Kinetics of Hydrogenolysis of Glycerol into 1,2-Propylene Glycol on a Copper Catalyst

Synthesis of 1,2‐Propylene Glycol in a Continuous Down‐Flow Fixed‐Bed Reactor With Cu/Al2O3Catalyst

“…Experimental data obtained in the temperature range 210–260 °C were described by Arrhenius equation (Figure 5). For comparison, Figure 5 also shows the values of the reaction rate constants calculated for the catalyst with a particle size of 0.1–0.16 mm in the kinetic mode of the process according to the equation obtained earlier [46] …”

“…In the kinetic mode, the activation energy is 125 (kJ mol À 1 ). [46] In the temperature range of 210-250 °C, the experimental data in Figure 5 can be described by the equation of a straight line with an error of less than 5 %. Therefore, in this temperature range the experimental data can be described by a simple kinetic equation (2), in which the effective diffusion coefficient is introduced into the reaction rate constant.…”

“…For comparison, Figure 5 also shows the values of the reaction rate constants calculated for the catalyst with a particle size of 0.1-0.16 mm in the kinetic mode of the process according to the equation obtained earlier. [46] Experimental curve showed in Figure 5 is typical for the transition mode between kinetic and internal diffusion controlled reaction rate. [47] Table 1.…”

“…Copper-containing catalysts have shown high stability in other works as well. For example, the Cu/Al 2 O 3 catalyst (obtained by the coprecipitation method) remained stable for 400 hours on stream at a temper- [46] (batch reactor) and experiments (continuous flow fixed-bed reactor). Experimental conditions: pressure 5.3 MPa, SLV 0.55 (m 3 m À 2 h À 1 ), molar ratio H 2 : GL 1.6.…”

“…For the study, there was selected the 60 %Cu/Al 2 O 3 catalyst obtained by coprecipitation, [45] for that we previously studied the kinetics under the batch conditions in the presence of the catalyst particles of 0.1-0.16 mm. [46]…”