The experiment of fluidization in packed column was determined by using air as the conveying media. The fluidized bed is when the air make the solid to behave like a fluid. For this experiment, two columns are use which one column are filled with sand and the other one filled with aluminum oxide. The bed height of aluminum oxide is 100 mm and have a particle size about 250 micron (mesh 60). The minimum fluidization velocity is used to determine the pressure drop. As mentioned above, when the solid behave like a fluid the bed is at fluidize state. So, minimum fluidization occur when the aluminum oxide start to far apart with each other and behave like a fluid. The experiment with different air flow rate between 2.0 to 20.0 L/min with 1 L/min
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This is because, the flow rate is too slow but there is an increment in experimental pressure drop. The condition of Aluminium Oxide in bed unit is same for 3.0 L/min,4.0 L/min,5.0 L/min and 6.0 L/min as no any movement being observed .At 7.0L/min, the bubbles of particles is being observed and at 7.0 L/min the minimum fluidization state occurred. The minimum fluidization where the value of pressure drop is almost equal with the increase of flow rate. The value of pressure drop during minimum fluidization is 0.85 kPa. From 2.0 to 8.0 L/min, the pressure drop is increase with increasing flow rate but after minimum fluidization velocity start to be constant although the flow rate increase. This is slightly equal with the fluidization theoretically idea where the pressure drop should be constant after the minimum fluidization since the solid particles are suspended in the flow up of the gas stream. The drag force was equal to the gravitational force since the weight of aluminum oxide is buoyed by air. Starting from Q = 12.0 to 20.0 L/min, the pressure start to increase which mean the drag force was not equal to the gravitational force because of the significance of the fractional drag of fluid at the wall of the …show more content…
This situation showed that overflow fluid pass through the bed in the bubbles form where the bubbles move up to the bed and break on the surface. As the velocity increase, the bubble grow larger and cause the solid materials to move speedily and result in higher vertical tube. In this bubbling mode, the pressure drop of experimental and theoretical do not show the same orientation. Based on Reynolds number two equations are used to calculate theoretical pressure drop. Blake Kozeny equation is used for the flow rate, Q = 2.0 to 13.0 L/min since the Reynolds number is less than 10 while Ergun equation used for the flow rate at 14.0 L/min and above which the Reynolds number more than 10 but less than 104. The data of bed height and pressure drop are taken. The data collected is used for the calculation of velocity and theoretical pressure drop by using Ergun equation. According to the equation, when the fluid velocity increase which means flow rate, the pressure drop will also increase. Ergun equation also figure out that the pressure drop for theoretically is lower than experimentally. The pressure drop depends on fluid velocity but also packing size, length of bed and fluid
This is because, the flow rate is too slow but there is an increment in experimental pressure drop. The condition of Aluminium Oxide in bed unit is same for 3.0 L/min,4.0 L/min,5.0 L/min and 6.0 L/min as no any movement being observed .At 7.0L/min, the bubbles of particles is being observed and at 7.0 L/min the minimum fluidization state occurred. The minimum fluidization where the value of pressure drop is almost equal with the increase of flow rate. The value of pressure drop during minimum fluidization is 0.85 kPa. From 2.0 to 8.0 L/min, the pressure drop is increase with increasing flow rate but after minimum fluidization velocity start to be constant although the flow rate increase. This is slightly equal with the fluidization theoretically idea where the pressure drop should be constant after the minimum fluidization since the solid particles are suspended in the flow up of the gas stream. The drag force was equal to the gravitational force since the weight of aluminum oxide is buoyed by air. Starting from Q = 12.0 to 20.0 L/min, the pressure start to increase which mean the drag force was not equal to the gravitational force because of the significance of the fractional drag of fluid at the wall of the …show more content…
This situation showed that overflow fluid pass through the bed in the bubbles form where the bubbles move up to the bed and break on the surface. As the velocity increase, the bubble grow larger and cause the solid materials to move speedily and result in higher vertical tube. In this bubbling mode, the pressure drop of experimental and theoretical do not show the same orientation. Based on Reynolds number two equations are used to calculate theoretical pressure drop. Blake Kozeny equation is used for the flow rate, Q = 2.0 to 13.0 L/min since the Reynolds number is less than 10 while Ergun equation used for the flow rate at 14.0 L/min and above which the Reynolds number more than 10 but less than 104. The data of bed height and pressure drop are taken. The data collected is used for the calculation of velocity and theoretical pressure drop by using Ergun equation. According to the equation, when the fluid velocity increase which means flow rate, the pressure drop will also increase. Ergun equation also figure out that the pressure drop for theoretically is lower than experimentally. The pressure drop depends on fluid velocity but also packing size, length of bed and fluid