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Open AccessArticle

Effects of Brown Sugar Water Binder Added by Spraying Method as Solid Bridge on the Physical Characteristics of Biomass Pellets

1
Beijing Forestry University, Beijing 100083, China
2
Forestry New Technology Research Institute, Chinese Academy of Forestry, Beijing 100091, China
3
Beijing Forestry Machinery Research Institute of State Forestry and Grassland Administration, Beijing 100029, China
*
Authors to whom correspondence should be addressed.
Polymers 2020, 12(3), 674; https://doi.org/10.3390/polym12030674
Received: 11 February 2020 / Revised: 11 March 2020 / Accepted: 12 March 2020 / Published: 18 March 2020
(This article belongs to the Special Issue Degradation of Wood-Based Materials)
The binder can improve the physical characteristics of biomass pellets by forming solid bridges and increasing the adhesion of biomass materials. Taking pine sawdust as raw material and brown sugar water with different concentration as a binder, this study adopted spraying and stirring methods, respectively, and mixed brown sugar water with biomass in diverse proportions. The characteristic of pellets such as durability, relaxation ratio and compressive strength were studied by orthogonal design. Through range analysis, BP (Back Propagation) neural network factor significance analysis and mapping the relationship between physical properties and factors according to the importance of each factor, the effect of densification variables on the physical characteristics of biomass pellets was studied, and the outcome of adding brown sugar water binder to raw material by spraying method in improving the densification quality of biomass was explored. Results showed the brown sugar water binder added to pine sawdust by spraying method could mix the binder and biomass raw material more evenly compared with the stirring method. The relaxation ratio of pellets obtained by spraying method was reduced by 13.47%. The optimal densification conditions of pine sawdust were when the compaction pressure was 100 MPa, the mass ratio of brown sugar to water was 2:1, the proportion of brown sugar water to biomass material was 3%, and the adding method was spraying. View Full-Text
Keywords: biomass pellets; spraying method; densification; compressive strength; relaxation ratio; durability biomass pellets; spraying method; densification; compressive strength; relaxation ratio; durability
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MDPI and ACS Style

Zhang, K.; Song, S.; Chen, Z.; Zhou, J. Effects of Brown Sugar Water Binder Added by Spraying Method as Solid Bridge on the Physical Characteristics of Biomass Pellets. Polymers 2020, 12, 674.

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