High pressure plant for heterogeneous catalytic CO2 hydrogenation reactions in a continuous flow microreactor

Challenges in the Greener Production of Formates/Formic Acid, Methanol, and DME by Heterogeneously Catalyzed CO2Hydrogenation Processes

“…Related to the reaction conditions and the process energy costs, Tidona et al 260 investigated the energy requirements of high-pressure CO 2 -to-methanol process, assuming direct capture from air as CO 2 source and water electrolysis as H 2 source, and evaluated the effects of high-pressure operations on the process performance and energy requirement as a function of the reactor pressure. The study showed that the energy requirement lowers at higher pressures roughly up to 400 bar due to better performance given by the thermodynamic advantages, but then it goes slightly up at higher pressures for compression ( Figure 19 ).…”

Scale up study of capillary microreactors in solvent-free semihydrogenation of 2‐methyl‐3‐butyn‐2‐ol

“…However, considering that the vast majority of modern chemical processes utilise heterogeneous catalysts to replace stoichiometric reactions due to obvious economic and environmental advantages, the application of catalytic coatings in microreactors is disproportionately scarcely studied [17]. A few gas-phase heterogeneously catalysed reactions have been studied in various reactions such as Fisher-Tropsch synthesis, CO2 hydrogenation, water gas shift [18], preferential CO oxidation [19], and complete oxidation of organic compounds [20] demonstrating a 2-5 fold increase in reaction rates compared to conventional reactors [21][22][23][24].…”

Impact of Daily Startup–Shutdown Conditions on the Production of Solar Methanol over a Commercial Cu–ZnO–Al2O3 Catalyst

“…Nevertheless, this CO x gas can be attained from the same source as the solar syngas and can be recycled to minimize the impact on the overall efficiency of the process. Notably, a microchannel reactor could be applied that could be more adequately purged in the short time intervals imposed by the DSS schemes in combination with very large total pressures (up to 100 MPa) to ensure full one‐pass conversion . Besides, given that our results suggest that the DSS operation has a larger effect on catalyst deactivation than the steady‐state reaction conditions, a solar methanol synthesis process over a commercial Cu–ZnO–Al 2 O 3 catalyst therefore seems most feasible at locations with long daily insolation times and, thus, long reaction phases.…”

“…Remarkably,n ot only was catalyst deactivation over the entire 27-cycle test less significant with respectt ot he previous alternative DSS regimes,b ut it was also less pronounced than in the SS scenario.Inview of apotential solar methanol process,t he use of CO x as ap urging gas is more advantageous than the use of an inert gas, thoughitisn ot as facile as the wet DSS operation.Nevertheless,t his CO x gas can be attained from the same source as Energy Technol. 2016, 4, 565 -572 2 016Wiley-VCH Verlag GmbH &Co. KGaA,W einheim the solar syngas and can be recycled to minimize the impact on the overall efficiency of the process.Notably,amicrochannel reactor [21] could be applied that could be more adequately purged in the short time intervals imposed by the DSS schemesi nc ombinationw ith very large total pressures (up to 100 MPa) to ensure full one-pass conversion. [22] Besides, given that our results suggest that the DSS operation has al arger effect on catalyst deactivationt han the steady-state reaction conditions,asolarm ethanol synthesis process over ac ommercial Cu-ZnO-Al 2 O 3 catalyst therefore seems most feasible at locations with long daily insolation times and, thus,l ong reaction phases.…”