Table 2.
Effects of Heat Treatment on CB Characteristics.
| CB Sample | NSA (m2/g) |
STSA (m2/g) |
O (%) |
N (%) |
H (%) |
S (%) |
C (%) |
Lc (nm) |
d002 (nm) |
|---|---|---|---|---|---|---|---|---|---|
| N234, untreated | 126.4 | 120.3 | 2.21 | 0.145 | 0.337 | 0.924 | 93.7 | 1.19 | 0.365 |
| N234, 900 °C | 134.7 | 124.7 | 1.28 | 0.158 | 0.250 | 0.932 | 95.9 | 1.15 | 0.361 |
| N234, 1000 °C | 129.6 | 129.6 | 0.204 | 0.064 | 0.130 | 0.916 | 96.7 | 1.40 | 0.361 |
| N234, 1200 °C | 129.0 | 132.8 | 0.128 | 0.041 | 0.021 | 0.790 | 98.7 | 1.44 | 0.355 |
| N660, untreated | 36.4 | 35.2 | 0.576 | 0.082 | 0.339 | 1.84 | 95.9 | 1.78 | 0.352 |
| N660, 1000 °C | 36.4 | 37.3 | 0.110 | 0.056 | 0.141 | 1.78 | 96.8 | 1.59 | 0.355 |
Data from Monolith Technical Center in Lincoln, NE. Heat treatment conditions: CB annealed in inert atmosphere under positive-pressure Ar flow at indicated temperature for 18 h. Elemental analysis results from Leco ONH836 and Leco SC832 Elemental Analyzers. Crystallographic data (Lc and d002) from Rigaku Miniflex powder X-ray diffractometer utilizing k alpha radiation.