After cooling and quenching the off gas from the reduction reactor, the H2S is selectively absorbed from the tail gas by means of an amine solvent or absorber. The AMETEK Western Research Model 931/932 analyzers are used to measure H2 and H2S at the inlet to the absorber.
The AMETEK Model 931 uses AMETEK’s proprietary high-resolution UV technology in a dual-beam, dual-wavelength configuration and no-moving parts design. Instead of using a filter/chopper wheel to alternate between measure and reference wavelengths, the Model 931 uses a fixed optical configuration and pulsed UV lamps. This design leads to increased light throughput, reduced noise levels, and reduced maintenance. The dual beam configuration, combined with the reference measurement, ensures low noise performance with minimal baseline and span drift.
The AMETEK Model 932 uses AMETEK’s proprietary high-resolution UV technology in a dual-beam design and incorporates a filter wheel that allows the measurement of up to five components.
The AMETEK Model 934 is a rugged analyzer adapted from the Model 931/932 UV analyzer platform for measurement of Hydrogen in Tail Gas Treatment Unit (TGTU ) applications where the UV (H2S) is not required.