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전기원,( Venkataraman Vishwanathan ),노현석,김재우 한국화학공학회 2007 화학공학의이론과응용 Vol.10 No.1
Dehydration of methanol to dimethylether (DME) is an acid catalysed reaction of a commercialimportance. Several solid acid catalysts have been studied (a) to minimize the formation of hydrocarbons during reaction; and (b) to have higher resistance against water when crude methanol containing water (~ 20 mol %) is used as a main feedstock. In our present investigation, a series of TiO2-ZrO2 binary oxides with molar ratios of TiO2 to ZrO2,has been synthesized, characterized and tested for the title reaction in a fixed-bed reactor under normal atmospheric pressure. The objective of the presentation is to bring out the novelty of this new solid acid system with respect to catalytic activity, selectivity for DME and resistance against water during dehydration reaction. Based on our results, a mechanism is proposed as a possible reaction pathway for DME synthesis.
Catalytic Dehydration of CH₃OH to Dimethyl Ether over Alumina Synthesized from Aluminum Dross
Kim, Jae-Woo,Vishwanathan, Venkataraman,Oh, Eun-Ohk,Jun, Ki-Won,Kim, Jeong Yeon,Kim, Young-Ho,Yoo, Seung-Joon 한국공업화학회 2004 Journal of Industrial and Engineering Chemistry Vol.10 No.6
Activated aluminas have been synthesized via two different intermediate precursors, viz., Al(OH) and Al(OC₃H_7)₃, from aluminum dross as the starting material and their ₃catalytic behaviors have been investigated as solid acids in the dehydration of methanol to dimethyl ether. Only the synthesis method using aluminum isopropoxide gave efficient active catalysts having 100% selectivity for DME and high stability. Based on these results, we infer that the high activity of the Al₂O₃ catalyst derived from alkoxide is due to the presence of only the γ-phase as well as a negligible Na content, in contrast to the co-existence of χ- phase Al₂O₃ and relatively high Na-content in the Al₂O₃ catalyst derived from hydroxide.