and the index of ethanol/raw ethylene consumption just slightly decreases because of the increase in ethanol conversion. The outlet dry gas composition at temperature 423 ◦ C and the residence time
2.1 s is presented in Table 4.
Long-term catalyst stability testing was carried out at the ther- mostat temperature 450 ◦ C and the residence time 4.1 s. The run time was about 72 h in total. Initial and final values of ethanol con- version and ethylene selectivity during stability tests practically have not change.
The differences between initial and final catalyst character- istics during stability tests practically have not changed. During long-term testing at conditions described above ethanol conver-