用二氧化碳和甲醇直接合成碳酸二甲酯的研究

采用表面反应改性法制备了ＭｏＯ３－ＳｉＯ２表面复合物，用等体积浸渍法制备了ＭｏＯ３－ＳｉＯ２担载的Ｃｕ－Ｎｉ双金属催化剂，用ＩＲ、ＴＰＤ、ＴＰＳＲ和微反技术研究了ＣＯ２和ＣＨ３ＯＨ在催化剂表面上的化学吸附与反应性能。结果表明，Ｃｕ－Ｎｉ／ＭｏＯ３－ＳｉＯ２催化剂对ＣＯ２和ＣＨ３ＯＨ反应具有良好的催化反应活性，ＣＯ２和ＣＨ３ＯＨ在催化剂表面上的反应产物主要为碳酸二甲酯（ＤＭＣ）、ＣＨ２Ｏ、ＣＯ和Ｈ２

STUDY ON Cu-Ni/MoO3-SiO2 CATALYST FOR THE DIRECT SYNTHESIS OF DIMETHYL CARBONATE FROM CARBON DIOXIDE AND METHANOL

The surface complex support of MoO 3 SiO 2 was prepared by the method of surface reaction modification. The MoO 3 SiO 2 supported Cu Ni bimetallic catalyst was prepared by isovolumic impregnation. Chemical adsorption and reaction performance of carbon dioxide and methanol on the catalyst were characterized by IR, TPD, TPSR and micro reactor techniques. The results showed that the said catalyst had high activity for dimethyl carbonate synthesis from carbon dioxide and gaseous methanol, and the reaction products were mainly dimethyl carbonate with a selectivity higher than 80%, CH 2O, carbon monoxide and water.