matlab code of fixed bed adsorption
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Hi am Mohamed i would like to get details on matlab code of fixed bed adsorption
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#2
Fixed bed adsorption has become an industrial application frequently used in sewage treatment processes. Several low cost adsorbents have been studied for their applicability in the treatment of different types of effluents. In this study, the potential of activated carbon derived from sugarcane bagasse was studied for the removal of aqueous phenol in a fixed column. Sugarcane bagasse was thermally activated at 600 ° C in the absence of air. A series of batch experiments were performed to identify the appropriate adsorption isotherm. Both the Langmuir and Freundlich equilibrium isotherms were analyzed according to the data from the experiment and the related parameters were estimated. The results revealed that the Langmuir isotherm provides the best fit with experimental data. Fixed bed experiments were conducted and advance curves were plotted by varying the height of the activated charcoal bed. As a result, ideal penetration curves (IBC) were prepared and the bed capacity (BC), unused bed length (LUB), the time required for total bed depletion in infinite rapid adsorption TS and the penetration times Tb for each scenario.

The cyclic batch mode using fixed bed, as shown in the following figure, is widely used with gas and liquid feeds. Separation in a fixed bed is, in practically all practical cases, an unstable speed control process. This means that conditions at any particular point within the fixed bed vary with time. Adsorption only occurs in a particular region of the bed, known as the mass transfer zone (MTZ), which moves through the bed. Fixed bed adsorption applications, also called percolation, include the removal of dissolved organic compounds from water.

[Image: sAD_Fig011.gif]

Factors determining the number and arrangement of fixed beds include total feed flow rate, allowable pressure drop, energy demands, length of MTZ, adsorbent regeneration method and capital investment . To achieve a constant flow of product, most applications include at least 2 beds, so that one is in adsorption mode while the other is in regeneration mode (later in regeneration). Multiple beds would be used in parallel with a relatively high flow rate and a short MTZ length, while serial multiple beds would be used if the MTZ were long. For large flows and large MTZ lengths, there are likely to be several beds in series and in parallel.
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