Patent ID: 8411275
Filing Date: 2013-04-02
Classification: G01N

Abstract:
1. A method of monitoring hydrogen in a high temperature gas stream comprising: generating the high temperature gas stream, where the high temperature gas stream has a temperature greater than about 500° C.; placing a hydrogen sensing material in the high temperature gas stream, where the hydrogen sensing material is comprised of, contacting the hydrogen sensing material with a monitored stream, where the monitored stream is at least a portion of the high temperature gas stream, and where the monitored stream has a temperature greater than about 500° C., and illuminating the hydrogen sensing material with a light source emitting incident light; collecting exiting light, where the exiting light is light that originates at the light source and is transmitted or reflected by the hydrogen sensing material, and monitoring a plasmon resonance peak position based on a comparison of the incident light and the exiting light using absorption spectroscopy; and detecting hydrogen based on a peak shift of the plasmon resonance peak position, thereby monitoring hydrogen in the high temperature gas stream.