An Experimental Study of the Formation of Talc through CaMg(CO₃)₂–SiO₂–H₂O Interaction at 100–200°C and Vapor-Saturation Pressures

Figure 8

SEM images of the inner surface of the silica tube. (a) Smooth inner surface before the reaction; (b) magnification of the square area shown in (a); (c) dissolution pits on the inner surface after heating at 200°C for ~60 days; (d) magnification of (c); severe erosion of the silica on the inner surface of FSCCs containing (e) 1.0 m Na₂SO₄ and (f) 1.0 m Li₂SO₄ after heating at 350°C for 1 h.

(a)

(b)

(c)

(d)

(e)

(f)