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Effect of hydrothermal carbonization on storage process of woody pellets: Pellets’ properties and aldehydes/ketones emission

Author:
Li, Hui, Wang, Siyuan, Huang, Zhongliang, Yuan, Xingzhong, Wang, Ziliang, He, Rao, Xi, Yanni, Zhang, Xuan, Tan, Mengjiao, Huang, Jing, Mo, Dan, Li, Changzhu
Source:
Bioresource technology 2018 v.260 pp. 115-123
ISSN:
0960-8524
Subject:
aldehydes, energy, fatty acid composition, hardness, hydrochars, hydrothermal carbonization, ketones, pelleting, pellets, temperature, unsaturated fatty acids, water content
Abstract:
Effect of hydrothermal carbonization (HTC) on the hydrochar pelletization and the aldehydes/ketones emission from pellets during storage was investigated. Pellets made from the hydrochar were stored in sealed apparatuses for sampling. The energy consumption during pelletization and the pellets’ properties before/after storage, including dimension, density, moisture content, hardness, aldehyde/ketones emission amount/rate and unsaturated fatty acid amount, were analyzed. Compared with untreated-sawdust-pellets, the hydrochar-pellets required more energy consumption for pelletization, and achieved the improved qualities, resulting in the higher stability degree during storage. The species and amount of unsaturated fatty acids in the hydrochar-pellets were higher than those in the untreated-sawdust-pellets. The unsaturated fatty acids content in the hydrochar-pellets was decreased with increasing HTC temperature. Higher aldehydes/ketones emission amount and rates with a longer emission period were found for the hydrochar-pellets, associated with variations of structure and unsaturated fatty acid composition in pellets.
Agid:
5937329