Table 1 Properties of biochar pellets

Iodine number

mg g^− 1

123

187

150

BET

m² g^− 1

1.6

2.4

2.0

Total pore volume

cm³ g^− 1

0.0025

0.0044

0.0016

Mean pore diameter

nm

6.3

7.5

3.3

pH_DI

7.21

6.11

8.10

pH_ZPC

7.10

6.10

7.58

Element

C

%

68.5

63.3

31.9

H

%

3.5

3.1

1.9

O

%

27.8

27.2

65.2

N

%

0.06

6.3

0.60

S

%

0.15

0.04

0.01

H/C

0.08

0.05

0.06

O/C

0.14

0.43

2.06