Process Simulation and Cost Analysis for Removing Inorganics from Wood Chips Using Combined Mechanical and Chemical Preprocessing

Hu, Hongqiang; Westover, Tyler L.; Cherry, Robert; Aston, John E.; Lacey, Jeffrey A.; Thompson, David N.

doi:10.1007/s12155-016-9794-3

Title: Process Simulation and Cost Analysis for Removing Inorganics from Wood Chips Using Combined Mechanical and Chemical Preprocessing

Journal Article · Mon Oct 03 00:00:00 EDT 2016 · BioEnergy Research

DOI:https://doi.org/10.1007/s12155-016-9794-3· OSTI ID:1328491

Hu, Hongqiang; Westover, Tyler L.; Cherry, Robert; Aston, John E.; Lacey, Jeffrey A.; Thompson, David N.

Inorganic species (ash) in biomass feedstocks negatively impact thermochemical and biochemical energy conversion processes. In this work, a process simulation model is developed to model the reduction in ash content of loblolly logging residues using a combination of air classification and dilute-acid leaching. Various scenarios are considered, and it is found that costs associated with discarding high-ash material from air classification are substantial. The costs of material loss can be reduced by chemical leaching the high-ash fraction obtained from air classification. The optimal leaching condition is found to be approximately 0.1 wt% sulfuric acid at 24°C. In example scenarios, total process costs in the range of $10-12/dry tonnes of product are projected that result in a removal of 11, 66, 53 and 86% of organics, total ash (inorganics), alkaline earth metals and phosphorus (AAEMS+P), and silicon, respectively. Here, sensitivity analyses indicate that costs associated with loss of organic material during processing (yield losses), brine disposal, and labor have the greatest potential to impact the total processing cost.

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Research Organization:: Idaho National Lab. (INL), Idaho Falls, ID (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: AC07-05ID14517

OSTI ID:: 1328491

Alternate ID(s):: OSTI ID: 1357766

Report Number(s):: INL/JOU-16-39865; PII: 9794

Journal Information:: BioEnergy Research, Journal Name: BioEnergy Research Vol. 10 Journal Issue: 1; ISSN 1939-1234

Publisher:: Springer Science + Business MediaCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 11 works

Citation information provided by
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