Ⅰ.C6H6 (g) +CH3OH (g) C7 H8 (g) +H2O (g)
Ⅱ.C7H8(g) +CH3OH (g) C8 H10 (g) +H2O (g)
Ⅲ.C8H10(g)+CH3OH(g) C9H12(g)+H2O(g)