CEM India 2017

CEM India - Abstract

Abstract Title: The Benefits of Multi-Laser Analyzers in Continuous Emissions Monitoring
Abstract Type: Oral
Presenter Name: Mr Timothy Ho
Co-authors:Dr Ruth Lindley
Mr Neil McLaren
Mr Salvador Stoppani
Ms Elaine Campbell
Mr Koh YeeTiong
Company/Organisation: Emerson Automation Solutions
Session Choice: Continuous Emission Monitoring

Abstract Information :

Emerson specialises in the production of laser-based gas analyzers, capable of quantitatively measuring a range of components within a single system. To deliver this capability two different laser types are employed, Tuneable Diode Lasers (TDL) and Quantum Cascade Lasers (QCL). Emerson's patented laser chirp technique forms the basis for this technology. It is unique, provides superior performance and can be applied to both TDL and QCL lasers. The chirp technique enables high averaging of data, which greatly reduces noise giving high sensitivity, continuous measurements.

The combination of QCL, TDL and the chirp technique offers fast, high resolution spectroscopic analysis to detect and measure a wide range of molecules. One system can include up to six high-resolution lasers emitting in both the near and mid-infrared spectral regions, providing real-time gas measurement from sub ppm to percent level concentrations. Up to 12 gases can be measured simultaneously, even within complex gas mixtures. The systems have cold/dry and hot/wet sampling capability, negating the need for chillers to condition the gas sample prior to the analyser.

Emerson's laser based analyzer solutions have been successfully implemented over the last ten years in a range of applications including automotive, marine, and industrial emissions monitoring. The systems require no consumables and minimal maintenance, resulting in a low total cost of ownership.

Emerson have developed the CT5100C for the emissions monitoring market, with an integrated hot sample handling system and capability for up to 6 high resolution lasers for simultaneous measurement of NOx, CO, SO2, O2, CO2, NH3 and H2O. The CT5100C gas analyzer is progressing through the MCERTS certification programme for use in Europe. In North America we have a number of analyzers which have successfully completed RATA testing in accordance to the performance standards set out by the EPA in appendix B of 40 CFR part 60.
The features and benefits that laser technology can bring to the CEMS market will be presented. This will be supported by data recorded during field trails and testing in Europe and North America, to demonstrate the performance of laser technology in emissions monitoring.