| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7068693 | Bioresource Technology | 2018 | 37 Pages |
Abstract
This study investigated effects of various pretreatments on characteristics of compression molded wheat straw and molding energy consumption. And correlative mechanism was explored. Pretreatments included natural air drying, vacuum sealing, 4% ammonium hydroxideâ¯+â¯vacuum sealing. Hemicellulose and lignin contents and crystallinity decreased following pretreatments, while surface porosities increased. Cellulose and ash levels and lower heat value were not significantly affected (Pâ¯>â¯.05), while water resistance decreased and relax density and fall strength satisfied relevant standards. Ignition index and comprehensive combustibility index of samples treated with 4% ammonium hydroxideâ¯+â¯vacuum sealing were the greatest, and molding energy consumption was also the lowest. Optimal pretreatment time was 21â¯days. Mechanism analysis indicated that crystallinity affected water resistance, lignin affected combustion characteristics and hemicellulose affected molding energy consumption to the greatest extent. Overall, 4% ammonium hydroxideâ¯+â¯vacuum sealing pretreatment had the most beneficial effect on compression molding and resulted in the lowest energy consumption.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Process Chemistry and Technology
Authors
Xinyan Zhang, Wangqiang Peng, Lujia Han, Weihua Xiao, Xian Liu,