alexa Synthesis of Zinc-Organic Frameworks Nano Adsorbent and their Application for Methane Adsorption
ISSN: 2157-7048

Journal of Chemical Engineering & Process Technology
Open Access

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Research Article

Synthesis of Zinc-Organic Frameworks Nano Adsorbent and their Application for Methane Adsorption

Mahnaz Aghajanloo1, Ali Morad Rashidi2* and Mohamad Ali Moosavian1
1 Oil and Gas Processing Centre of Excellence, School of Chemical Engineering, College of Engineering, Tehran University, Tehran, Iran
2 Research Institute of Petroleum Industry, Nanotechnology Research Center, West Blvd., Azadi Sport Complex, Tehran, Iran
Corresponding Author : Ali Morad Rashidi
Research Institute of Petroleum Industry
Nanotechnology Research Center, West Blvd
Azadi Sport Complex, Tehran, Iran
Tel: +98-21-48252323
Fax: +98-21-48257676
E-mail: [email protected]
Received June 11, 2014; Accepted July 29, 2014; Published August 02, 2014
Citation: Aghajanloo M, Rashidi AM, Moosavian MA (2014) Synthesis of Zinc- Organic Frameworks Nano Adsorbent and their Application for Methane Adsorption. J Chem Eng Process Technol 5:203. doi:10.4172/2157-7048.1000203
Copyright: © 2014 Aghajanloo M, et al.. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Abstract

In the present work, MOF-5 consisting of Zn4O inorganic vertices was hydrothermally synthesized. Three-step activation treatment including preservation in initial solvent, solvent exchange and drying under evacuated condition was performed and it was found that activation is efficient by increasing the methane adsorption capacity of samples. The final product was characterized by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermal gravimetric analysis (TGA), scanning electron microscopy (SEM) and pore size distribution (PSD). The corresponding pore size of MOF-5/DEF (sample A) and MOF-5/DMF (sample B) which was determined by nitrogen adsorption at 77 K, were equal to 31.27 Šand 42.65 Ǻ and also BET surface area of samples were 2157 and 1532 m2/g, respectively. Methane adsorption equilibrium for both samples was measured in a volumetric adsorption unit and it was found that the adsorbent (A) and (B) in this work have methane adsorption capacity of 18.15 and 11.36 mmol/g at temperature of 298 K and pressure of 36 bar, respectively. Four different models (Langmuir, Unilan, Toth and Sips) were used to correlate the experimental equilibrium data. The root mean square error values demonstrated that the Toth and Sips equation provide better models for correlating adsorption isotherms.

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