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.