摘要:
The present invention relates to a catalyst used for producing dimethylether, a method of producing the same, and a method of producing dimethylether using the same. More particularly, the present invention relates to a catalyst used for producing dimethylether comprising a methanol synthesis catalyst produced by adding one or more promoters to a main catalyst comprised of a Cu—Zn—Al metal component and a dehydration catalyst formed by mixing Aluminum Phosphate (AlPO4) with gamma alumina, a method of producing the same, and a method of producing dimethylether using the same, wherein a ratio of the main catalyst to the promoter in the methanol synthesis catalyst is in a range of 99/1 to 95/5, and a mixing ratio of the methanol synthesis catalyst to the dehydration catalyst is in a range of 60/40 to 70/30.
摘要:
Disclosed herein is a gas separation membrane for a DEM production process, including: a porous support having a carbon dioxide permeability of more than 300 GPU (GPU=1×10−6 cm3/cm2·sec·cmHg) and an inner diameter of 100˜1000 μm; and a composite membrane provided on an inner or outer surface of the porous support and coated with a separating material having a permeation selectivity of carbon dioxide/hydrogen of 4 or more. The gas separation membrane is advantageous in that it can improve efficiency of the separation process by selectively separating and removing carbon dioxide from a gas mixture of carbon dioxide and hydrogen produced during a process of producing DME which is a next-generation clean fuel.
摘要翻译:本发明公开了一种用于DEM制备方法的气体分离膜,包括:二氧化碳渗透率大于300GPU(GPU = 1×10 -6 cm 3 / cm 2·sec·cmHg)和内径为100 〜1000μm; 以及复合膜,其设置在所述多孔载体的内表面或外表面上,并涂覆有二氧化碳/氢的渗透选择性为4以上的分离材料。 气体分离膜的优点在于,通过在生产作为下一代清洁燃料的DME的过程中从二氧化碳和氢气的气体混合物中选择性分离和除去二氧化碳,可以提高分离过程的效率。
摘要:
Disclosed herein is a process for the preparation of dimethylether from hydrocarbons, including tri-reforming a feedstock mixture comprised of hydrocarbons, carbon dioxide and water vapor in the presence of a tri-reforming catalyst, to prepare a syngas, which then undergoes gas-phase direct synthesis into dimethylether in one step in the presence of a hybrid catalyst. According to the process of this invention, three main processes among typical syngas preparation processes are simultaneously performed, and then, the syngas thus obtained is prepared into dimethylether through a direct reaction in one step, thereby decreasing the apparatus cost and operation cost. In addition, all of the carbon dioxide separated and recovered from the unreacted material and by-products may be reused as reaction material, thus decreasing the generation of carbon dioxide and reducing the material cost.