Production and Evaluation of Porous Photocatalyst Concrete Filter (deNOx PCF) for NOx Reduction

Figure 3

Changes in bubble height for different foaming agents with time by different generation conditions. (a) Foaming Agent A. (b) Foaming Agent B. (c) Foaming Agent C. (d) Foaming Agent A, B, and C 4%.

(a)

(b)

(c)

(d)