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TEMPERATURE SWING ADSORPTION PROCESSES FOR GAS SEPARATION

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TEMPERATURE SWING ADSORPTION PROCESSES FOR GAS SEPARATION ( temperature-swing-adsorption-processes-for-gas-separation )

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silicalite-water adsorbent-HTF pair was selected based on detailed analyses of the heat and mass transfer processes in each stage. This Chapter uses the model developed in Chapter 2 to investigate the complete performance spectrum of the purification process in terms of product purity, process capacity, CH4 recovery, and operating energy requirement. These performance parameters are compared with those reported in the literature for existing purification processes. Methods to enhance product purity and reduce energy requirements are also investigated. 3.2 System design selection and results 3.2.1 Liquid HTF recirculation and absorption Detailed stage-wise fluid dynamics, heat and mass transfer modeling is described in Chapter 2; however, for the full process simulation, additional consideration must be given to gas solubility in water and absorption to ensure a realistic operation. The estimated stages times and the total cycle time used for the simulation are shown in Table 3.1. Table 3.1. Stage times and total cycle time selected for the full process simulation Stage Adsorption [s] Displacement of gas [s] Desorption [s] Cooling [s] Displacement of liquid [s] Purge [s] Total time [s] Time [s] 0.19 0.52 4.00 3.00 0.70 195.00 203.41 69

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TEMPERATURE SWING ADSORPTION PROCESSES FOR GAS SEPARATION

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