Table 1 Elemental analysis of high volatile bituminous and semi-anthracite coals.

From: Towards valorizing natural coals in sodium-ion batteries: impact of coal rank on energy storage

Coal sample

Carbon

Hydrogen

Nitrogen

Oxygen

Sulfur

HVBC

86.49

2.38

0.89

3.53

3.03

SAC

79.24

1.97

0.85

7.49

0.91

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