文献类型：期刊文献

英文题名：Study on concentrations of acids and alcohols emitted by pinus radiata during high-temperature drying

作者：Chu, Jiangyi[1] Jiang, Jinghui[1] Qi, Chusheng[2] Zhou, Yongdong[1]

第一作者：Chu, Jiangyi

通信作者：Jiang, Jinghui

机构：[1] Chinese Academy of Forestry, Research Institute of Wood Industry, Wan Shou Shan, Haidian, Beijing, China; [2] Beijing Forestry University Materials Science and Technology, Shuangqing Road, Haidian, Beijing, China

年份：2021

卷号：66

期号：3

起止页码：427-436

外文期刊名：Wood Research

收录：EI(收录号：20213110713420);Scopus(收录号：2-s2.0-85111598421)

语种：英文

外文关键词：Acetic acid - Drying - Formic acid - Moisture determination - Lumber - pH - Extraction - Moisture

摘要：The purpose of this paper is to investigate the influence of kiln temperature, relative humidity and wood moisture content on the content of acid and alcohol released in the drying process of high temperature kiln by studying the radiated pine sawn timber of 40mm thickness. The drying temperature was between 101°C and 115°C, the relative humidity in the drying kiln was reduced from 86.1% to 39.6%, the moisture content of the lumber was reduced from 106.16% to 11.98%, and gas extraction was executed nine times with an extraction speed of 1.0 L·min-1and a sampling time of 30 min. The concentrations of acids and alcohols were analyzed by HPLC. The results showed that the concentrations of formic acid, acetic acid, and methanol emitted in the kiln during drying were 215.6-748.2, 4148.8-16803.2, and 6381.9-15648.9 mg·m-3, respectively, and these concentrations were significantly higher than the relevant standards. The concentrations of the emitted formic acid and acetic acid were proportional to the drying temperature, the concentrations of the emitted formic acid and acetic acid were inversely proportional to the relative humidity in the kiln and the moisture content of the lumber. The concentration of the emitted methanol was independent of the drying temperature, relative humidity in the kiln, and moisture content of the lumber. It is therefore suggested that formic acid, acetic acid, and methanol be separately recovered during the high-temperature drying of Pinus radiata lumber. ? 2021 Statny Drevarsky Vyskumny Ustav. All rights reserved.