Optimization Study in Biodiesel Production via Response Surface Methodology Using Dolomite as a Heterogeneous Catalyst

Figure 8

(a) FAMEs yield for the first test (f), for the second test (s), and for the third test (t). (b) Catalyst composition change due to the successive catalytic test. d = dolomite, a1 = after first using, a2 = after first reusing, and a3 = after second reusing.

(a)

(b)