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. Author manuscript; available in PMC: 2016 Sep 1.
Published in final edited form as: Energy Fuels. 2015 Sep 11;29(10):150911132333008. doi: 10.1021/acs.energyfuels.5b01398

Table 2.

Maximum (plateau) Gas Concentration, Reaction Rate Constant (k), and Emission Rate (ER) for the Four Major VOCs Emitted from Hardwood Pellets Stored in Steel Drums for the Three Different Temperature Conditionsa

compounds temperature (°C) Ci,∞ (ppb) ki (day−1) ERTotal
methanol 6–8 not fitted 9.60 × 10−5 ± 1 × 10−2 9.1 × 10−5
22 20 ± 2 0.21 ± 0.09 4.5 × 10−5
30 50 ± 6 0.26 ± 0.09 6.5 × 10−5
pentane 6–8 197 ± 200 0.009 ± 0.009 4.1 × 10−4
22 36 ± 3 0.2 ± 0.1 1.5 × 10−4
30 105 ± 11 0.20 ± 0.05 2.7 × 10−4
pentanal 6–8 ND ND ND
22 7.1 ± 0.5 0.18 ± 0.06 8.7 × 10−5
30 12 ± 2 0.3 ± 0.1 9.4 × 10−5
hexanal 6–8 1.8 ± 03 0.08 ± 0.02 5.8 × 10−5
22 26 ± 2 0.12 ± 0.3 1.7 × 10−4
30 49 ± 8 0.3 ± 0.1 2.1 × 10−4
a

ER-refers to emission rate at mg/kg-day; ND-refers to not detected.