Preparation of Zeolite MCM-22 Using the Rice Husk Ash as Silica Source

Everton Ranny Ferreira dos Santos; Aécio Barbosa Sousa; Romulo Charles Nascimento Leite; Hervé Michel Laborde; Romualdo Rodrigues Menezes; Meiry Glaúcia Freire Rodrigues

doi:10.4028/www.scientific.net/MSF.805.646

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HomeMaterials Science ForumMaterials Science Forum Vol. 805Preparation of Zeolite MCM-22 Using the Rice Husk...

Preparation of Zeolite MCM-22 Using the Rice Husk Ash as Silica Source

Abstract:

Brazil is a great producer of rice generating large amounts of husks after rice processing. These hulls contain high percentage of SiO₂, and a great potential as raw material for the development of silica based materials, as zeolites. Thus, this work aims to use the silica of rice hulls as an alternative raw material for the production of zeolite MCM-22. This material was characterized through X-ray diffraction, X-ray spectrophotometry and physical adsorption of N₂ (BET). The diffraction pattern of precursor MCM-22 presented typical peaks of topology MWW. Calcined sample did not presented peaks related with the organic material used in of the zeolite MCM-22, indicating that the thermal treatment was efficient for organic removal. It was confirmed, through the EDX, that the synthesized materials present high amount of SiO₂ and low quantity of Al₂O₃. The BET isotherms indicated that the materials presented structures with microporous, concluding that the alternative silica was promisingly for the development of zeolites.

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Periodical:

Materials Science Forum (Volume 805)

Pages:

646-650

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.805.646

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Online since:

September 2014

Authors:

Everton Ranny Ferreira dos Santos*, Aécio Barbosa Sousa, Romulo Charles Nascimento Leite, Hervé Michel Laborde, Romualdo Rodrigues Menezes, Meiry Glaúcia Freire Rodrigues

Keywords:

Rice Husk, Rice Husk Ash, Silica Source, Zeolite MCM-22

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