IJE TRANSACTIONS C: Aspects Vol. 28, No. 6 (June 2015) 848-854    Article in Press

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M. Anbia and S. Salehi
( Received: December 25, 2014 – Accepted: May 02, 2015 )

Abstract    Carbon dioxide (CO2) adsorption on unfunctionalized and amino-functionalized SBA-3 materials are investigated and compared in this study. The synthesized materials are characterized by various techniques such as X-ray diffraction (XRD), Brunauer-Emmet-Teller (BET) method, Fourier transform infrared (FT-IR) and Scanning electron microscopy (SEM).The isotherms of these materials have been measured using volumetric method at 298 K up to 5 bar. The adsorption capacity of CO2 by mesoporous silica was enhanced through functionalization with amine groups. It is observed that the pentaethylene hexamine functionalized SBA-3 (SBA-3/PEHA) shows a higher adsorption capacity towards CO2 compared to other adsorbents.


Keywords    CO2 adsorption; Mesoporous silica; SBA-3; Amine functionalization; Pentaethylenehexamine (PEHA).


چکیده    جاذب های SBA-3عامل دار نشده و عامل دار شده با گروههای آمینی، برای جذب CO2سنتز گردید. ويژگي­هاي ساختاري و فيزيکي جاذب های سنتز شده با روش هاي پراش اشعه ايکس (XRD)، آناليز جذب و واجذب نيتروژن، اسپکتروسکوپي مادون قرمز تبديل فوريه (FTIR) و ميکروسکوپي الکتروني روبشي (SEM) شناسايي شده است. مقدار گاز ذخيره شده در دماي محيط (K298 (و فشار گاز تا bar5 به روش حجم سنجي اندازه­گيري شده است. از طریق عامل دار کردن مزومتخلخل سیلیکاتی با گروههای آمینی، ظرفیت جذب CO2 افزایش می یابد. جاذب SBA-3/PEHA بیشترین میزان ظرفیت جذب CO2 را نسبت به دیگر جاذب ها از خود نشان می دهد.



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