To investigate the impact of the outlet temperature on the yield
of green tea powder and on the stability of the catechins, the inlet
temperature was fixed at 170±1 °C, reported as optimal by Tang et
al. [10], the aspiration rate was set at 100% and the compressed air
flow was fixed at 301 L/h. The pump rate was then adjusted between
4 and 24% to obtain outlet temperatures ranging from 70 to 115 °C.