Comparative Study of the Structure of Hydroproducts Derived from Loblolly Pine and Straw Grass

Wu, Qiong; Huang, Lang; Yu, Shitao; Liu, Shiwei; Xie, Congxia; Ragauskas, Arthur J.

doi:10.1021/acssuschemeng.7b01005

Title: Comparative Study of the Structure of Hydroproducts Derived from Loblolly Pine and Straw Grass

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Abstract

We investigated the structural characteristics of products derived from the hydrothermal carbonization (HTC) of loblolly pine (LP) and straw grass (SG) via solid-state cross-polarization/magic angle spinning nuclear magnetic resonance (CP/MAS ¹³C NMR), heteronuclear single-quantum correlation nuclear magnetic resonance (HSQC-NMR), and solution ¹³C NMR and ³¹P NMR techniques. Our results revealed that after HTC, hydrochars from both LP and SG mainly consisted of a combination of lignin, furfural, and condensed polyaromatic structures with a high level of fixed carbon content and higher heating value (HHV). Hydrochar from LP exhibited a higher aryl to furan ratio, and those from SG contained more aliphatic functional groups. Solution ¹³C NMR and HSQC revealed that both liquid chemicals were condensed polyphenolic structures with aliphatic groups that exist mainly in the form of side chains. Although the LP products exhibited a higher proportion of aromatic structures, the types of polyphenol and aliphatic C–H were more diverse in the SG products. Results also indicated that reactions such as chain scission and condensation occurred during hydrothermal carbonization processes. Overall, HTC was found to be an effective refinery treatment for converting different waste biomass into valuable energy materials and chemicals.

Authors:

^[1]; Huang, Lang ^[2]; Yu, Shitao ^[1]; Liu, Shiwei ^[1]; Xie, Congxia ^[1];

^[3]

Qingdao Univ. of Science adn Technology (China)
Washington State Univ., Pullman, WA (United States)
Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Publication Date:: Fri May 26 00:00:00 EDT 2017

Research Org.:: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Biological and Environmental Research (BER)

OSTI Identifier:: 1376590

Grant/Contract Number:: AC05-00OR22725

Resource Type:: Accepted Manuscript

Journal Name:: ACS Sustainable Chemistry & Engineering

Additional Journal Information:: Journal Volume: 5; Journal Issue: 7; Journal ID: ISSN 2168-0485

Publisher:: American Chemical Society (ACS)

Country of Publication:: United States

Language:: English

Subject:: 09 BIOMASS FUELS; Biomass; Carbonaceous materials; NMR techniques; Thermal conversion

Citation Formats


                    Wu, Qiong, Huang, Lang, Yu, Shitao, Liu, Shiwei, Xie, Congxia, and Ragauskas, Arthur J. Comparative Study of the Structure of Hydroproducts Derived from Loblolly Pine and Straw Grass.  United States: N. p., 2017. 
Web.  doi:10.1021/acssuschemeng.7b01005.

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                    Wu, Qiong, Huang, Lang, Yu, Shitao, Liu, Shiwei, Xie, Congxia, & Ragauskas, Arthur J. Comparative Study of the Structure of Hydroproducts Derived from Loblolly Pine and Straw Grass.  United States.  https://doi.org/10.1021/acssuschemeng.7b01005

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                    Wu, Qiong, Huang, Lang, Yu, Shitao, Liu, Shiwei, Xie, Congxia, and Ragauskas, Arthur J. Fri .  
"Comparative Study of the Structure of Hydroproducts Derived from Loblolly Pine and Straw Grass".  United States.  https://doi.org/10.1021/acssuschemeng.7b01005.  https://www.osti.gov/servlets/purl/1376590.

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@article{osti_1376590,

  title        = {Comparative Study of the Structure of Hydroproducts Derived from Loblolly Pine and Straw Grass},

  author       = {Wu, Qiong and Huang, Lang and Yu, Shitao and Liu, Shiwei and Xie, Congxia and Ragauskas, Arthur J.},

  abstractNote = {We investigated the structural characteristics of products derived from the hydrothermal carbonization (HTC) of loblolly pine (LP) and straw grass (SG) via solid-state cross-polarization/magic angle spinning nuclear magnetic resonance (CP/MAS 13C NMR), heteronuclear single-quantum correlation nuclear magnetic resonance (HSQC-NMR), and solution 13C NMR and 31P NMR techniques. Our results revealed that after HTC, hydrochars from both LP and SG mainly consisted of a combination of lignin, furfural, and condensed polyaromatic structures with a high level of fixed carbon content and higher heating value (HHV). Hydrochar from LP exhibited a higher aryl to furan ratio, and those from SG contained more aliphatic functional groups. Solution 13C NMR and HSQC revealed that both liquid chemicals were condensed polyphenolic structures with aliphatic groups that exist mainly in the form of side chains. Although the LP products exhibited a higher proportion of aromatic structures, the types of polyphenol and aliphatic C–H were more diverse in the SG products. Results also indicated that reactions such as chain scission and condensation occurred during hydrothermal carbonization processes. Overall, HTC was found to be an effective refinery treatment for converting different waste biomass into valuable energy materials and chemicals.},

  doi          = {10.1021/acssuschemeng.7b01005},

  journal      = {ACS Sustainable Chemistry & Engineering},

  number       = 7,

  volume       = 5,

  place        = {United States},

  year         = {Fri May 26 00:00:00 EDT 2017},

  month        = {Fri May 26 00:00:00 EDT 2017}

}

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