Table 1 Chemical composition of the holistic catalyst on steel mesh analyzed by EDX and the acid density measured by chemical titration using NaOH

From: High performance catalytic distillation using CNTs-based holistic catalyst for production of high quality biodiesel

 

CNTs-SH

CNTs-SO3H

 

Element

Weight %

Atomic %

Weight %

Atomic %

H2SO4

C

90.80

95.1

63.3

72.0

---

O

3.20

2.5

28.9

24.6

 

S

6.00

2.4

7.8

3.4

 

Acid density (mmol g−1)

---

2.54 (1.98*)

20.4

  1. *The figures in the parenthesis show the acid density measured by chemical titration after 100 h reaction.
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