Adsorption breakthrough

Our objective is to develop the continuous adsorption process for citrus oil processing. In this work, the adsorption breakthrough curves and desorption curves were analyzed to understand the adsorption-desorption behavior of citrus oil on a silica gel adsorbent inSC-C02. Acyclic adsorption-desorption process was developed and demonstrated for the removal of terpenes from orange oil. 

First results on n-complexation sorbents for desulfurization with Ag-Y and Cu(I)-Y zeolites have been reported recently [3,4]. In this work, we included the known commercial sorbents such as Na-Y, Na-ZSMS, H-USY, activated carbon and activated alumina (Alcoa Selexsorb) and made a direct comparison with Cu(l)-Y and Ag-Y which were the sorbents with n-complexation capability. Thiophene and benzene vapors were used as the model system for desulfurization. Although most of these studies can be applied directly to liquid phase problems, Cu-Y (auto-reduced) and Ag-Y zeolites were also used to separate liquid mixtures of thiophene/benzene, thiophene/n-octane, and thiophene/benzene/n-octane at room temperature and atmospheric pressure using fixed-bed adsorption/breakthrough techniques. These mixtures were chosen to understand the adsorption behavior of sulfur compounds present in hydrocarbon liquid mixtures and to study the performance of the adsorbents in the desulfurization of transportation fuels. Moreover, a technique for regeneration of the adsorbents was developed in this study [4]. 

To design and develop PSA process, detailed analysis of the fixed-bed dynamics must be preceded, because the key step to developing an optimum PSA process lies in the design and operation of the adsorption step. Also, on the condition that the theoretical models of the adsorption breakthrough can predict its experimental results well, it can be used to investigate the breakthrough dynamics in a bed and predict PSA performance without any specific experiment. 

Figure 5. Simulated adsorption breakthrough curves of total protein and HSV-1...

Figure 8.4 Adsorption breakthrough curves of alachlor on activated carbon numbers on the curves indicate the number of the...

Grnbner and W, A. Bergess, Calculation of Adsorption Breakthrough Curves in Air Cleaning... 

Figure 18-15. Adsorption and desorption of CO2 on activated carbon (A) adsorption breakthrough curves illustrating constant pattern behavior, (B) desorption (elution) curves illustrating proportional pattern behavior, Vs pgj, = 4.26 cm/s. Reprinted from Weyde and Wicke (19401.

Figure 6. Multicomponent adsorption breakthrough curves of a mixtures of nC5/nC6/N2/iC, in pellets of 5A zeolite. Feed mole fraction a) nC 2.6% nC6 1.2% b) nC, 3.2% nCa 2.7%. Points are experimental data. Lines are model results.

Figure 8. Multicomponent adsorption breakthrough of propylene/propane mixture on 13X zeolite. Points are experimental data from Jarvelin and Fair [21]. Lines are model predictions.

Park, I, and Knaebel, K.S., Adsorption breakthrough behavior Unusual effects and possible causes, AIChE J., 38(5), 660-670 (1992). 

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