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
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The ability of advanced, laser-based sensors to detect moisture, hydrogen sulfide and other contaminants in gases can smooth the way for biogas as a resource for electric utilities. Wouldn’t it be great if some of the expensive green power programs you hear about actually worked? Experts and financiers are predicting it will take billions of investment dollars and decades to get any meaningful quantity of energy from alternative resources. Perhaps not. One of the oldest and most widespread forms of potential energy — methane gas — promises to give those efforts a sizable boost — right now. The main component of “natural gas,” methane is found in abundance in many places other than subterranean gas wells. Landfills, oil pipelines, pasturelands, forests and waste treatment plants all contain methane or the biomass from which methane can be formed. …
Tunable diode laser (TDL)-based analyzers (Fig. 1) are increasingly being used in these “pain-point” analytical applications to measure contaminants reliably while reducing maintenance and operating costs. TDL absorption spectroscopy uses a laser mounted behind a window that protects it from the wear and tear of caustic gas contents while enabling the analyzer to accurately and quickly read varying gas concentrations. The laser does not come into contact with the gas and calibration does not change or drift over time. Dependable H2O analysis. Impurities, such as H2O and corrosive acids found in many gas streams, are the nemesis of conventional sensors that are directly exposed to the gas stream and those harmful elements. Over time—and sometimes within a few weeks—those probes become damaged and inaccurate, resulting in costly repair or replacement. In the meantime, corrosion and contamination from problematic …
PinPoint Precision - Sam Miller, SpectraSensors Inc., USA, examines how a TDL based analyser pinpoints moisture intrusion and trace H2S levels in refinery operations.
The emergence of tunable diode laser (TDL) based technologies has been a major development in many industries, and has created valuable opportunities for refineries and chemical plants to maximise productivity while avoiding high maintenance costs. By instantly and accurately pinpointing the presence of moisture, HCl, H2S and other impurities in feedstock and fuel gas streams, the TDL based gas analyser is able to provide significant benefits. Among those are the prevention of foreshortened lifespan of costly catalysts, enhanced assurance of product quality, reduced turnaround recovery times, and avoidance of unscheduled shutdowns. What is a TDL? A tunable diode laser is a type of semiconductor based laser that can be tuned to optically select a very specific wavelength (or colour) of light. NASA’s jet propulsion laboratory (JPL) developed long wavelength (near infrared) tuneable lasers and processor controls that …
Ultra-fast and highly accurate, a new Tunable Diode Laser analyzer technology is replacing conventional sensors at refineries and gas processors, saving on maintenance while providing enhanced control over process integrity.
Tunable-Diode Laser-based moisture sensors help ensure long catalyst life, reduce operational costs, and offer the lowers overall cost of ownership. Refineries and chemical plants have long been subjected – perhaps unwittingly - to high costs incurred from failure of conventional moisture analyzer 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 directly to harsh elements 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. The innovative employment of tunable …