A new Langmuir–Hinshelwood mechanism for the methanol to dimethylether dehydration reaction over clinoptilolite-zeolite catalyst

Reaction kinetics determination and neural networks modeling of methanol dehydration over nano γ-Al2O3 catalyst

“…Table 7 summarizes the results for all three equations. From these results it may be seen that; first of all, errors at 473 and 573 K were reasonable; second, errors at 523 K indicated that Ptaszek equation did not generalize while Bercic equation was more generalizable than Song equation over the studied experimental rates; third, the activation energy for methanol dehydration was determined to be in the range of 10-128 kJ/mol which is in good agreement with the activation energies reported in literature [21][22][23][24][25]27,28]; finally, the negative values of H M and H W prove faster desorption of polar Based upon the literature, two possible mechanisms exist for methanol dehydration reaction. In the first mechanism, the methanol molecule is adsorbed on two sites with dissociation.…”

“…Although using a fixed bed reactor for DME synthesis is the most convenient and frequent way [2,10,[19][20][21][22][23], but due to different considerations a number of researchers have used other reactors, including slurry ones [24,25], fluidized bed [26] and tubular flow [27,28]. Methanol dehydration is an exothermic and reversible reaction for which thermodynamics limitations exist at high temperatures.…”

Kinetic Investigation of η-Al2O3 Catalyst for Dimethyl Ether Production

“…Moreover, alumina can be used as a catalyst support in different oxidation reactions [7,8]. Therefore, optimizing Al 2 O 3 as a catalyst or a support for such processes remains a topic of great importance [9]. Extensive studies were performed on γ-Al 2 O 3 for MTD reaction.…”

Fixed-bed reactor modeling for methanol to dimethyl ether (DME) reaction over γ-Alumina using a new practical reaction rate model

“…Previous experiments showed that within the particle size of 0.17 mm, the intra-particle resistances are negligible [15,29]. In our experiments, powder catalyst has been used and when the catalyst particle size decreases, effectiveness factor tends to 100% and can be neglected [30].…”