IJE TRANSACTIONS A: Basics Vol. 29, No. 1 (January 2016) 1-7    Article in Press

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A. Eskandari, M. Jahangiri and M. Anbia
( Received: August 15, 2014 – Accepted: May 02, 2015 )

Abstract    In the present work, the nano-NaX zeolite and micro-NaX zeolite were synthesized via hydrothermal method. Then, the adsorption capacities and isotherms of pure gases CO2 and CH4 on the synthesized zeolite nanoparticles were determined at three temperatures of 288, 298 and 308 K and various pressures from 1 up to 20 bar. Adsorption capacities of CO2 on the nano-sized zeolites NaX were showed to be higher than CH4. The selectivity of CO2/CH4 of the nano-sized zeolites NaX was 5.47 at 288 K and pressure about 20 bar. The results of the experimental data follows the Langmuir-Frendlich adsorption isotherm. Reduction of the particle size from micrometer to nanometer results in increasing the adsorption capacity for carbon dioxide on the X zeolite nanoparticles about 28% (from 5.067 to 6.536 mmol/g) at 288 K and 20 bar.


Keywords    Adsorption, Carbon dioxide capture, Nanoparticle, nano-sized zeolite NaX


چکیده    در کار حاضر، نانو و میکرو زئولیت NaX با استفاده از روش هیدروترمال سنتز شدند. سپس ظرفیت های جذب و ایزوترم های گازهای دی اکسیدکربن و متان در زئولیت نانو ذره سنتز شده در سه دمای 288، 298 و 308 درجه کلوین و فشارهای مختلف1 تا 20 بار تعیین می شوند. نانوزئولیت NaX ظرفیت جذب دی اکسیدکربن بالاتری نسبت به متان نشان داد. انتخاب پذیریCO2/CH4 در نانوزئولیت NaX در دمای 288 درجه کلوین و فشار 20 بار، 5.47 بود. داده های آزمایشگاهی از ایزوترم لانگمویر-فرندلیچ پیروی می کنند. نتایج نشان داد که تبدیل اندازه ذره از میکرو متر به نانو متر، باعث می شود جذب دی اکسیدکربن حدود 28 درصد در دمای 288 درجه کلوین و فشار 20 بار افزایش یابد ( از 5.067 به 6.536 میلی مول بر گرم).



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