Abstract
The adsorption process for separation of meta-xylene from xylene mixture on binder-free nanocrystalline and microcrystalline zeolite Y modified with sodium cation was investigated in the liquid phase. X-ray diffraction, scanning electron microscopy (SEM), nitrogen adsorption and in situ Fourier transform infrared (FTIR) spectroscopy were also performed to study the type of adsorbed species and their thermal stabilities. The adsorption process was carried out at temperature of 110–160 °C and pressure of 6–10 atm. The effect of zeolite water content on the adsorption process was investigated. The influence of SiO 2/Al 2O 3 ratio on selectivity factor of meta-xylene to other C 8 aromatic isomers was also studied. The adsorption isotherms for each isomer of C 8 aromatics and desorbents illustrated the typical Langmuir type. It was observed that selectivity of meta-xylene was increased with decreasing the particle size of crystalline zeolite Y from micro to nano-scale. The best selectivity factor of meta-xylene to para-xylene, ortho-xylene and ethylbenzene on nanocrystalline zeolite Na-Y reached to be 2.90, 3.16 and 6.88, respectively, and compared with those obtained with microcrystalline zeolite Na-Y. Desorbents like toluene and indan were also tested to optimize the process.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
