A method for the online analysis of a vapour phase process stream

A method for the on-line analysis of a process stream, which process stream is a feedstream to or an exit stream from a steam reformer, which process stream has a temperature of at least 200DEG C, the components of which process stream are in the vapour phase, which method comprises: (a) taking a sl...

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Bibliographic Details
Main Authors LIGHTOWLERS, DAVID, THOMSON, ALASDAIR IAIN
Format Patent
LanguageChinese
English
Published 16.03.2009
Subjects
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PHYSICS
TESTING
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Summary:A method for the on-line analysis of a process stream, which process stream is a feedstream to or an exit stream from a steam reformer, which process stream has a temperature of at least 200DEG C, the components of which process stream are in the vapour phase, which method comprises: (a) taking a slipstream from the process stream; (b) cooling the slipstream to a temperature above its dew point; (c) analyzing the cooled slipstream by near infra-red (NIR) spectroscopy to obtain a spectrum characterizing NIR-absorbing components of the process stream; and (d) correlating the spectrum obtained to established calibration models from NIR spectroscopy using chemometric techniques to determine the concentration of, and/or to determine the partial pressure of one or more of the NIR-absorbing components of the process stream.
Bibliography:Application Number: TW200897119861