γ-Al_2O_3负载杂多酸催化合成二甲醚

Preparation of Dimethylether Via Methanol Condensation Catalyzed by Loaded Heteropoly Acid

用浸渍法制备了Ｈ４ＳｉＷ１２Ｏ４０－Ｔｉ（ＳＯ４）２－Ｌɑ２Ｏ３－γ－Ａｌ２Ｏ３（ＨＴＬＡ）复合催化剂，以吡啶作为化学探针分子，研究了ＨＴＬＡ及γ－Ａｌ２Ｏ３的表面酸性质，并将ＨＴＬＡ作为催化剂，用于甲醇缩合制二甲醚的模型反应。

A catalyst of H 4SiW 12 O 40 -Ti(SO 4) 2-Lɑ 2O 3-γ-Al 2O 3 prepared by the impregnation method was used for condensation of methanol to form dimethylether. The effects of reaction temperation, calcination temperature of the catalyst, Weight hourly space velocity and loading of heteropoly acid on catalytic activity and selectivity were studied. The stability and acidity of the catalyst were investigated as well.