The present PPWS provides a large specific surface area to increase the contact between liquid film and gas pollutants.
The gap between the plates can be adjusted easily to control the gas retention time and the gas flow rate can be increased further by increasing the size and the number of the MPPM.
It is expected that the present PPWS can be scaled up as an efficient control device with a very low pressure drop for the treatment of low-concentration soluble acid and basic gases. In the future, the removal efficiency of the PPWS for basic gas and soluble VOCs is worth further investigation.
In addition, the validation of the effect of acid gas temperature on the removal efficiency at room temperature
will be also explored. Further study on the long-term field test for both high and low inlet concentrations is also necessary.