AbstractOn-line process measurement of the composition of gas streams in refining, fertilizer, and other manufacturingindustries is essential for the optimal operation of different process units within these facilities. Processanalyzers based on gas chromatography, mass spectrometry, and electrochemical technologies are commonly used in these facilities. However, process conditions for certain streams present major challenges for these traditional technologies. Techniques based on optical spectroscopy, including near-infrared (NIR), infrared (dispersive and Fourier transform), and Raman spectroscopy, can provide analysis solutions for these challenging stream conditions. Raman spectroscopy is particularly useful for streams containing homonucleardiatomic gases, such as H2 and N2. These gases are key components in many chemical processes involving the creation and use of syngas (H2, CO, and CO2), such as the manufacturing of ammonia and methanol. Hydrogen is also an essential feedstock for the hydrotreating, hydrocracking, and catalytic reforming of varioushydrocarbon …
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On-line, real-time moisture measurements in catalytic reformer hydrogen recycle gas streams help refineries assess catalyst condition and improve process control during normal operation, in-situ catalyst regeneration and dry down.
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
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. …
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 …