LaserCEM – CEMS Analyser

LaserCEM®

Continuous Emissions Monitoring System

The LaserCEM® is a complete pre-calibrated multi-component analyser based on the enhanced IR Laser Spectroscopy method OFCEAS. The LaserCEM® features the association of a performant spectrometer with a Low Pressure Sampling (LPS®) system (50-100 mbar absolute) for the online analysis of several key gases in industrial, environmental and OH&S applications.

The association of the OFCEAS and LPS technologies enables high spectral resolution, interference free, fast and sensitive analysis, regardless of the matrix of the gas to be analysed. Thanks to the low sampling pressure (100-50 mbar), the LaserCEM® system fits a large range of applications without the need to heat nor dry the sample prior analysis reducing considerably installation, operation and maintenance related costs.

The LaserCEM® is a true direct extractive CEMS developed and patented worldwide by AP2E, member of DURAG group, and compliant to standard EN 15267-3 : 2008 and QAL 1 de EN 14181 .

Technical datasheet LaserCEM

Brochure emission monitoring

Guidance book EU regulations

LaserCEM® Exclusive features

True Direct Extractive CEMS (No sample treatment) 50 – 100 mbar abs. sampling pressure removes any risk of chemical adsorption, desorption and condensation along the sample line.	Low maintenance – The LPS® system allows flow low rates within 3 and 9l/h without affecting the response time and reducing considerably dust and materials build-up.
Interferences Free – OFCEAS technology provides exceptional selectivity, enabling simultaneous monitoring of multicomponent without interferences, regardless of the gas matrix.	Ease of integration – The LaserCEM® allows digital (Ethernet, RS485, RS232, ModBus) analogue and TDR IOs.
No Drift – The zero is contained in the signal, enabling automated and intrinsic zero drift compensation.	Field proven – The LaserCEM® is free of optical moving part and was designed and built strictly for industrial and on-board mobile applications.

LPS® – Low Pressure Sampling

Simplified Sampling
No Sample heated line required to prevent condensation for most applications: low power consumption, no related ongoing maintenance

Cost effective sampling solution for complex applications (multipoint CEMS, redundancy, long length of sample line…)

Standard LPS system (unheated) comply with ATEX standards

The low volume of sample extracted for the analysis prevent contamination of the sampling line and minimise dust buildup on filters
Direct Extractive
True Direct Extractive CEMS/Process analyser (no dryer or scrubber)

No risk of absorption/desorption typical of high SO2/SO3 application

The integrity of the sample is therefore ensured
High performances
High Spectral definition: Low pressure accentuate the gas fingerprint

Extremely fast response time

LaserCEM® Measured Gases

NO, NO2, NOx, SO2, CO, HCl, CO2, H2O, H2S, NH3, N2O, COS, SO3, CH4, HF

GAS	RANGE	LoD
SO2	0 to 25 ppm / 0 – 75 mg/m3	0.22 ppm
NO	0 to 60 ppm / 0 – 80 mg/m3	0.09 ppm
HCl	0 to 10 ppm / 0 – 15 mg/m3	0.01 ppm
NH3	0 to 10 ppm / 0 – 15 mg/m3	0.01 ppm
CO	0 to 60 ppm / 0 – 75 mg/m3	0.22 ppm
H2O	0 – 40% Vol.	0.1 %
O2	0 – 25% Vol.	0.5 %
CO2	0 – 20% Vol.	0.06 %
SO3	0 to 25 ppm / 0 – 80 mg/m3	0.20 ppm
N2O	0 to 100 ppm / 0 – 200 mg/m3	0.09 ppm
CH4	0 to 100 ppm / 0 – 75 mg/m3	0.11 ppm
NO2	0 to 25 ppm / 0 – 50 mg/m3	0.08 ppm
HF	0 to 10 ppm / 0 – 10 mg/m3	0.01 ppm

