Official Journal of the Japan Wood Research Society
Table 5 Constituents and amount of VOCs released during each period of high-temperature drying (Russian Pinus sylvestris)
VOCs and MC | Concentration of VOCs (mg/m3 of exhaust gas) | Total (mg/m3 of wood) | ||||
|---|---|---|---|---|---|---|
0–3 h | 3–6 h | 6–9 h | 9–12 h | 12–15 h | ||
Formaldehyde | 0.60 | 0.52 | 0.40 | 0.77 | 0.71 | 2.08 |
n-Propanal | 0.99 | 0.26 | 0.23 | 5.23 | 0.86 | 5.26 |
n-Hexanal | 1.88 | 8.61 | 3.11 | 49.88 | 3.67 | 46.64 |
Acraldehyde | 1.94 | 3.74 | 1.28 | 5.05 | 4.07 | 11.17 |
Iso-valeraldehyde | 1.26 | 1.81 | 0.45 | 10.02 | 2.23 | 10.96 |
n-Valeraldehyde | 2.00 | 4.92 | 0.60 | 51.89 | 1.89 | 42.57 |
Benzaldehyde | 6.98 | 7.37 | 3.14 | 4.59 | 2.79 | 17.28 |
α-Pinene | – | 32.69 | 12.67 | 11.66 | 108.58 | 115.00 |
Camphene | 0.33 | 1.38 | 1.42 | – | 2.59 | 3.97 |
Myrcene | 1.33 | 1.93 | 0.70 | 1.40 | 0.61 | 4.14 |
β-Pinene | 0.62 | 11.31 | 17.66 | 6.75 | 9.00 | 31.49 |
α-Phellandrene | 1.27 | 1.25 | 0.53 | – | 0.81 | 2.67 |
Limonene | 24.33 | 28.32 | 12.31 | 17.29 | 3.61 | 59.63 |
1-Heptene | 1.37 | 2.70 | 0.80 | 10.52 | 2.57 | 12.47 |
n-Heptane | 1.77 | 2.73 | 0.74 | 3.33 | 3.25 | 8.211 |
2,4-Dimethyl hexane | 0.70 | 1.25 | – | 14.50 | 0.56 | 11.81 |
Average MC % | 51.45 | 32.5 | 20.36 | 14.06 | 9.64 | |