Dimethyl ether (DME) is a versatile raw material and an interesting alternative fuel that can be produced by the catalytic direct hydrogenation of CO2. Recently, this process has attracted attention industry due to environmental benefits CO2 elimination from atmosphere its lower operating costs with respect classical, two-step synthesis DME syngas (CO + H2). However, kinetics thermodynamic limi...

using surface analysis, simultaneous effects of temperature (260-380ºc) and ethanol concentration (0-1%) on dimethyl ether (dme) selectivity, yields of hydrocarbon and dme, and methanol conversion were investigated in methanol dehydration reaction over γ-al2o3 catalyst. methanol conversion and yield of hydrocarbon/dme were found to be significantly affected by temperature and the temperature-et...

Embryonic X-ray amorphous semi-formed MFI-type zeolite units mixed with the Cu–Zn–Al catalyst have been used for direct synthesis of dimethyl ether (DME) from syngas. The hybrid embryonic (EZ) particle size 5 nm has demonstrated superior performance in terms activity, selectivity, and stability compared to crystalline ZSM-5 counterpart aluminosilicate material. FTIR pyridine adsorption uncovere...

The reaction of Na2MoO4 with 2,2'-oxydianiline (2-aminophenylether), (2-NH2C6H4)2O, LH4, in DME (DME = 1,2-dimethoxyethane) in the presence of Et3N and Me3SiCl afforded either the bis(imido) molybdenum(vi) complex {Mo(L)Cl2(DME)} (), where L = (2-NC6H4)2O, or the molybdenum(v) salt [Mo(L')Cl4][Et3NH] (), where L' = [(2-NH2C6H4)(2-NC6H4)O], depending on the work-up method employed. The same diam...

Due to its excellent conductivity, good thermal stability and large specific surface area, carbon nano-tubes (CNTs) were selected as support to prepare a Re-based catalyst for dimethyl ether (DME) direct oxidation to polyoxymethylene dimethyl ethers (DMMx). The catalyst performance was tested in a continuous flow type fixed-bed reactor. H3PW12O40 (PW12) was used to modify Re/CNTs to improve its...

Core-shell-type catalysts, which are synthesized by encapsulating the Cu-ZnO-Alumina type methanol synthesis catalyst (CZA) silicotungstic acid (STA)-incorporated mesoporous alumina, were prepared following a hydrothermal route and tested in DME from syngas CO2. Activity tests, performed pressure range of 30–50 bar, temperature 200–300 °C, with different feed compositions (CO2/CO/H2: 50/-/50, 4...

Using surface analysis, simultaneous effects of temperature (260-380ºC) and ethanol concentration (0-1%) on dimethyl ether (DME) selectivity, yields of hydrocarbon and DME, and methanol conversion were investigated in methanol dehydration reaction over γ-Al2O3 catalyst. Methanol conversion and yield of hydrocarbon/DME were found to be significantly affected by temperature and the temperature-et...

The production processes included catalytic dehydration of methanol in an adiabatic fixed-bed reactor and two columns product separations. In this study, the technological process for dimethyl ether (DME) synthesis is built on PRO/II platform based on the combined parameters of the reaction dynamic model for methanol dehydration reaction, the improved NRTL model of the liquid phase, the PR mode...

Diabetic retinopathy is the leading cause of visual impairment in the working age group mainly due to diabetic macular edema (DME). As the incidence of diabetes is increasing in human populations, the visual burden of DME is expected to expand. The standard treatment for DME has been macular laser photocoagulation for almost two decades but has shifted to intravitreal injection of anti-VEGF age...

• Structuration of the CZA catalyst by washcoating was successfully obtained Inorganic colloids are crucial for obtaining good adherence on monolith Nevertheless, inorganic affect to catalytic properties Acidity like Al 2 O 3 and SiO is able dehydrate methanol DME CZA_10%Al formulation coated monoliths showed excellent activity performances. The best slurry prepare a structured synthesis reacti...