The Influence of Si/Al ratio on the Aromatic Adsorption from Aromatic/Alkanes Mixture by BETA Zeolite
- سال انتشار: 1388
- محل انتشار: ششمین کنگره بین المللی مهندسی شیمی
- کد COI اختصاصی: ICHEC06_011
- زبان مقاله: انگلیسی
- تعداد مشاهده: 2351
نویسندگان
Department of Chemical Engineering, Islamic Azad University-Quchan branch, Quchan, Iran
Department of Chemical Engineering, Amirkabir University of Technology, Tehran, Iran.
Department of Chemical Engineering, Amirkabir University of Technology, Tehran, Iran.
Department of Chemical Engineering, Islamic Azad University-Quchan branch, Quchan, Iran
چکیده
In this work, adsorption of benzene from benzene/n-hexane and benzene/n-heptane was studied by two types of H-BETA zeolite with Si/Al ratio 11.5 and 24.5. Benzene was adsorbed of these mixtures which have 0.5% up to 10% mole fraction of benzene by batch technique in ambient temperature, and benzene concentration in binary mixture was measured by gas chromatography (GC). H-BETA zeolite has active site in its surface, this active site which has charge of the electron interact with p electron in benzene causes the heat of adsorption to increase. Si/Al ratio detects the number of active site in zeolite surface. In the other hand, increased active sites in H-BETA zeolite decline entropy of adsorption. Therefore, free energy of mixing defines the potential of adsorption in H-BETA zeolite. As the results indicated in all mixtures, benzene was adsorbed better than n-hexane and n-heptane on H-BETA zeolite surface, and separation factors are rather than 20. H-BETA zeolite with Si/Al = 24.5 has separation factor higher than H-BETA zeolite with Si/Al= 11.5 in similar mixture. For example, the separation factor in benzene/n-hexane mixture for H-BETA zeolite with Si/Al = 24.5 is near 50, and for Si/Al =11.5 it is 20.کلیدواژه ها
BETA zeolite, Aromatic adsorption, Separation factor, Liquid mixtureمقالات مرتبط جدید
اطلاعات بیشتر در مورد COI
COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.
کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.