Methanol Dehydration to Dimethyl Ether over Silica Derived from Rice Husk as the Component-Based Catalysts

Nattaporn Chaba; Sutasinee Neramittagapong; Arthit Neramittagapong

doi:10.4028/www.scientific.net/AMR.931-932.17

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 931-932Methanol Dehydration to Dimethyl Ether over Silica...

Methanol Dehydration to Dimethyl Ether over Silica Derived from Rice Husk as the Component-Based Catalysts

Abstract:

Dimethyl Ether (DME) an alternative fuel was synthesized by methanol dehydration over the silica-based catalysts. Silica extracted from both rice husk (A) and rice-husk ash (B) was used as the precursors for preparing the catalysts. The SiO₂/Al₂O₃ and the SAPO catalysts prepared from that silica were analyzed using X-ray diffraction (XRD), N₂ adsorption (BET surface area), X-ray fluorescence (XRF), NH₃ temperature-programmed desorption (NH₃-TPD), and thermal gravimetric analysis (TGA). The effects of reaction temperature on the methanol selectivity and conversion to dimethyl ether were investigated. The methanol dehydration reactions were carried out in a packed-bed reactor at the reaction temperature of 250-350°C. DME was the major product and formed with selectivity of 57% over SAPO-B. An increasing of the reaction temperatures resulted in the enhancing of methanol conversion. The highest methanol conversion of 93% was achieved at 325°C. The method of silica extraction had an effect on the selectivity to DME due to the higher BET surface area.

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Periodical:

Advanced Materials Research (Volumes 931-932)

Pages:

17-21

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.931-932.17

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Online since:

May 2014

Authors:

Nattaporn Chaba, Sutasinee Neramittagapong*, Arthit Neramittagapong

Keywords:

DME, Methanol Dehydration, Renewable Energy, Silica-Alumina

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* - Corresponding Author

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