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Title: Solid-State NMR Investigation of Bio-chars Produced from Biomass Components and Whole Biomasses

Abstract

Bio-char is a by-product from thermochemical treatment of biomass and has been identified as an energy condensed product with a comparable heating value as commercial coal. However, the combustion of such solid product as an energy resource is only a preliminary application. It is highly possible to convert bio-char, which always has a condensed aromatic and porous structure to various high-value products. The investigations of the structures and formation pathways for the bio-char are very important to any future applications. In this study, six different biomass components, including cellulose, lignin, and tannin, and three whole biomasses—pine wood, pine residue, and pine bark—have been used to produce bio-char at 400, 500, and 600 °C. Solid-state NMR and FT-IR have been employed in this study to characterize the structures for the bio-chars. The results indicated that the bio-chars produced from lignin contained some methoxyl groups, and the bio-chars produced from tannin contained significantly higher amount of phenolic hydroxyl groups. Compared to the bio-chars produced from pine wood and residue, the bio-chars produced from pine bark contained more aromatic C–O bonds, and aliphatic C–O and C–C bonds, which may be due to the significantly higher amount of lignin and tannin in the pinemore » bark. Furthermore, the elevated amounts of aromatic C–O and aliphatic C–O and C–C bonds in the bio-chars from pine bark appeared to be completely decomposed at 600 °C.« less

Authors:
ORCiD logo [1];  [2];  [1]; ORCiD logo [3]
  1. Key Lab. of Energy Thermal Conversion and Control of Ministry of Education, Nanjing (China); Southeast Univ., Nanjing (China)
  2. Univ. of Tennessee, Knoxville, TN (United States)
  3. Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER) (SC-23); National Key Research and Development Program of China
OSTI Identifier:
1394610
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
BioEnergy Research
Additional Journal Information:
Journal Volume: 10; Journal ID: ISSN 1939-1234
Publisher:
Springer
Country of Publication:
United States
Language:
English
Subject:
09 BIOMASS FUELS; Bio-char; Biomass; Biomass components; NMR Pyrolysis

Citation Formats

Ben, Haoxi, Hao, Naijia, Liu, Qian, and Ragauskas, Arthur J. Solid-State NMR Investigation of Bio-chars Produced from Biomass Components and Whole Biomasses. United States: N. p., 2017. Web. doi:10.1007/s12155-017-9863-2.
Ben, Haoxi, Hao, Naijia, Liu, Qian, & Ragauskas, Arthur J. Solid-State NMR Investigation of Bio-chars Produced from Biomass Components and Whole Biomasses. United States. doi:10.1007/s12155-017-9863-2.
Ben, Haoxi, Hao, Naijia, Liu, Qian, and Ragauskas, Arthur J. Thu . "Solid-State NMR Investigation of Bio-chars Produced from Biomass Components and Whole Biomasses". United States. doi:10.1007/s12155-017-9863-2. https://www.osti.gov/servlets/purl/1394610.
@article{osti_1394610,
title = {Solid-State NMR Investigation of Bio-chars Produced from Biomass Components and Whole Biomasses},
author = {Ben, Haoxi and Hao, Naijia and Liu, Qian and Ragauskas, Arthur J.},
abstractNote = {Bio-char is a by-product from thermochemical treatment of biomass and has been identified as an energy condensed product with a comparable heating value as commercial coal. However, the combustion of such solid product as an energy resource is only a preliminary application. It is highly possible to convert bio-char, which always has a condensed aromatic and porous structure to various high-value products. The investigations of the structures and formation pathways for the bio-char are very important to any future applications. In this study, six different biomass components, including cellulose, lignin, and tannin, and three whole biomasses—pine wood, pine residue, and pine bark—have been used to produce bio-char at 400, 500, and 600 °C. Solid-state NMR and FT-IR have been employed in this study to characterize the structures for the bio-chars. The results indicated that the bio-chars produced from lignin contained some methoxyl groups, and the bio-chars produced from tannin contained significantly higher amount of phenolic hydroxyl groups. Compared to the bio-chars produced from pine wood and residue, the bio-chars produced from pine bark contained more aromatic C–O bonds, and aliphatic C–O and C–C bonds, which may be due to the significantly higher amount of lignin and tannin in the pine bark. Furthermore, the elevated amounts of aromatic C–O and aliphatic C–O and C–C bonds in the bio-chars from pine bark appeared to be completely decomposed at 600 °C.},
doi = {10.1007/s12155-017-9863-2},
journal = {BioEnergy Research},
number = ,
volume = 10,
place = {United States},
year = {2017},
month = {8}
}

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Works referenced in this record:

Pyrolysis of Wood/Biomass for Bio-oil: A Critical Review
journal, May 2006

  • Mohan, Dinesh; Pittman,, Charles U.; Steele, Philip H.
  • Energy & Fuels, Vol. 20, Issue 3, p. 848-889
  • DOI: 10.1021/ef0502397