Kinetic laws of dimethyl ether synthesis reaction

Abstract

The work consists of a detailed study of the influence of pressure, temperature, volume velocity and the molar ratio of H2/CO on CO conversion and DME output. CO conversion and DME synthesis in the presence of a CuO·ZnO·Al2O3·ZrO2·CaO/bentonite: γ-Al2O3 catalyst was studied in terms of their layer-by-layer loading. It was shown that the method of loading catalysts in the ratio of 2:1:2 is the best option. Further studies of the catalytic activity of the samples were carried out using a 2:1:2 loading method. Operating conditions T=290 °C, P=2 MPa, H2/CO=2.5, volume velocity 1000 h-1, conversion of CO in a single pass through the catalyst bed DME output “Crystal 5000” gas chromatograph, TriStar II (3020) was determined using an automatic gas adsorption analyzer model BJH (Barett-Joyner-Halenda). The phase composition of the catalyst samples was studied by X-ray phase analysis (X-ray diffraction - XRD) using a Shimadzu XRD-6000 diffractometer. The surface morphology of the samples was studied by scanning electron microscope based on VEGA IILMU electron microscope and INCA ENERGY 350 energy dispersive microanalysis.

Keywords

• synthesis gas
• methanol
• dimethyl ether
• catalyst
• conversion
• pressure
• temperature
• volume velocity