Study of VOCs release during drying of plantation-grown Pinus sylvestris and naturally grown Russian Pinus sylvestris

Journal of Wood Science

Official Journal of the Japan Wood Research Society

Table 2 Constituents and amount of VOCs released during each period of conventional drying (plantation Pinus sylvestris)

VOCs and MC	Concentration of VOCs (mg/m³ of exhaust gas)						Total (mg/m³ of wood)
VOCs and MC	0–4 h	4–8 h	8–12 h	12–20 h	20–24 h	24–28 h	Total (mg/m³ of wood)
Formaldehyde	0.74	0.54	1.00	0.37	0.72	0.84	2.92
Acetaldehyde	0.01	0.04	0.01	2.88	–	0.01	2.04
n-Propanal	1.14	21.03	7.85	6.49	0.32	0.02	25.59
n-Butyraldehyde	0.07	1.78	0.63	3.79	0.01	0.01	4.37
n-Hexanal	2.15	6.65	2.48	26.47	0.92	0.02	26.86
Acraldehyde	0.25	1.54	0.42	3.72	0.02	▲	4.14
Iso-valeraldehyde	0.02	0.02	0.01	0.07	0.01	▲	0.09
n-Valeraldehyde	1.22	6.48	3.22	28.74	0.14	0.02	27.65
Benzaldehyde	0.39	0.09	0.11	0.05	0.92	▲	1.09
α-Pinene	14.47	16.06	22.86	18.75	72.20	▲	100.24
Camphene	0.37	0.75	0.75	0.57	2.53	▲	3.46
Myrcene	0.46	0.07	0.09	0.03	1.08	–	1.20
β-Pinene	2.09	0.08	0.10	0.05	1.26	▲	2.48
α-Phellandrene	2.29	0.70	0.89	0.61	5.42	▲	6.88
Limonene	2.41	0.55	0.09	0.33	5.86	–	6.41
r-Oilene	0.07	0.02	0.02	0.01	0.15	–	0.18
1-Heptene	0.33	1.69	0.46	3.33	0.02	▲	4.05
n-Heptane	0.04	0.03	0.40	2.30	0.02	▲	1.94
2,4-Dimethyl hexane	0.32	1.79	0.86	7.86	0.03	▲	7.55
Propylbenzene	0.09	0.05	0.07	0.04	0.45	–	0.49
Average MC %	55.91	43.06	24.70	13.66	10.79	8.78

“–” indicates VOCs undetectable. “▲”indicates VOCs were detected, but less than 0.005 mg. This also applies to the following tables