Hydrodynamics of a multi-stage counter-current fluidized bed reactor with down-comer for amine impregnated activated carbon particle system

Abstract In the present investigation, the hydrodynamic study on the four-staged fluidized bed reactor with solid and gas flowing in the counter-current direction has been carried out. The gas phase was air, and the solid phase was amine impregnated activated carbon. By changing the operating condition like weir height, solid flow rate, gas velocity and particle size, pressure drops were determined at the steady and stable operation of the column without loading and flooding. At the low velocity of gas (0.188 m/s) with maximum solid flow rate (4.12 kg/h) and maximum weir height (70 mm), the maximum pressure drop occurred in the column was 220 N/m 2 . The minimum pressure drop occurred in the column was 92.2 N/m 2 at high velocity of gas (0.353 m/s), with minimum flow rate of solids (2.15 kg/h) and low weir height of 30 mm. The maximum pressure drop occurred for lowest particle size (467 μm) at gas velocity (0.309 m/s) was 169.1 N/m 2 at 50 mm weir height and the minimum pressure drop occurred at the same condition for highest size particle size (635 μm) was 124.8 N/m 2 at the same weir height.

[1]  H. Kuo,et al.  Investigation of the bed types and particle residence time in a staged fluidised bed , 2006 .

[2]  K. Krishnaiah,et al.  Pressure drop, solids concentration and mean holding time in multistage fluidisation , 1982 .

[3]  Soojin Park,et al.  CO 2 Adsorption of Amine Functionalized Activated Carbons , 2009 .

[4]  Ivano Miracca,et al.  The staging in fluidised bed reactors: from CSTR to plug-flow , 2001 .

[5]  Armin D. Ebner,et al.  New Pressure Swing Adsorption Cycles for Carbon Dioxide Sequestration , 2005 .

[6]  C. R. Mohanty,et al.  Identification of stable operating ranges of a counter-current multistage fluidized bed reactor with downcomer , 2010 .

[7]  W. Daud,et al.  Study on the improvement of the capacity of amine-impregnated commercial activated carbon beds for CO2 adsorbing , 2012 .

[8]  Y.B.G. Varma,et al.  Pressure drop and solids holding time in multistage fluidisation , 1983 .

[9]  Deovaldo de Moraes,et al.  Removal of SO2 with particles of dolomite limestone powder in a binary fluidized bed reactor with bubbling fluidization , 2003 .

[10]  M. Judd,et al.  The design of downcomers joining gas-fluidized beds in multistage systems , 1978 .

[11]  W. Daud,et al.  Impregnation of palm shell-based activated carbon with sterically hindered amines for CO2 adsorption , 2013 .

[12]  Y.B.G. Varma,et al.  Pressure drop of the fluid and the flow patterns of the phases in multistage fluidisation , 1975 .

[13]  Jun Zhang,et al.  CO2 capture by adsorption: Materials and process development , 2007 .

[14]  K. Biswal,et al.  Statistical modeling and optimization of a multistage gas–solid fluidized bed for removing pollutants from flue gases , 2015 .

[15]  S. Rao,et al.  A study of stable range of operation in multistage fluidised beds , 1994 .