Response time < 10 seconds

No Zero /Span drift

LaserCEM® System Integration

Wall Mount Enclosure

Field proof Stainless Steel

Temperature controlled

Pressurised System

Built-in cooler

CEM Rack

AC instrument rack

Sliding shelves

IO terminals and glands plate

OFCEAS, CONTINUOUS INFRARED LASER SPECTROSCOPY TECHNOLOGY

Starting in 2012, AP2E, member of DURAG Group, launched the industrialisation of the ProCeas® and LaserCEM® online multigas analysers using OFCEAS* patented laser spectrometry. This analyser range is based on several innovations, providing very high performance in terms of response time (less than a few seconds), accuracy (wide dynamic range from ppb to %) and reliability (no drift, 5 years MTBF)

The OFCEAS technology essentially differs from the CRDS (Cavity Ring Down Spectroscopy or Spectroscopy by resonance damping time) technology by its feedback principle: a part of the emitted radiation is returned from the chamber to the laser, enabling the tuning of the laser and the cavity resulting a resonance phenomenon. With a volume of only 15 cm3, the measuring cavity or cell is equipped with mirrors whose reflectivity exceeds 99.99%, providing an optical path between 1 and 10 km (approx. 10 meters in conventional technologies). The immediate consequence of this phenomenon is the identification of very intense absorption peaks with a very narrow spectral width. Given that the source used is a continuous laser, the system presents very high measurement stability: there is no zero drift and no need for new calibrations.

Optical Feedback Cavity Enhanced Absorption Spectroscopy: technology developed and patented by the University Joseph Fourier (France), coupled to a Low Pressure Sampling(100 mbar absolute) developed and patented worldwide by AP2E, for the on-line analysis of different gases. By the end of 2010, after two years of R & D studies, the AP2E ProCeas®was the award recipient of the USA “R & D 100” which rewards the 100 most innovative global technologies of the year.

LaserCEM® – Tailored to TODAY’s CEMS requirements

Typical Applications

Continuous Emissions Monitoring

In coal and gas fired power stations, cement kiln, foundry, paper mills… Stringent regulatory requirements for emission monitoring and reporting. The LaserCEM® enables efficient and flawlessly compliance for a large range of contaminants.

Gas Treatment Center

For DeSOx, DeNOx, Scrubbers, catalytic reactors and particulate filters, the LaserCEM® provides real-time measurement to optimize removal efficiency resulting in significant savings of material and to less maintenance for plant operators.

Large combustion Plants

With the announcement of the continuous measurement of SO3 (sulphur trioxide) at the exit of combustion units, Ap2E along with DURAG group, represent the link from an industrial point of view between regulatory measurements and optimising production processes. If SO2 is now properly measured, it does not fully reflect the sulphur emissions from combustion units subject to this requirement. In the presence of oxygen, SO2 does in effect form sulphur trioxide (SO3), a gas that is much more corrosive than SO2. And other chemical phenomena occur, particularly in denitrification (DeNOx), which in the presence of ammonia may lead both to an overconsumption of ammonia and to filter blockages. Not measuring SO3 entails the under estimation of sulphur emissions, and also additional maintenance costs and over-consumption of reagents. To have continuous and precise knowledge of the SO2 / SO3 couple enables the operator to choose the controlling conditions for limiting the formation of SO3 and its indirect costs.

Waste Incinerators

Fast response time and high reliability in harsh conditions of operations makes the LaserCEM® a powerful optimisation tool for waste recycling facilities (incinerator, water treatment plant).

SCR and SNCR Selective non-catalytic and catalytic reductions are designed to reduce the emissions of NOx by injecting ammonia is directly injected at the combustion chamber exhaust. This process causes the nitrogen oxides to react with the ammonium and turn into nitrogen and water. The LaserCEM® is suited to upstream and downstream SNCR/SCR monitoring and provides plants operator with accurate data to control NH3 slip and NOx regulatory emissions while optimising the denitrification process with upstream NOx measurements.

GTCs and flue gas scrubbers reduce the emissions of acid gases such as HCl and SO2 with pulverised lime powder or solutions while the discharge of heavy metals and organic pollutants is controlled with the addition of activated carbon. Online monitoring of O2, SO2, HCl and H2O upstream of the GTC allows reducing the quantity of reagents injected. The LaserCEM® has the benefit of an extremely fast response time.

More applications

LaserCEM®/ProCeas® user references

LaserCEM®

LaserCEM® Exclusive features

LPS® – Low Pressure Sampling

Simplified Sampling

Direct Extractive

High performances