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H2O in refinery CCR unit recycle streams

A critical measurement for catalyst activity


On-line monitoring of the H2O concentration in the hydrogen recycle streams of continuous catalytic reformer (CCR) units enables refineries to control the chloride level required for optimum catalyst activity, and avoid excess levels of H2O that strip chloride from catalyst surfaces and forms HCl. This HCl can be transported to other downstream catalytic processes in the net hydrogen gas from a CCR, poisoning catalysts and causing unwanted by-product formation. The corrosive nature of the gas stream poses a major problem for H2O measurement devices that require direct contact of a sensor element with the process gas and entrained contaminants.


A new application note describes the use of tunable diode laser absorption spectroscopy (TDLAS) analyzers for monitoring H2O in CCR hydrogen recycle gas streams. TDLAS analyzers perform non-contact, laser-based measurements avoiding the corrosive damage that leads to frequent replacement of devices using direct contact sensors. Download a copy of this application note and visit the Refinery Application page on our website to view application notes on other TDLAS measurements in refinery gas streams.