Kinetic modeling of methanol synthesis over commercial catalysts based on three-site adsorption

CO2 Utilization Process Simulation for Enhancing Production of Dimethyl Ether (DME)

“…Figure 7 shows the effect of temperature of the methanol synthesis and the dual methanol-DME synthesis reactors on CO 2 conversion at reactor pressures of 40 bar at various unreacted gas recycle rates. e conversion of CO 2 in the methanol synthesis reactor involves the reaction of methanol formation (see (2)) and the reverse water gas shift reaction (see (4)) [31,32]. As with methanol production in the indirect process, CO 2 conversion increases from 195°C to 213°C due to the increased reaction rate [48], reaching a maximum value of 0.11 at a temperature of 213°C.…”

“…In order to have higher yield of methanol as the reaction is exothermic, the temperature has to be reduced prior to entering the next bed or stage so that the reaction can keep continuing to gain its equilibrium. e more the stages of the packed bed reactor are, the more the H 2 is consumed in the reactor International Journal of Chemical Engineering [31,32], thus reducing the remaining H 2 which will be flared/purged at the end of process. Currently, the scope of this study is still utilizing a single-stage packed bed reactor configuration in the process simulation where in future we plan to study the multistage reactor which will further reduce the flared H 2 using a more capital cost investment of multistage packed bed reactor.…”

“…e DME can be produced through dehydration of methanol over an acidic catalyst, while methanol can be produced by the hydrogenation of CO or CO 2 over a Cu-based catalyst as shown in Reactions (1), (2), and (3) [28][29][30]. Reaction (4) is a reverse water gas shift reaction [31,32]. e direct synthesis of DME from CO 2 has an advantage over two-step synthesis by further conversion of the methanol formed in situ to DME, so that overequilibrium yield can be achieved [33].…”

Gas phase methanol synthesis with Raman spectroscopy for gas composition monitoring

“…Flame ionization detector (FID) is usually applied for methanol concentration determination, while thermal conductivity detector (TCD) is used for analysis of other gaseous components. [7][8][9][10][11][12][13][14][15][16] However, although gas chromatography is a versatile and accurate analytical method, its application for continuous gas composition monitoring might be ineffective due to signicant temporal resolution limitations. 17 An additional issue of this method is the possible ambiguity in qualitative determination of unknown compounds within a complex mixture, which oen necessitates additional conrmatory identication.…”

Conversion of Carbon Monoxide into Methanol on Alumina-Supported Cobalt Catalyst: Role of the Support and Reaction Mechanism—A Theoretical Study

“…In recent years oxide-supported metal catalysts have been extensively studied for CO hydrogenation to methanol such as modified catalysts of the Fischer-Tropsch process or Cu-based catalysts [7][8][9][10][11][12], Mo-based catalysts [13][14][15][16], and cobalt nanoparticles [17][18][19][20]. However, the methanol selectivity and catalytic stability remain rather poor.…”