Measurement and Testing

  • Trace H2S analysis in complex gas mixtures

Trace H2S analysis in complex gas mixtures

Dec 17 2019 Read 447 Times

Hydrogen  sulphide  (H2S)  is  a  very  flammable,  corrosive  and  toxic  gas,  with  a characteristic  odour  of  rotten  eggs. Even when present  at  low  trace-level  concentrations, H2S can  damage  equipment,  pipelines  and  lead  to catalyst poisoning. Therefore, it must be carefully monitored and controlled in industrial processes where it is generated or used.

Chromatotec®’s H2S MEDOR analyser measures H2S  in  gas  samples  at  trace-level  concentration  ranges  (0-1ppm). It  consists  of an  automatic  process  gas  chromatograph  (autoGC)  equipped  with  a sulphur  specific electrochemical wet cell detector (ED) which only reacts with sulphur compounds and provides excellent results down  to  1ppb.  All  compounds  have  a  linear  response  with  the  ED,  with  R2>  0.995.  Moreover,  theMEDOR® detectoris not affected by the moisture in the sample, which can be up to 100% relative humidity.

The H2S MEDOR   is   available   with   a dedicated   configuration   for   safe   and   hazardous   areas   (ATEX,   IECEx,   CSA   and   CSA international  certifications)  including  an  integrated  N2 generator.  Its  simplicity  for  online  application  in refineries  and  petrochemical  plants  is  achieved  thanks  to  its  flameless  detector for which no  hydrogen  is  required.  Specially designed for on-field deployment, this standalone solution includes a built-in nitrogen generator and a  touch  screen display  behind  the  front  door  of the wall-mounted  cabinet.  It  is  temperature controlled  for  outdoor installation to provide the best performance for operation from -10 to +55°C.

The versatile and robust H2S MEDOR analyser has been used for H2S measurement in a recycle gas stream composed of up to 60% of H2 as well as in reactor’s effluent gas with very high concentrations of COS (5000 ppm).

The  H2S  MEDOR  is  a  reliable,  simple  and  robust  turnkey  solution.  It  is  fully  autonomous  thanks  to its integrated gas generators which avoid the need for gas cylinders and embedded, internal calibration for automatic data validation. Moreover, this process analyser is designed to have very low maintenance requirements.

Reader comments

Do you like or dislike what you have read? Why not post a comment to tell others / the manufacturer and our Editor what you think. To leave comments please complete the form below. Providing the content is approved, your comment will be on screen in less than 24 hours. Leaving comments on product information and articles can assist with future editorial and article content. Post questions, thoughts or simply whether you like the content.

Post a Comment

Digital Edition

Petro Industry News Buyers Guide 2021

January 2021

In This Issue Fuel For Thought - Signal Group announces new senior appointment - Network of organisations committed to workplace launched - Ayalytical Instruments acquires Lawler Manufactur...

View all digital editions


European Gas Conference

Jan 26 2021 Virtual event

EUEC 2021

Feb 08 2021 Virtual & live stream


Feb 15 2021 Online

International Petroleum Week

Feb 23 2021 Online event

View all events