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

Ben, Haoxi; Hao, Naijia; Liu, Qian; Ragauskas, Arthur J.

doi:10.1007/s12155-017-9863-2

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

Journal Article · Thu Aug 24 00:00:00 EDT 2017 · BioEnergy Research

DOI:https://doi.org/10.1007/s12155-017-9863-2· OSTI ID:1394610

^[1]; Hao, Naijia ^[2]; Liu, Qian ^[1];

^[3]

Key Lab. of Energy Thermal Conversion and Control of Ministry of Education, Nanjing (China); Southeast Univ., Nanjing (China)
Univ. of Tennessee, Knoxville, TN (United States)
Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

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.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Biological and Environmental Research (BER); National Key Research and Development Program of China

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1394610

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

Publisher:: SpringerCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 6 works

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