Positron Emission Tomography PET , Particle Tracking PEPT and Profiling PEP

Positron Emission Tomography (PET), Particle Tracking (PEPT) and Profiling (PEP) 

Application of PET to problems of industrial interest has only occurred recently. PET has been shown to be capable of monitoring turbulent 

The velocity and hold-up distribution of the solid phase in a liquid-solid riser has been studied with radioactive particle tracking and computed tomography (CT).[ 1 The goal of this research was the development of an understanding of the variables affecting the performance of liquid-solid risers, and of fundamentally-based scale-up rules. An improved PEPT system has recently been developed, capable of continuously following the 3D trajectory of a radiotracer particle (as small as 500/um) moving at 0.1 ms with a resolution of 5 mm. The system has been used to measure in situ flow patterns of solids in a gas-solids Interconnected Fluidised Bed reactor. 

Single photon emission computed tomography (SPECT) was used by Kantzas et to monitor chemical processes. In SPECT imaging, a 

The Positron Emission Profiling (PEP) detector is shown in Fig. 2. It has been designed to be flexible so that it can be used with a variety of different sizes of reactors measurements can be carried out on reactors having lengths between 4.0 cm and 50 cm and diameters of up to 25 cm. The detector consists of two banks, each containing an array of sixteen independent detection elements, and is mounted horizontally, with the reactor and furnace placed between the upper and lower banks. Each detection element comprised of a bismuth germanium oxide (BGO) scintillation crystal coupled to a photomultiplier. The detection elements are situated in a frame, which allows adjustment of the overall detector dimensions when required. 

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