FAQ
SAMPLING SYSTEMS FOR NATURAL GAS AND LIQUIDS ANALYSIS
Sampling probes
GENIE's range of sampling probes includes a dozen models.
Each model has different characteristics: with or without pressure regulation, process connection, operating pressure, insertion length, insertion method...
To quickly find the right probe for your application, consult the comparison chart below:
Download the comparison table for sampling probes:
_1.png){kind=small}
_1.png){kind=small}
Separators and Filters
The 2 GENIE 123 and GENIE 133 separators are the largest in the A+ Corporation liquid/gas separator range. Although they can handle identical flow rates and temperatures, their design and use are different.
The GENIE 133 separator has a larger internal cavity than the GENIE 123 separator, and can withstand higher pressures.
The GENIE 133 separator is ideal for continuous sampling of a gaseous source where large quantities of liquids are present, e.g. for the collection and processing of natural gas, for CEMS and certain refinery and petrochemical gases.
It can be mounted on a sampling probe (GENIE GPHV or 760) when the probe, fitted with a membrane at its end, is invaded by liquids. It can also be mounted before an analyzer or pump to protect them.
Finally, it is recommended for sample pre-conditioning in applications where there is no bypass and liquids must be discharged from the separator by gravity.
Miscellaneous information
The composition of the membranes is patented and cannot be disclosed. However, we can confirm that Genie® membranes do not alter the composition of the gas sampled.
Tests have been carried out by A+ Corporation to determine whether the membrane with which Genie® separators are equipped alters the composition of the gas sample;
After several series of tests, chromatographic analysis showed that the composition of the sample was virtually identical, whether it passed through a Genie® membrane or not. The gas sample is therefore unaltered as it passes through the Genie® membrane.
You can read the report: Genie Membrane Testing
Why use an electropolished or Sulfinert tube for analysis?
When using stainless steel trace tubes, we are often confronted with adsorption and desorption phenomena. These phenomena delay the detection of variations in trace quantities of certain components (notably moisture and the sulfur compounds H2S and SO2). The structure of stainless steels is such that certain compounds can be trapped in the "crevices" of the tube. When the tube reaches saturation, the levels remain stable as long as the chemical composition remains unchanged, and the temperature and pressure remain constant. Any change in composition, temperature or pressure modifies the rate of adsorption or release of compounds, creating false peaks when the analysis is read. These phenomena, sometimes referred to as the " memory effect ", are responsible for inconsistent measurements. This problem can be solved by using electropolished and/or Sulfinert-coated tubing.
Silconert 2000 is a patented, inert barrier that protects against chemical substances. It consists of amorphous silicone interdiffused on chemically polished 316L stainless steel tubing. The treated surface is then passivated with covalent bonds of hydrocarbon molecules. There are different trade names for the same treatment: Silconert®, Sulfinert® or Siltek®.
To find out more, download the sample transfer tube selection guide below: Selection guide