flare monitoring - 40 CFR 60 Subpart
plant steam methane reformer (SMR)
for catalyst protection
monitoring of sulfur impurities
feed gas to hydrogen plant
Model 6400-TSG system uses UV-Fluorescence
detection technology to analyze total
sulfur concentration in gas samples.
It consists of a Model 6400E UV Fluorescence
Sulfur Dioxide Analyzer, a Flame Combustion
Converter Module (FCCM), and associated
sample handling required per application.
The system is housed in a freestanding
NEMA-4 or NEMA-4X rated enclosure with
approved purge, making it suitable for
operation in Class I Div 1 (Zone 1)
or Class I Div 2 (Zone 2) environments.
and percent analysis ranges available
analysis - fast response time and
no switching valves
preventative maintenance for less
pure oxygen required as a utility
and multiple sequenced stream configurations
configurations available using integral
I Div 1 (Zone 1) and Class I Div 2
(Zone 2) configurations available
Theory of Operation
undesirable sulfur compounds present
(i.e. H2S, DMS, COS, CH3SH, CS2, etc)
are converted into sulfur dioxide (SO2)
under precisely controlled temperature
and flow conditions.
+ hv¹ -> SO2*-> SO2 + hv²
When SO2 is exposed to UV light energy,
hv1, it creates an "excited"
form of sulfur dioxide, SO2*. A molecule
in a high, vibrational level of the
excited state, SO2*, will quickly fall
to its lowest vibrational level by losing
energy to other molecules through collision.
Fluorescence occurs when the molecule
returns to its electronic ground state.
The intensity of the emitted light,
hv2, is directly proportional to the
total sulfur content found in the sample.
converted sample gas is dried, then
fed to the Model 6400E UV Fluorescence
Analyzer where the SO2 Analysis takes
place and is conveniently displayed
as Total Sulfur.