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equilibrium-adsorption-isotherms
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Mathematical model and energy analysis of ethane dehydration in two-layer packed-bed adsorption
, Article Particuology ; Volume 47 , 2019 , Pages 33-40 ; 16742001 (ISSN) ; Hosseini, S. H ; Ahmadi, G ; Olazar, M ; Sharif University of Technology
Elsevier B.V
2019
Abstract
The 3A zeolites are excellent adsorbents for industrial-scale gas dehydration because of the low energy required for regeneration and ease of operation. A computational study of the dehydration of an industrial feed stream containing ethane and water was performed using an in-house code that included an appropriate equilibrium adsorption isotherm. The validated computational model was used to examine the impact of particle size on the process dynamics and the corresponding pressure drop. The water concentration along the adsorption column was also investigated. To increase the process capacity, the packed adsorption bed was divided into two distinct layers, which were operated with different...
Removal of Cu 2+ , Cd 2+ and Ni 2+ ions from aqueous solution using a novel chitosan/polyvinyl alcohol adsorptive membrane
, Article Carbohydrate Polymers ; Volume 210 , 2019 , Pages 264-273 ; 01448617 (ISSN) ; Soltanieh, M ; Mousavi, S. M ; Heydarinasab, A ; Sharif University of Technology
Elsevier Ltd
2019
Abstract
The chitosan/poly vinyl alcohol membrane was modified by addition of some amine group to the membrane structure utilizing polyethyleneimine (PEI) in order to increase ionic metals adsorbent properties of the membrane. The removal percentage of the modified membranes was compared with the pristine membrane and activated carbon as common adsorbents. The membranes were characterized by FTIR, SEM, swelling degree and porosity measurement. The removal percentage of the membrane containing 0.5 wt.% PEI was more than 60% higher than the activated carbon and more than 40% higher than the pristine membrane. The modified membrane showed excellent adsorption capacity of 112.13, 86.08, and 75.5 mg/g for...