Synthesis Of Methanol Reactor Flows To Transform Forced Periodic Operation Model Study

Methanol is one of the most essential chemical materials, and the initial oxygen-containing compound in the C₁-chemistry. Up to now, the process of methanol synthesis plays an important role in all chemical processes because of its importance in the C₁-Chemical Technology and Engineering and the widely application.In view of the situation that larger energy consumption, more serious poison of sulfur compound to the catalyst used, and too large production cost for domestic methanol production, the new technologies of methanol synthesis are needed, and the flow reversal mode of reactors can partly be used to solve just these problems. Thus the study of novel reactor for methanol synthesis operated under flow reversal mode is important to both academic research and industrial applications.Based on the demand for modeling the methanol synthesis reactor with flow reversal, an experiment set up, used for the study of adsorption, reaction performance and dynamic responses, was designed and structured. By means of the in-situ FTIR technique, TPD and TPSR techniques, we systematically investigated the adsorption features of CO, CO₂, H₂ and CH₃OH, and the reaction performances of CO/H₂ and CO₂/H₂ on the active surface. Starting from the above-mentioned observations, all possible intermediates were identified and the sequence of the elementary steps is then proposed. At last, the parameters of the transient kinetics involved are estimated by fitting the solutions of differential conservation equations of the experimental reactor with the transient response data.To meet the need of modeling of methanol synthesis reactor with flow reversal, a bench scale experiment unit was designed and mounted. Two set of instruments used for the analysis of transient composition of the tail gas and for probing the transient axial temperature profiles in the bed were developed. The effects of several major operation conditions, such as the feed composition, the gas flow rate and the duration of period on the operation performance of the reactor, were investigated systematically.The main results show that the gas flow rate is the major factor effecting on the propagation velocity of the thermal wave; the peak value of the temperature of thea...