By accurately and instantly pinpointing the presence of moisture, HCl, H 2 S and other impurities, the tunable diode laser (TDL) based gas analyzer (photo) is able to provide significant benefits, including the prevention of foreshortened lifespan of costly catalysts, enhanced assurance or product quality, reduced turnaround recovery times and avoidance of unscheduled shutdowns. TDLs emit in the near infrared at wavelengths that can be absorbed by the gas being measured. For H 2 S analysis, for example, the TDL-based analyzer measures sour gas headed for processing and sweetened gas coming out. Because it is faster than conventional techniques, process control is improved by instantly letting operators know how much processing is needed. Each unit is preset at the factory, so it is truly "plug and play" and requires little training, says the firm. — SpectraSensors, Inc., Rancho Cucamonga, Calif.
Advanced Laser-Based Gas Analyzer Can Improve Process Control
| By Chemical Engineering