Effects of torrefaction and densification on switchgrass pyrolysis products

Yang, Zixu; Sarkar, Madhura; Kumar, Ajay; Tumuluru, Jaya Shankar; Huhnke, Raymond L.

doi:10.1016/j.biortech.2014.10.032

Title: Effects of torrefaction and densification on switchgrass pyrolysis products

Journal Article · Mon Dec 01 00:00:00 EST 2014 · Bioresource Technology

DOI:https://doi.org/10.1016/j.biortech.2014.10.032· OSTI ID:1162227

Yang, Zixu ^[1]; Sarkar, Madhura ^[1]; Kumar, Ajay ^[1]; Tumuluru, Jaya Shankar ^[2]; Huhnke, Raymond L. ^[1]

Oklahoma State Univ., Stillwater, OK (United States) Dept. of Biosystems and Agricultural Engineering
Idaho National Lab. (INL), Idaho Falls, ID (United States)

Abstract The pyrolysis behaviors of four types of pretreated switchgrass (torrefied at 230 and 270 °C, densification, and torrefaction at 270 ºC followed by densification) were studied at three temperatures (500, 600, 700 ºC) using a pyroprobe attached to a gas chromatogram mass spectroscopy (Py-GC/MS). The torrefaction of switchgrass improved its oxygen to carbon ratio and energy content. Contents of anhydrous sugars and phenols in pyrolysis products of torrefied switchgrass were higher than those in pyrolysis products of raw switchgrass. As the torrefaction temperature increased from 230 to 270 °C, the contents of anhydrous sugars and phenols in pyrolysis products increased whereas content of guaiacols decreased. High pyrolysis temperature (600 and 700 °C as compared to 500 °C) enhanced decomposition of lignin and anhydrous sugars, leading to increase in phenols, aromatics and furans. Densification enhanced depolymerization of cellulose and hemicellulose during pyrolysis.

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

Sponsoring Organization:: USDOE

Grant/Contract Number:: EPS-0814361

OSTI ID:: 1162227

Report Number(s):: INL/JOU-14-33542; PII: S0960852414014539

Journal Information:: Bioresource Technology, Vol. 174, Issue C; ISSN 0960-8524

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 56 works

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Torrefaction process optimization of agriwaste for energy densification Mukhtar, Hina; Feroze, Nadeem; Munir, Hafiz Muhammad Shahzad Energy Sources, Part A: Recovery, Utilization, and Environmental Effects https://doi.org/10.1080/15567036.2019.1609626	journal	April 2019
HHV Predicting Correlations for Torrefied Biomass Using Proximate and Ultimate Analyses Nhuchhen, Daya; Afzal, Muhammad Bioengineering, Vol. 4, Issue 4 https://doi.org/10.3390/bioengineering4010007	journal	January 2017
Modelling of thermochemical energy recovery processes for switchgrass ( Panicum virgatum ) Ighalo, Joshua O.; Adeniyi, Adewale George Indian Chemical Engineer https://doi.org/10.1080/00194506.2020.1711535	journal	January 2020
An “In-Situ Binding” Approach to Produce Torrefied Biomass Briquettes Bioengineering, Vol. 6, Issue 4 https://doi.org/10.3390/bioengineering6040087	journal	September 2019
Surface Chemical Changes of Sugar Maple Wood Induced by Thermo-Hygromechanical (THM) Treatment Fu, Qilan; Cloutier, Alain; Laghdir, Aziz Materials, Vol. 12, Issue 12 https://doi.org/10.3390/ma12121946	journal	June 2019

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