X-ray fluorescence rapid flow meter Chlorine meter — Petroleum sulfur and chlorine analyzer Compass 4294 plus spectrometer
background and introduction
When mixing new, fresh lubricants, controlling additive elements is essential to ensure correct lubrication properties as well as minimizing production waste and product obsolescence. EDXRF is a quick and easy analytical technique that can be used by non-technical people, but is powerful enough for experts to use in the development of new lubricant formulations.
In the production, use and recovery of lubricants, it is inevitable to have a clear and accurate understanding of the content of additive elements.
Chlorides are always present in crude oil, and their concentrations vary widely. Depending on the source, transportation method, and process conditions, chloride concentrations can peak in a very short period of time and cause devastating corrosion events throughout the refinery.
This application brief demonstrates the Energy Dispersive X-ray Compass 4294 for the analysis of chlorine in lubricants.
Instrument parameter
Factory-optimized test conditions are set for chlorine analysis. This industry Leading The technology enables low detection limits and high accuracy without the consumption of nitrogen, vacuum pumps, or extensive sample preparation.
X-ray fluorescence rapid flow meter Chlorine meter — Petroleum sulfur and chlorine analyzer Compass 4294 plus spectrometer
3. Test performance research
3.1 Sample preparation
ASTM D4929C is designed to measure residual organochlorides in crude oil. Crude samples are first prepared by distillation and washing to remove H2S and inorganic chlorides. Wash after distillationCI content of naphtha distillate obtained by XRF analysis using Part C method. thisNaphtha distillates are usually stable and contain less than 1000 mg /g. XRF calibration is performed using mineralsThe petroleum calibration standard, as a mineral oil, simulates the X-ray response of naphtha
3.2 Accuracy Research
To study the accuracy of Compass 4294, ten measurements were made of commercially available petroleum reference materials containing 100 ppm chlorine. > Test performance of 100 ppm chlorine
X-ray fluorescence rapid flow meter Chlorine meter — Petroleum sulfur and chlorine analyzer Compass 4294 plus spectrometer
Precision study
To investigate the accuracy of Compass 4294, two chlorine samples with certified values of 1000ppm and 300ppm were analyzed. The results shown below show that Compass 4294 makes accurate measurements of a wide variety of hydrocarbon samples. Another important parameter for XRF devices is the repeatability of the analysis. thisThe sample was measured 5 times over a period of time. The mean, standard deviation (Std Dev) and relative standard deviation (RSD) of chlorine content were calculated from the following data to derive the test performance of 1000ppm and 300ppm chlorine
X-ray fluorescence rapid flow meter Chlorine meter — Petroleum sulfur and chlorine analyzer Compass 4294 plus spectrometer
4. Test procedure and calibration demonstration
A range of commercially available petroleum standards have been used at the plant to calibrate the EDXRF spectrometer. Customers can run sample tests without any further calibration process in the field
Only four steps are required to perform the measurement. See pictures of how to prepare and place samples for analysis as shown below
1-1, prepare the sample cup. Cover the sample cup with a 6um Mylar film on the analysis side. The same Mylar film is also pre-set on the protective test window platform to avoid any accidental sample leakage into the analyzer.
1-2, usually pour 3-5 ml of oil from each standard into the analyzer’s cup up to the filling line.
1-3 Place the sample cup on the Compass XRF sample loader, which fits the sample cup size perfectly.
1-4, click the “Start” button to run the analysis. The result will be displayed after 200 sekundy.
Calibrate using a set of commercially available oil standards with known chlorine concentrations.
The figure below shows the correlation curve of chlorine in oils with low concentration ranges (ppm class).Approximate this data with a linear function. R2 is the coefficient of determination. The ideal correlation has an R2 value of 1.
conclusion
The Compass Compass4294 XRF provides an accurate, fast and easy to use alternative to crude oil that provides chlorine content results in minutes according to ASTM D4929 Part C. Compass 4294 XRF not only provides an effective chlorine monitoring tool, but also serves as an important process control tool for chlorine content in crude oil and other sample matrices during refining