The CO2 conversion is 77.3%, which means
the formation of CO2 from CO by Water–Gas-Shift (WGS) reaction.
The methanol selectivity decreases to 51.4% from the highest value
of 96.8% on the bare CuZnAl catalyst, along with the increase of
DME selectivity reaching up to 46.6%. Therefore, this mixture catalyst CuZnAl/SAPO11-M shows the ability on DME direct synthesis
from syngas, but the selectivity of DME is not so satisfied