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Fiber-Optical Sensors: Basics and Applications in Multiphase Reactors

Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
Author to whom correspondence should be addressed.
Sensors 2012, 12(9), 12519-12544;
Received: 30 July 2012 / Revised: 7 September 2012 / Accepted: 7 September 2012 / Published: 13 September 2012
(This article belongs to the Special Issue Optical Fiber Sensors 2012)
This work presents a brief introduction on the basics of fiber-optical sensors and an overview focused on the applications to measurements in multiphase reactors. The most commonly principle utilized is laser back scattering, which is also the foundation for almost all current probes used in multiphase reactors. The fiber-optical probe techniques in two-phase reactors are more developed than those in three-phase reactors. There are many studies on the measurement of gas holdup using fiber-optical probes in three-phase fluidized beds, but negative interference of particles on probe function was less studied. The interactions between solids and probe tips were less studied because glass beads etc. were always used as the solid phase. The vision probes may be the most promising for simultaneous measurements of gas dispersion and solids suspension in three-phase reactors. Thus, the following techniques of the fiber-optical probes in multiphase reactors should be developed further: (1) online measuring techniques under nearly industrial operating conditions; (2) corresponding signal data processing techniques; (3) joint application with other measuring techniques. View Full-Text
Keywords: fiber-optical sensor; probe; multiphase reactor; local flow characteristics fiber-optical sensor; probe; multiphase reactor; local flow characteristics
MDPI and ACS Style

Li, X.; Yang, C.; Yang, S.; Li, G. Fiber-Optical Sensors: Basics and Applications in Multiphase Reactors. Sensors 2012, 12, 12519-12544.

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