Conversion of levulinic acid from various herbaceous biomass species using hydrochloric acid and effects of particle size and delignification

Indra Neel Pulidindi; Tae Hyun Kim

doi:10.3390/en11030621

Conversion of levulinic acid from various herbaceous biomass species using hydrochloric acid and effects of particle size and delignification

Indra Neel Pulidindi, Tae Hyun Kim

Hanyang University

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

Acid catalyzed hydrothermal conversion of levulinic acid (LA) from various herbaceous materials including rice straw (RS), corn stover (CS), sweet sorghum bagasse (SSB), and Miscanthus (MS) was evaluated. With 1 M HCl, 150^◦C, 5 h, 20 g/L solid loading, the yields of LA from untreated RS, CS, SSB and MS based on the glucan content were 60.2, 75.1, 78.5 and 61.7 wt %, respectively. It was also found that the particle size had no significant effect on LA conversion yield with >3 h reaction time. With delignification using simulated green liquor (Na₂CO₃-Na₂S, 20 wt % total titratable alkali (TTA), 40 wt % sulfidity) at 200^◦C for 15 min, lignin removal was in the range of 64.8-91.2 wt %. Removal of both lignin and xylan during delignification increased the glucan contents from 33.0-44.3 of untreated biomass to 61.7-68.4 wt % of treated biomass. Delignified biomass resulted in much lower conversion yield (50.4-56.0 wt %) compared to 60.2-78.5 wt % of untreated biomass. Nonetheless, the concentration of LA in the product was enhanced by a factor of ~1.5 with delignification.

Original language	English
Article number	en11030621
Journal	Energies
Volume	11
Issue number	3
DOIs	https://doi.org/10.3390/en11030621
State	Published - 25 Feb 2018
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license.

Funding

This work was supported by the R&D program of MOTIE/KETEP (No. 20153010091990) and the Brain Pool Program of the KOFST/MSIP (No. 162S-4-3-1683). The authors would like to express their sincere thanks to Phuong Vi Truong Nguyen and Thi Thu Huong Pham in our laboratory for their assistance.

Funders	Funder number
Korean Federation of Science and Technology Societies	162S-4-3-1683
Korea Institute of Energy Technology Evaluation and Planning	20153010091990

Keywords

Biofuel
Hydrochloric acid
Lignin
Lignocellulosic biomass
Pretreatment

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.3390/en11030621

Cite this

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abstract = "Acid catalyzed hydrothermal conversion of levulinic acid (LA) from various herbaceous materials including rice straw (RS), corn stover (CS), sweet sorghum bagasse (SSB), and Miscanthus (MS) was evaluated. With 1 M HCl, 150◦C, 5 h, 20 g/L solid loading, the yields of LA from untreated RS, CS, SSB and MS based on the glucan content were 60.2, 75.1, 78.5 and 61.7 wt %, respectively. It was also found that the particle size had no significant effect on LA conversion yield with >3 h reaction time. With delignification using simulated green liquor (Na2CO3-Na2S, 20 wt % total titratable alkali (TTA), 40 wt % sulfidity) at 200◦C for 15 min, lignin removal was in the range of 64.8-91.2 wt %. Removal of both lignin and xylan during delignification increased the glucan contents from 33.0-44.3 of untreated biomass to 61.7-68.4 wt % of treated biomass. Delignified biomass resulted in much lower conversion yield (50.4-56.0 wt %) compared to 60.2-78.5 wt % of untreated biomass. Nonetheless, the concentration of LA in the product was enhanced by a factor of ~1.5 with delignification.",

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N2 - Acid catalyzed hydrothermal conversion of levulinic acid (LA) from various herbaceous materials including rice straw (RS), corn stover (CS), sweet sorghum bagasse (SSB), and Miscanthus (MS) was evaluated. With 1 M HCl, 150◦C, 5 h, 20 g/L solid loading, the yields of LA from untreated RS, CS, SSB and MS based on the glucan content were 60.2, 75.1, 78.5 and 61.7 wt %, respectively. It was also found that the particle size had no significant effect on LA conversion yield with >3 h reaction time. With delignification using simulated green liquor (Na2CO3-Na2S, 20 wt % total titratable alkali (TTA), 40 wt % sulfidity) at 200◦C for 15 min, lignin removal was in the range of 64.8-91.2 wt %. Removal of both lignin and xylan during delignification increased the glucan contents from 33.0-44.3 of untreated biomass to 61.7-68.4 wt % of treated biomass. Delignified biomass resulted in much lower conversion yield (50.4-56.0 wt %) compared to 60.2-78.5 wt % of untreated biomass. Nonetheless, the concentration of LA in the product was enhanced by a factor of ~1.5 with delignification.

AB - Acid catalyzed hydrothermal conversion of levulinic acid (LA) from various herbaceous materials including rice straw (RS), corn stover (CS), sweet sorghum bagasse (SSB), and Miscanthus (MS) was evaluated. With 1 M HCl, 150◦C, 5 h, 20 g/L solid loading, the yields of LA from untreated RS, CS, SSB and MS based on the glucan content were 60.2, 75.1, 78.5 and 61.7 wt %, respectively. It was also found that the particle size had no significant effect on LA conversion yield with >3 h reaction time. With delignification using simulated green liquor (Na2CO3-Na2S, 20 wt % total titratable alkali (TTA), 40 wt % sulfidity) at 200◦C for 15 min, lignin removal was in the range of 64.8-91.2 wt %. Removal of both lignin and xylan during delignification increased the glucan contents from 33.0-44.3 of untreated biomass to 61.7-68.4 wt % of treated biomass. Delignified biomass resulted in much lower conversion yield (50.4-56.0 wt %) compared to 60.2-78.5 wt % of untreated biomass. Nonetheless, the concentration of LA in the product was enhanced by a factor of ~1.5 with delignification.

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Conversion of levulinic acid from various herbaceous biomass species using hydrochloric acid and effects of particle size and delignification

Abstract

Bibliographical note

Funding

Keywords

UN SDGs

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