Local Mass Transfer Optical Fiber Probe
Optical fiber probe can be used for local mass transfer measurements at different axial locations in a slurry bubble column reactors. These probes are low-power, portable devices that are highly sensitive and stable. The tip of the probe is made of a very thin film of a sol-gel coating that does not consume any oxygen and hence provides continuous contact with the sample. The probe is connected to a unit containing a light source and spectrometer through an optical fiber. This unit is further connected to a computer through an integrated A/D converter and a USB interface. The light source sends light through the optical fiber to the probe tip at 475nm. The dissolved oxygen concentration is measured by measuring the florescence intensity of the light reflected (at 600nm) by the probe tip. The optical fiber probe can be used with viscous samples, and are not affected by changes in the pH of the sample.
