Dimethyl ether synthesis over novel mesoporous catalysts

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2008

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Tokay, Kenan Cem

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Due to overconsumption, fossil reserves are rapidly being depleted and various sources predict that they will not last until the end of 21st century. Moreover, the increase in the rate of global warming and the polluting matter emitted by the vehicles consuming fossil fuels has increased the search for renewable and clean energy sources. Alcohols and ethers, which contain fewer pollutants and have better burning properties, are commonly thought among clean fuel alternatives. Among the potential clean energy sources, dimethyl-ether is already in use in the automotive industries of many countries such as China and Japan, due to its low NOx and CO2 emissions, high cetane rating and efficient combustion characteristics, especially in diesel engines. In this work, dimethyl-ether synthesis is achieved using methanol dehydration reaction over solid acid catalysts. For this purpose, three different mesoporous MCM-41 type aluminum silicates have been synthesized with direct hydrothermal synthesis method and aluminum is added to the synthesized SBA-15 catalyst using impregnation method. Apart from the catalysts synthesized, different commercial catalysts such as aluminum oxide in different forms (α and γ), Nafion NR-50 and Nafion SAC-13 have also been tested in this reaction.

Subject Keywords

Chemical engineering., Chemical reactions

URI

http://etd.lib.metu.edu.tr/upload/3/12609817/index.pdf
https://hdl.handle.net/11511/17759

Collections

Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

K. C. Tokay, “Dimethyl ether synthesis over novel mesoporous catalysts,” M.S. - Master of Science, Middle East Technical University, 2008.