Effects of Torrefaction Temperature on Pyrolysis Vapor Products of Woody and Herbaceous Feedstocks

Starace, Anne K.; Evans, Robert J.; Lee, David D.; Carpenter, Daniel L.

doi:10.1021/acs.energyfuels.6b00267

Title: Effects of Torrefaction Temperature on Pyrolysis Vapor Products of Woody and Herbaceous Feedstocks

Journal Article · Fri Jun 17 00:00:00 EDT 2016 · Energy and Fuels

DOI:https://doi.org/10.1021/acs.energyfuels.6b00267· OSTI ID:1278316

Starace, Anne K. ^[1]; Evans, Robert J. ^[1]; Lee, David D. ^[1]; Carpenter, Daniel L. ^[1]

National Renewable Energy Lab. (NREL), Golden, CO (United States)

A variety of hardwood, softwood, and herbaceous feedstocks (oak, southern yellow pine mix, loblolly pine, pinyon-juniper mix, and switchgrass) were each torrefied at 200, 250, and 300 °C. Each of the feedstocks was pyrolyzed and the resulting vapors were analyzed with a molecular beam mass spectrometer (py-MBMS). Compositional analysis was used to measure the total lignin content of three of the feedstocks (southern yellow pine, softwood; oak, hardwood; and switchgrass, herbaceous) before and after torrefaction at 300 °C, and large differences in the fraction of lignin lost during torrefaction were found between feedstocks, with oak having the largest decrease in lignin during torrefaction and switchgrass having the least. Finally, it is hypothesized that these differences in the thermal degradation are due to, in part, the different ratios of S, G, and H lignins in the feedstocks. Additionally, the torrefaction of kraft lignin was studied using thermogravimetric analysis coupled with Fourier transform infrared spectroscopy (TGA-FTIR) and attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR).

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Research Organization:: National Renewable Energy Laboratory (NREL), Golden, CO (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Sustainable Transportation Office. Bioenergy Technologies Office (BETO)

Grant/Contract Number:: AC36-08GO28308

OSTI ID:: 1278316

Report Number(s):: NREL/JA-5100-65847

Journal Information:: Energy and Fuels, Vol. 30, Issue 7; ISSN 0887-0624

Publisher:: American Chemical Society (ACS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 7 works

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References (25)

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