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Advances in Materials Science and Engineering
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Advances in Materials Science and Engineering
/
2018
/
Article
/
Fig 5
/
Research Article
Extruded Catalysts with Magnetic Properties for Biodiesel Production
Figure 5
Micrographs (SEM) attained at 250× of the magnetic catalysts: (a) K
2
CO
3
/
γ
-Al
2
O
3
/(0.3)Fe
3
O
4
; (b) K
2
CO
3
/
γ
-Al
2
O
3
/sepiolite/(0.3)Fe
3
O
4
.
(a)
(b)
