 grams may be measured to prevent the channel from overflowing. It can be seen that the larger measured mass provides a more reliable result, so in the above case it is reasonable to also order the high carbon channel for the device.
ELTRA analyzers can only be operated together with the external computer!
The analyzer is complete and functional with the pipe furnace built into the same housing, the connected computer, and the ELEMENT software running under Windows. By connecting an analytical scale, which is part of the package, to the computer, the measurement can be entered automatically by pressing a button. If a scale is not connected to the system, the measured weight must be entered manually on the computer keyboard. After starting the analysis, the next sample can be measured immediately, and the mass data can also be entered into the computer. For many samples, this option significantly speeds up the work.
Due to the measurement supported by the computer software, it offers the use of many other options, such as: storing results, creating statistics, storing and monitoring signal shapes, automatically enlarging and reducing the diagram, printing results, etc. A typical measurement is approx. lasts 60 seconds, but depending on the condition of the cleaning / filtering materials (degree of exhaustion) and the content of the sample, it can take up to 60-120 seconds, but for example, when measuring sulfur from fly ash, the measurement can take up to 5-8 minutes.
The system can also be equipped with a TIC (Total Inorganic Carbon) module, which simply needs to be placed next to the analyzer. For TIC determination, the sample is treated with acid in a flask placed on a heated magnetic stirrer.
The heated acid destroys the carbonates in the sample, which produce CO2. The generated gas is flushed out of the flask by the oxygen used as a carrier gas, which then passes through the infrared measuring cells of the analyzer.
The system equipped with the TIC module can be used for TIC or TC (Total Carbon) analysis as required - without any modifications. In the case of TC, the sample is burned in the resistance-heated furnace known as the "basic device".
| Possible channels of the CS-r analyzer: | |
|---|---|
| Measuring range carbon: | 0.014 – 350 mg (carbon) |
| Accuracy carbon: | 0.007 mg, or 0.5 % (whichever is higher) |
| Measuring range sulfur: | 0.0035 – 110 mg |
| Accuracy sulfur: | 0.0018 mg, vagy 0.5 % (whichever is higher) |
Eltra CS-r carbon-sulfur element analyzer technical data:
| Specifications: | CS-r | |
|---|---|---|
|
CS-r computer-controlled analyzer manufactured for 1-4 channels, with resistance-heated oven, electronically controlled gas system. Consumables (combustion boat, chemical, calibration standard, etc.) must be ordered separately! Can be connected to an analytical balance or printer (options). |
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| Furnace temperature: | adjustable up to 1,550 °C | |
| Carrier gas: | 99.5% pure oxygen, 2 – 4 bar, 3 liters/minute | |
| Measuring time: | 60 – 180 sec. (normally) | |
| Filter materials: | CO2 trap; high purity sodium hydroxide (Ascarite) | |
| Water trap: | magnesium perchlorate (Anhydrone) | |
| Used gas: | Oxygen 99.5 % (2 – 4 bar) | |
| Voltage: | 230 V / 50 Hz | |
| Max. power consumption: | 20 A (at one phase) | |
| Dimensions: | 58 x 52 x 61 cm (+10 cm the sample balcony) | |
| Weight: | approx. 77 kg, (+ the optional TIC module 28 kg) | |
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