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MEASUREMENT & TESTING Analysis and quantification of H2 S during deodorisation process in steam reforming units


Steam reforming is a process used to produce high amounts of hydrogen from methane. In this case, a superior quality of methane is needed to be purified from all odorant compounds present in natural gas. To ensure the accuracy of the deodorisation process, it is necessary to monitor the quantity of sulphur compounds emitted while being separated from the natural gas, however, until now, analysing this compound in such a humid and complex matrix has been problematic.


Chromatotec solutions quantify hydrogen sulphide at high concentration (low ppm) samples taken directly from natural gas pipes and very low concentrations (low ppb) sample taken after deodorisation. This dual-range system works with two different volumes of sampling loops. The analyser automatically switches between the two sampling loops to avoid the saturation of the system and/or signal.


The energyMEDOR is capable of analysing H2 S, mercaptans, DMS and/or total reduced sulphurs by directly collecting the sample at the vent. All the molecules


are then separated by chromatography and detected at a very low level (ppb and/or ppm). In this specific case, the energyMEDOR is equipped with two sampling loops adapted to two different ranges of concentrations (0-1 mg/Nm3


to 0-50 mg/Nm3 ) and integrated in an ATEX-certified cabinet.


Thanks to its internal calibration system, the results are validated automatically and there is no need for manual intervention. The LCD colour touchscreen allows the user to view and edit the results directly in front of the analyser without opening it. The data are also automatically exported to a control room where the user is able to switch manually between the two sampling options instead of automatic mode.


The energyMEDOR detects sulphur compounds thanks to a long-life (up to 10 years) sulphur-specific Electrochemical Detector (ED). The solution analyses individual compounds and total sulphurs by the sum of all the compounds.


More information online: ilmt.co/PL/Wr3J For More Info, email:


Dependable gas flow measurement for industrial pollution control and monitoring


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The engineering team at a coal-fired electric power plant utilising ammonia (NH3


) for nitrous oxide (NOx under harsh operating conditions. ) removal by its pollution control


system installed the ST100 Series thermal flow meter from Fluid Components International (FCI) based on its superior repeatability in measuring NH3


The ST100 Series flow meter allowed the plant team to optimise its selective catalytic reduction (SCR) system. This step improved performance while substantially reducing NH3


such applications.


The engineers at the electric power plant were experiencing problems with inconsistent measurement of the vaporised NH3


injected into their flue gas as a means to reduce NOx emissions. The original


system utilised a volumetric flow sensor, which wasn’t well suited for controlling the NH3


gas injection system. Switching to the mass


flow sensing ST100 Series Meter, as opposed to taking a volumetric measurement, solved the false readings issue.


Given the ST100 flow meter’s standard wide flow turndown ratio of 100:1 (up to 1000:1 based on application), and the ability to measure mass flow, instead of volumetric flow, the engineers decided to conduct a pilot test. They installed the insertion style ST100A thermal flow meters on the primary vaporised ammonia feed lines to their nozzle grid for the test.


With the resulting improved measurement reliability, they took the project one-step further and installed in- line style ST100AL thermal flow meters at each of their nozzle locations. After proving out the benefits in one operating unit, they eventually instrumented the ammonia injection systems for all of the units within the facility.


The ST100 meter can be factory calibrated to measure virtually any popular process gas as well as mixed gases. The technology is suitable for use in wet and dirty gas applications, having no small ports prone to fouling. The basic insertion style air/gas meter features a thermal flow sensing element that measures flow from 0.25 up to 1000 SFPS (0.07 NMPS to 305 NMPS) with accuracy of ±0.75 percent of reading, ±0.5 percent of full scale. The basic in-line style meter is available for 2-inch and smaller line sizes.


The ST100 Series meter’s transmitter is unsurpassed in meeting both a plant’s current and future need for outputs, process information and communications. Whether the output required is traditional 4-20 mA analogue, frequency/pulse or advanced digital bus communications such as HART, Modbus, PROFIBUS, or FOUNDATION Fieldbus, the ST100 Series will meet your instrumentation integration needs. Its advanced bus communications are all third party certified and registered.


Developed with a graphical, multivariable backlit LCD display, the ST100 Series Meter brings new meaning to the term “process information”. Its sophisticated readout continuously displays all process measurements and instrument status for easy on-site viewing by technicians, and it has the ability to query for service diagnostics via an integral, optical HMI that does not require declassification of hazardous areas.


Designed for extreme industrial process and plant conditions, the ST100 Meter can be used in service up to 850ºF (454ºC) and is available with both integral and remote (up to 1000 feet [300 meters]) electronics versions. The ST100 meter is agency approved for hazardous environments, including the entire instrument, the transmitter and the rugged, NEMA 4X/IP67 rated enclosure.


Global approvals include: ATEX, CPA, CRN, EAC/TRU CU, FM, FMc, FDT, GOST, IECEx, Inmetro and NEPSI. Third party failure rate data per IEC 61508 is available that demonstrates suitability of the hardware architecture for SIL 1 (HFT=0) applications.


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The meter, with its rugged thermal dispersion sensor head, provides a highly repeatable measurement solution to control vaporised NH3


in


Zeltex, LLC announces the latest in their line of ZX-101 Portable Fuel Analysers, the ZX-101SQ. The ZX-101SQ combines the proven reliability and lab accuracy of the previous model, the ZX-101XL, that thousands of customers currently rely on. The SQ is upgraded with improved Near Infra-red optics (NIR) as well as a much easier user interface. Quickly analyses for octane, cetane, percent ethanol, and biodiesel percentages. This new analyser will enable you to get fast sample analysis to determine your


fuel quality at the pump, in the field, or in the lab.


The ZX-101SQ has an increased wavelength range for more accuracy with biodiesel and ethanol analysis with improved (14 to 16) calibrations and accuracy (particularly for Biodiesel). This instrument’s optical range has been increased to (810nm – 1045nm) from (893nm – 1045nm) with the previous models in the range. This analyser also includes an automatic fuel type detection option which reduces operator error, a 2-piece filter tray (not one piece) adds longer filter life span (approx. 25 y) and the larger colour display with graphic instructions and the enhanced user interface and printer controls further improve the ZX-101SQ’s ease of use. Zeltex have also expanded the memory of stored, analysed samples from 25 to 100 samples having integrated a next generation computer board. This unit is protected by a Pelican military-spec carrying case and a 1-year warranty is standard.


More information online: ilmt.co/PL/gpel


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New advanced NIR portable fuel analyser


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