CHARACTERIZATION THE PHYSICAL PROPERTIES AND HYDRODYNAMICS FIXED BED OF ZEOLITE PARTICLE
Fixed bed are used in chemical industry such us catalytic reactors, absorbers, desorption, heat exchanger, drying and separation process. Fixed bed reactors are consist of a vessel filled with particles which can be catalyst, adsorbent, or carbon active. One of the catalyst used as fixed bed particl...
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| Format: | Final Project |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/67277 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Fixed bed are used in chemical industry such us catalytic reactors, absorbers, desorption, heat exchanger, drying and separation process. Fixed bed reactors are consist of a vessel filled with particles which can be catalyst, adsorbent, or carbon active. One of the catalyst used as fixed bed particles are zeolite. The characteristics of the zeolite particles affect the flow pattern in the fixed bed. The purpose of this research is to study hydrodynamic behavior of a fixed bed composed of irregularly shaped zeolite particles.
The characterization of zeolite particles includes measurement of particle diameter, bulk density, void fraction, sphericity and roundness. Sphericity and roundness of zeolite particles were measured using a geometric method using a handphone camera. The zeolite particles were used as a fixed bed in a column with a height of 32.5 cm and variations in diameter of 1.67, 1.87 and 2.63 cm for the pressure drop measurement experiment. Zeolite particles used were varied based on their size into Zeolite 1 (-5.00/+3.36 mm), Zeolite 2 (-3.36/+2.00 mm), and Zeolite 3 (-2.00/+1, 00 mm) with variations in bed height of 10, 15, and 20 cm. Air was used as a fluid through a fixed bed with flow rates of 650, 1350, 2500 and 5000 mL/min at pressure 1.0 atm and temperature 27 oC. The results of the pressure drop measurements are used to estimate the sphericity, viscous and inertia constants in the Ergun Equation.
From the geometric measurements, zeolite particles have sphericity in the ranges 0.59 to 0.66 and roundness in the ranges 0.17 to 0.19. The sphericity obtained from geometric measurements are different from the sphericity estimated using the Ergun Equation which is in the ranges 0.30 to 0.59. In addition, there is a difference between the pressure drop from the measurement results and predictions using the Ergun Equation with an average error in the ranges 42.51% to 69.19%. The correlation of pressure drop was adjusted by modifying the viscous constant and inertia of the Ergun Equation based on experimental data. It was found that, the viscous constant and inertia of the Ergun Equation decreased with the increase in the ratio of column diameter to particle diameter.
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