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Adsorption Separation (adsorption + separation)
Selected AbstractsAdsorption separation of terpene lactones from Ginkgo biloba L. extract using glass fiber membranes modified with octadecyltrichlorosilaneJOURNAL OF SEPARATION SCIENCE, JSS, Issue 11 2005I-Fang Su Abstract In this study porous glass fiber membranes were modified by reaction with octadecyltrichlorosilane to form C18 hydrophobic membranes. The contact angle and the CH2 vibration bands at 2855 and 2920 cm,1 found by FTIR measurements verified the successful immobilization of C18 groups on the glass fiber membranes. The resulting C18 hydrophobic membranes were used to adsorb terpene lactones from crude Ginkgo biloba L. extracts. In batch adsorption processes, the modified C18 membranes exhibited a better adsorption performance than commercial C18 solid phase extraction adsorbents. Different desorption solvents were tested and ethyl acetate was found to preferentially desorb terpene lactones from the modified C18 membranes. In flow adsorption experiments at 1 mL/min, terpene lactone contents higher than 6 wt% (the standardized content) could be achieved in the elution step using ethyl acetate. [source] Molecular simulation of separation of CO2 from flue gases in CU-BTC metal-organic frameworkAICHE JOURNAL, Issue 11 2007Qingyuan Yang Abstract In this work, a computational study was performed on the adsorption separation of CO2 from flue gases (mixtures of CO2/N2/O2) in Cu-BTC metal-organic framework (MOF) to investigate the applicability of MOFs to this important industrial system. The computational results showed that Cu-BTC is a promising material for separation of CO2 from flue gases, and the macroscopic separation behaviors of the MOF were elucidated at a molecular level to give insight into the underlying mechanisms. The present work not only provided useful information for understanding the separation characteristics of MOFs, but also showed their potential applications in chemical industry. © 2007 American Institute of Chemical Engineers AIChE J, 2007 [source] Analysis of the reverse flow chromatographic reactorAICHE JOURNAL, Issue 9 2004Hugo S. Caram A reverse flow chromatographic reactor with side feed (RFCR) can be used to improve the conversion and selectivity for irreversible and reversible reaction systems beyond the values obtained from conventional steady-state reactors in the case where the reactants are more strongly adsorbed than the products. It is also simpler than conventional chromatographic, moving, and simulated moving beds and other systems that combine reaction and adsorption separation. The results of the study show the robustness and stability of the system, as well as its capacity to significantly improve conversion and selectivity for several reaction systems, including consecutive reactions. Simulation results of this mathematical model for the hydrogenation of 1,3,5-trymethylbenzene (MES) compare well with previous studies, using countercurrent moving-bed reactors and simulated countercurrent bed reactors. © 2004 American Institute of Chemical Engineers AIChE J, 50: 2266,2275, 2004 [source] Electrostatic-Field-Induced Enhancement of Gas Mixture Separation in Metal-Organic Frameworks: A Computational StudyCHEMPHYSCHEM, Issue 7 2006Qingyuan Yang Dr. Ordered microdomains with different electrostatic field strengths exist in certain metal-organic frameworks (MOFs; see picture), and the electrostatic interactions in MOFs can enhance the separation of some gas mixtures, demonstrating that MOFs have great potential for adsorption separations. [source] | ||||||||||