Influence of drying temperature on NO2 sorption ability of cedar timber

Autor: Miyuki Nakagawa, Kenji Umemura, Shuichi Kawai, Kozo Kanayama
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Zdroj: Journal of Wood Science, Vol 66, Iss 1, Pp 1-9 (2020)
Druh dokumentu: article
ISSN: 1435-0211
1611-4663
DOI: 10.1186/s10086-020-01877-0
Popis: Abstract NO2 sorption ability of cedar (Cryptomeria japonica) timbers was evaluated using a new measuring system that was developed in our previous study. Four drying conditions were applied, namely natural drying and three kinds of kiln-drying at 45, 60, and 105 °C. Aeration experiments were conducted using discoid specimens which had a thickness in the longitudinal direction of 1.5 mm, and a diameter of 10 mm. The moisture content was conditioned to 0 or 9 ± 1.0% in each drying condition. As a result, the NO2 sorption ability declined as the drying temperature increased. Based on the analysis of extractives, it was shown that the extractives content had a high correlation with the contribution ratio of extractives in the NO2 sorption volume of the specimens that were dried below 60 °C. Therefore, it was elucidated that the specimen dried naturally has the greatest NO2 sorption ability. Furthermore, the result of the gas chromatography–mass spectrometry (GC/MS) indicated that abietadiene influenced the NO2 sorption ability. Also, the NO2 sorption volume was high especially at the initial stage, which is higher under the condition with moisture.
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