Popis: |
Novel mechanism of methanol synthesis on conventional Cu-containing catalysts is proposed and proved. It includes a conjugation of methanol synthesis and WGSR and involves the transformations of strongly adsorbed species. The mechanism is based on the data of tracer technique (use of 14 C, 18 O, D) and different variants of kinetic studies, including transformations of surface species in non-stationary systems, as well as various chemical treatments of catalyst surface followed by TPD. Individual steps of the mechanistic scheme have been proven in independent experiments. Theoretical kinetic model of the whole process (including methanol synthesis and WGSR) based on the mechanistic scheme is proposed and computer simulation is made. It describes all known experimental data (for the pressures from 0.1 up to 10 MPa). |