PORTABLE DEVICE FOR THE IN-LINE MEASUREMENT OF THE HYDROGEN SULFIDE CONCENTRATION OF AN OFF-GAS

摘要

The invention relates to a device and to a method for continuously measuring the hydrogen sulfide concentration of an off-gas by means of a detachable device suitable for being temporarily connected to equipment producing said off-gas, the method comprising a step of measuring the absorption of electromagnetic radiation by the off-gas. Said device and said method can be used in particular to measure the hydrogen sulfide concentration in an off-gas produced during a step of sulfiding a hydroprocessing catalyst.