Local liquid velocity measurement of trickle bed reactor using digitial industrial X-ray radiography

<p>"Trickle Bed Reactors (TBRs) are fixed beds of particles in which both liquid and gas flow concurrently downward. They are widely used to produce not only fuels but also lubrication products. The measurement and the knowledge of local liquid velocities (VLL) in TBRs is less which is essential for advancing the understanding of its hydrodynamics and for validation computational fluid dynamics (CFD). Therefore, this work focused on developing a new, non-invasive, statistically reliable technique that can be used to measure local liquid velocity (V_LL) in two-dimensions (2-D). This is performed by combining Digital Industrial X-ray Radiography (DIR) and Particle Tracking Velocimetry (PTV) techniques. This work also make possible the development of three-dimensional (3-D) V_LL measurements that can be taken in TBRs. Measurements taken through both the combined and the novel technique, once validated, were found to be comparable to another technique (a two-point fiber optical probe) currently being developed at Missouri University of Science and Technology. The results from this study indicate that, for a gas-liquid-solid type bed, the measured V_LL can have a maximum range that is between 35 and 51 times that of its superficial liquid velocity (V_SL). Without the existence of gas, the measured V_LL can have a maximum range that is between 4 and 4.7 times that of its V_SL. At a higher V_SL, the particle tracer was greatly distributed and became carried away by a high liquid flow rate. Neither the variance nor the range of measured V_LL varied for any of the replications, confirming the reproducibility of the experimental measurements used, regardless of the V_SL. The liquid's movement inside the pore was consistent with findings from previous studies that used various techniques"--Abstract, page iii.</p>

Name thesis:degree_name

Ph. D. in Nuclear Engineering

Grantor

Missouri University of Science and Technology

Year dc:date.available

2016

Author dc:creator

• Mohd Salleh, Khairul Anuar

• Digital Industrial Radiography (DIR)
• Local Liquid Velocity (VLL)
• Particle Tracking Velocimetry (PTV)
• Trickle Bed Reactor (TBR)
• Trickle Liquid Hydrodynamic
• X-ray radiography
• Nuclear Engineering

Repository record dc:identifier

https://scholarsmine.mst.edu/doctoral_dissertations/2333

OAI identifier oai:identifier

oai:scholarsmine.mst.edu:doctoral_dissertations-3335