Lignin Use in Enhancing the Properties of Willow Pellets

Author:

Elniski Autumn1ORCID,Dongre Prajakta23,Bujanovic Biljana M.13

Affiliation:

1. Department of Chemical Engineering, State University of New York College of Environmental Science and Forestry, One Forestry Drive, Syracuse, NY 13210, USA

2. Department of Biological Systems Engineering, University of Wisconsin-Madison, 460 Henry Mall, Madison, WI 53706, USA

3. USDA FS-Forest Products Laboratory, One Gifford Pinchot Drive, Madison, WI 53726, USA

Abstract

Shrub willow (Salix spp.) is an emerging lignocellulosic biomass utilized in fuel pellets as an energy source. However, improvements are needed to increase the efficacy of pellets in areas such as the energy content, durability, and hazardous carbon monoxide emissions. This study examined the effect of utilizing lignin as an additive on willow pellet properties. Two types of lignin were used in individual treatments: lignin recovered from the hot water extraction of willow (RecL) and commercial softwood kraft lignin (ComL). A statistical analysis of the ash content, energy content, bulk density, durability, pellet length, moisture absorption, and carbon monoxide emissions for the pellets with and without the addition of RecL or ComL lignin was conducted. The observed significant reduction in carbon monoxide emissions from RecL pellets was an important effect of the lignin addition. There were also significant increases in the energy content, bulk density, and durability of lignin-added pellets. While the production of carbon monoxide via pellets continues to be explored, lignin can be utilized as an additive to reduce carbon monoxide emissions and simultaneously improve other pellet properties.

Funder

New York State Energy Research and Development Authority (NYSERDA) Contract Agreement

USDA-FS-Forest Products Laboratory, Madison, WI, USA

Publisher

MDPI AG

Subject

Forestry

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