RESEARCH ARTICLE

Effect of the degree of template removal from mesoporous silicate materials on their adsorption of heavy oil from aqueous solution

  • Farouq TWAIQ , 1 ,
  • M.S. NASSER 2 ,
  • Sagheer A. ONAIZI 3,4
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  • 1. Faculty of Engineering, Computing and Science, Swinburne University of Technology, Kuching 93350, Malaysia
  • 2. Gas Processing Center, College of Engineering, Qatar University, Doha, P. O. Box 2713, Qatar
  • 3. School of Chemical Engineering and Advanced Materials, Newcastle University, Singapore 599489, Singapore
  • 4. School of Chemical Engineering and Advanced Materials, Newcastle University, Newcastle upon Tyne, NE1 7RU, UK

Received date: 04 Sep 2014

Accepted date: 02 Nov 2014

Published date: 14 Jan 2015

Copyright

2014 Higher Education Press and Springer-Verlag Berlin Heidelberg

Abstract

The key aim of this study is to evaluate the adsorption of heavy oil from aqueous solutions with different oil contents over mesoporous silicate materials having different surfactant template contents. The mesoporous silicate materials have been synthesized from tetraethylorthosilicate as a silica precursor and cetyltrimethylammonium bromide as a template using the sol-gel technique. Four samples were prepared by (1) totally removing the template using the calcination process, (2) partially removing the template via ethanol extraction, (3) partially removing the template via water extraction, and (4) keeping the template as synthesized, respectively. These four samples have been characterized using X-ray diffraction, nitrogen adsorption, thermal gravimetric analysis and Fourier transformed infrared. The effect of the degree of template removal of these mesoporous materials for the oil removal has been investigated. The oil removal is inversely proportional to the surfactant content in the mesoporous material, being highest for the calcined sample but lowest for the as-synthesized sample. The kinetic of oil adsorption over the calcined material has been also studied and the data obtained fit well a second-order model.

Cite this article

Farouq TWAIQ , M.S. NASSER , Sagheer A. ONAIZI . Effect of the degree of template removal from mesoporous silicate materials on their adsorption of heavy oil from aqueous solution[J]. Frontiers of Chemical Science and Engineering, 2014 , 8(4) : 488 -497 . DOI: 10.1007/s11705-014-1459-1

Acknowledgment

The financial support by The Research Council (TRC), Sultanate of Oman under grant (Project: ORG/EI/10/005) is gratefully acknowledged. The adsorbent characterizations were performed at the CombiCat Research Centre, University Malaya, Malaysia and Daris Research Centre, Nizwa University, Sultanate of Oman.
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