Roll press compaction of corn stover and perennial grasses toincrease bulk density

Nalladurai Kaliyan, R. Vance Morey, David R. Schmidt

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

The objective of this study was to investigate roll press compaction of coarsely ground corn stover and native perennial grasses to produce compacted products with a bulk density of at least 240kgm-3 for effective truck transport. A pilot-scale roll press compaction machine (520.7mm roll diameter and 127.0mm roll width) was used to compress corn stover and perennial grasses (moisture contents of 10% to 18% wet basis) ground in a tub-grinder with three round-hole screen opening sizes (25.4, 76.2, and 127.0mm). Bulk density of compacted materials (i.e., compacts) ranged from 263kgm-3 to 365kgm-3 for the roll compaction forces of 214-534kN. Durability (tumbling test) of compacts ranged from 61% to 92%. Specific energy consumption (excluding no-load machine energy) for the roll press compaction ranged from 19MJMg-1 to 339MJMg-1. The results from this study would be useful for developing a biomass supply logistics system involving coarse-grinding followed by roll press compaction of biomass bales.

Original languageEnglish (US)
Pages (from-to)322-330
Number of pages9
JournalBiomass and Bioenergy
Volume55
DOIs
StatePublished - Aug 2013

Bibliographical note

Funding Information:
This research was supported by North Central Sun Grant Biomass Feedstock Logistics Program , and Xcel Energy Renewable Development Fund . A previous version of this article was presented at the 2011 American Society of Agricultural and Biological Engineers (ASABE) Annual International Meeting in Louisville, Kentucky, 2011 Aug 7-10 as ASABE Paper No. 1110564. The authors would like to thank Mr. Troy Scharr (University of Minnesota) and Bepex's personnel (Bepex International LLC, Minneapolis, MN) for their assistance with this study.

Keywords

  • Biomass logistics
  • Corn stover
  • Densification
  • Perennial grasses
  • Roll press compaction
  • Tub-grinding

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