A NEW LASER-based moisture analyzer, measuring trace moisture in process and speciality gases, has been introduced by SpectraSensors of California, a leading provider or optically orientated gas sensors for the industrial process and environmental monitoring markets. In the past, speciality gas suppliers and users have relied on electrochemical cells, gravimetric and other technologies to measure trace amounts of moisture in speciality gases in process streams. Gravimetric technology has provided excellent results, but can also be seen as slow, expensive and demanding of a great deal of expertise to operate. Now, however, a new H2O moisture analyzer is available that uses tunable laser diode (TDL) spectroscopy to provide highly accurate and virtually instantaneous measurements of trace amounts. Based on advanced NASA optical technologies, the new product could play an important role in industry. For the users of high-purity …
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Trace moisture measurement has critical importance for many petrochemical processes such as Olefin production. The SpectraSensors SS2100 analyzer, which has been developed to measure trace moisture in Olefins product streams based on wavelength modulation spectroscopy is presented. A differential measurement scheme is employed to eliminate the interference from background gases (e.g. ethylene and/or propylene). Moisture can be accurately measured in the 0 ~ 3 x 10 -6 range. A repeatability (3) of (5~10) 10-8 has been demonstrated for moisture detection in Ethylene and Propylene. An excellent repeatability (3) of (2~6) 10-8 has been successfully demonstrated for moisture detection in other hydrocarbons such as various Alkane. Demonstration experiments confirm the sensitivity and accuracy of the analyzer. Read More - Article Available in Chinese Only
To users of high-purity bulk nitrogen, hydrogen, dry air or other specialty gases, it is critical to stable operations that those gases are free of contaminants such as moisture. Specifications for maximum moisture allowed are often as low as the parts-per-million and even parts-per-billion levels. In the past specialty gas suppliers and users have relied on electrochemical cells, gravimetric and other technologies to measure trace amounts of moisture in specialty gases in process streams. Gravimetric technology provides excellent results, but it can be slow, expensive, and require a lot of expertise to run. Although electrochemical devices may perform with acceptable accuracy at first, the confidence level in their measurements soon becomes low, due to drift, the inability to read high concentrations of moisture. There is a tendency for those sensor probes to become desensitized by the gas streams …
A New Tunable-Diode Laser Analyzer Technology Helps to Prevent Catastrophic Ice Formation in LNG Liquefaction The presence of even trace amounts of H2O moisture of CO2 can threaten the integrity of processing equipment during compression and liquefaction of the natural gas due to ice formation. While CO2 can be leading indicator of H2O or vice versa, in any case, it is essential to have very fast detection to improve the life of the desiccant while maintaining product quality. In the LNG liquefaction process it is desirable to extend the life between regeneration of the mole sieve or to monitor performance of a glycol or amine contactor while avoiding contamination to the natural gas. This is done by checking the output of the bed or column in order to determine the breakthrough point (the exact point at which the …
Reliable NASA-based gas analyzer technology keeps natural gas producers aware of moisture content before entering El Paso Natural Gas Company Pipeline – helping producers avoid expensive shut-ins
TDL-Based Moisture Analyzer Offers High ROI via Advanced Detection of Water Intrusion of Refinery Catalysts
Tunable-Diode Laser-based moisture ana¬lyzers help ensure long catalyst life, reduce operational cost, and offer the lowers overall cost of ownership.
Refineries and chemical plants have long been subjected to high costs incurred from failure of conventional sensors to accurately read moisture intrusion in feedstocks and hydrogen recycle streams, vital to optimizing product yield and catalyst life. Because typical analyzers, such as those based on surface absorption or adsorption, employ sensors that are exposed to harsh contaminants in the streams they monitor, timely and accurate moisture readings may be disrupted within a relatively short period of time. The disruptive operational life leads to substantial costs that can range from exorbitant consumables and maintenance to conceivably hundreds of thousands of dollars for premature catalyst recharging or untimely interruption of continuous processes. Using tunable diode laser (TDL) technology has enabled the development of a new moisture technology called the laser-based spectroscopy moisture analyzer. Developed as a spinoff of NASA-JPL space technology …
ConocoPhillips is improving production at its onshore gas receiving facilities in Singapore with laser-based moisture analyzers from SpectraSensors in Rancho Cucamonga, CA. With offshore platforms pumping a million or more cubic feet of gas daily, the efficient receiving and distribution of onshore receiving facilities depend on accurate moisture analyzer readings. “The analyzers in the field gives you an early indication of how much moisture is in the gas, enabling quality control of the gas that is put into the pipeline at the receiving facility,” explains Amos Favorite, a moisture analyzer instrument specialist. Considered more dependable than conventional gas sensors, laser-based analyzers help eliminate maintenance and downtime.