Holistic Valorization of Hemp through Reductive Catalytic Fractionation
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Despite the increased use of hemp fiber, negligible attention has been given to upgrade the hemp hurd, which constitutes up to 70 wt % of the hemp stalk and is currently considered a low-value byproduct. In this work, valorization of hemp hurd was performed by reductive catalytic fractionation (RCF) in the presence of a metal catalyst. We found an unexpectedly high yield of monophenolic compounds (38.3 wt %) corresponding to above 95% of the theoretical maximum yield. The high yield is explained by both a thin cell wall and high S-lignin content. In addition, organosolv pulping was performed to generate a pulp that was bleached to produce dissolving-grade pulp suitable for textile fiber production (viscosity, 898 mL/g; ISO-brightness, 90.2%) and nanocellulose. Thus, we have demonstrated a novel value chain from a low-value side stream of hemp fiber manufacture that has the potential to increase textile fiber production with 100% yield and also give bio-oil for green chemicals.
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Hemp hurds account for about two-thirds of the plant by weight (70 to 75% of the hemp stalk) and are often overlooked as a low-value residue byproduct.
“Although hemp hurds account for about two-thirds of the plant by weight (70 to 75% of the hemp stalk) which is a sustainable fiber source, yet often overlooked as a low-value residue byproduct (Momeni et al. 2021; Muangmeesri et al. 2021; Pal and Lucia 2019).”
From A critical review of industrial fiber hemp anatomy, agronomic practices, and valorization into sustainable bioproducts (2025) · cites this paper as Muangmeesri et al. 2021
The Introduction states that hemp hurd constitutes 70 wt % of hemp stalks and is a byproduct of textile fiber production used for low-value applications. It does not establish that hurd makes up two-thirds of the whole plant by weight or give the upper figure of 75%. (LLM, conf=0.87)
Experimental — accuracy not yet measuredOrganosolv pulping, using an ethanol-water mixture, has also been effective for fiber extraction.
“Organosolv pulping, using an ethanol-water mixture, has also been effective for fiber extraction (Muangmeesri et al. 2021).”
From A critical review of industrial fiber hemp anatomy, agronomic practices, and valorization into sustainable bioproducts (2025) · cites this paper as Muangmeesri et al. 2021
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Basak, M., Broadway, M., Lewis, J., Starkey, H., Bloomquist, M., Peszlen, I., Davis, J., Lucia, L. A., & Pal, L. (2025) · BioResources · doi:10.15376/biores.20.2.basak · Cited by 22 · see citing works
“Organosolv pulping, using an ethanol-water mixture, has also been effective for fiber extraction (Muangmeesri et al. 2021).”
Motsa, L., Seedat, N., Mekuto, L., & Sekoai, P. (2026) · Biomass Conversion and Biorefinery · doi:10.1007/s13399-026-07177-9
Deng, N., Pasbakhsh, P., Zhang, Z., Sofi, M., Gupta, S., & Lumantarna, E. (2026) · Industrial Crops and Products · doi:10.1016/j.indcrop.2026.124623
- Authors
- Muangmeesri, S., Li, N., Georgouvelas, D., Ouagne, P., Placet, V., Mathew, A. P., & Samec, J. S. M.
- Affiliations
- Stockholm University (SE)
- École Nationale d'Ingénieurs de Tarbes (FR)
- Centre National de la Recherche Scientifique (FR)
- Corresponding author
- Mathew, Aji P.
- Samec, Joseph S. M.
- ORCID
- Venue
- ACS Sustainable Chemistry & Engineering
- Publisher
- American Chemical Society (ACS)
- Published
- 2021-12-15
- Volume
- 9
- Issue
- 51
- Pages
- 17207-17213
- ISSN
- 2168-0485 (ISSN-L)
- PMC
- PMC8715730
- OpenAlex
- W4200020184
- Cited by
- 1
- References
- 56
- Citations by year
- 2026: 1
- FWCI
- 0.00
- Type
- journal article
- Language
- en
- Open access
- hybrid
- doi.org
- Locations
- ACS Sustainable Chemistry & Engineering (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- HAL (submittedVersion, other-oa)
- Funders
- H2020 Environment (744349)
- Stiftelsen f??r Milj??strategisk Forskning (2018/11)
- Topics
- Physical Sciences › Engineering › Biomedical Engineering › Lignin and Wood Chemistry
- Physical Sciences › Engineering › Biomedical Engineering › Catalysis for Biomass Conversion
- Physical Sciences › Engineering › Biomedical Engineering › Biofuel production and bioconversion
- Keywords
- hemp hurd, reductive catalytic fractionation, lignin valorization, organosolv pulping, textile fibers, nanocellulose, bio-oil, green chemicals
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