Proceas® the new generation of analyzers for gas traces in hydrocarbons

Accurate and low detection limit
No cross interferences
Low maintenance & no drift
Online & fast response time

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Application note Gas traces in hydrocarbons

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Nos applications

Why do you need to control traces in hydrocarbons processes?

In many petrochemical applications, some gas components can be found at trace level. Their concentrations can fluctuate over time, and are depending on process parameters, or process feed.

Species like H2S, NH3, or H2O, can be considered as impurities (corrosive, toxic, etc.), and are often tracked in these gas matrices to insure the quality of the final gas product and the efficiency of the production process.


Optical Feedback Cavity Enhanced Absorption Spectroscopy and Low Pressure Sampling

The ProCeas® uses the patented OFCEAS technology, based on extractive absorption spectroscopy.This laser based technology is able to measure gases down to ppb levels of concentration, with an unforeseen quality of measurement in terms of accuracy and repeatability. OFCEAS principle combined with Low Pressure Sampling (<30 mbar absolute) grants an enhanced gas selectivity, and therefore are not impacted by cross interferences between gases even in hydrocarbons matrices.


ProCeas® has an integrated self-calibration of the measurement system, featuring no zero and span drift over time. ProCeas® is able to analyze a large range of gases with limited maintenance costs.

Key features

No cross-interferences
Highly sensitive
Low detection level (ppb)
No Zero drift and no Span drift
No regular calibration required
Multigas analyser possibilities (H2S, NH3, H2O, etc.)
Fast response time (T10-90 starting from 3 seconds)
Low sampled volume and low fouling
ATEX enclosures available


Analytical specifications

Proceas® trace analyzer in hydrocarbons

Is a complete pre-calibrated single or multicomponent (H2S, NH3, H2O etc.) laser infrared spectrometer for measurement of impurities.

Impurities Rangea LODb
 H2S on request <0,05 ppm
NH3 on request <0,05 ppm
H2O on request <0,05 ppm
C2H2* on request <0,05 ppm

a adjustable range on request
b limit of detection 3 sigma 60 seconds
* in pure ethylene (100% C2H4)

Gas backgrounds examples:

  • Coke gas (60%H2, 10%N2, 7%CO, 3%CO2, 20%HC)
  • Pulp and paper (75%N2, 10%CO2, 5%O2; 1%CO, NOx, SO2)
  • And many other hydrocarbons applications
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Application note Gas traces in hydrocarbons

Suivez ce lien pour voir toutes

Nos applications