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

Hui Li; Siyuan Wang; Zhongliang Huang; Xingzhong Yuan; Ziliang Wang; Rao He; Yanni Xi; Xuan Zhang; Mengjiao Tan; Jing Huang; Dan Mo; Changzhu Li

doi:10.1016/j.biortech.2018.03.095

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

Bioresour Technol. 2018 Jul:260:115-123. doi: 10.1016/j.biortech.2018.03.095. Epub 2018 Mar 29.

Authors

Hui Li¹, Siyuan Wang², Zhongliang Huang³, Xingzhong Yuan⁴, Ziliang Wang⁵, Rao He², Yanni Xi², Xuan Zhang³, Mengjiao Tan⁶, Jing Huang³, Dan Mo⁴, Changzhu Li³

Affiliations

¹ Institute of Biological and Environmental Engineering, Hunan Academy of Forestry, Changsha 410004, PR China. Electronic address: lihuiluoyang@163.com.
² Institute of Biological and Environmental Engineering, Hunan Academy of Forestry, Changsha 410004, PR China; College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China.
³ Institute of Biological and Environmental Engineering, Hunan Academy of Forestry, Changsha 410004, PR China.
⁴ College of Environmental Science and Engineering, Hunan University, Changsha 410082, PR China.
⁵ Department of Chemical and Biological Engineering, University of British Columbia, Vancouver V6T 1Z3, Canada.
⁶ Institute of Biological and Environmental Engineering, Hunan Academy of Forestry, Changsha 410004, PR China; College of Resource and Environment, Hunan Agricultural University, Changsha 410128, PR China.

PMID: 29625282
DOI: 10.1016/j.biortech.2018.03.095

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.

Keywords: Biomass; Hardness; Hydrochar; Storage; Woody pellets.

MeSH terms

Aldehydes*
Carbon
Environment
Ketones*
Wood

Substances

Aldehydes
Ketones
Carbon