Gamma-valerolactone biorefinery: Catalyzed birch fractionation and valorization of pulping streams with solvent recovery

Granatier, Marianna; Lê, Huy; Ma, Yibo; Rissanen, Marja; Schlapp‐Hackl, Inge; Diment, Daryna; Zaykovskaya, Anna; Pokki, Juha-Pekka; Balakshin, Mikhail; Louhi-Kultanen, Marjatta; Alopaeus, Ville; Sixta, Herbert

doi:10.1016/j.heliyon.2023.e17423

Cited by 6 publications

(3 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The pulp was transformed into fibers for textiles, while lignin was processed into polyhydroxyurethane. Similar to the former work described, GVL recovery was unsatisfactory; 66% recovery was attained in the extraction column …”

Section: Key Considerations For Gvl Pretreatment Of Lignocellulosic B...supporting

confidence: 71%

“…Similar to the former work described, GVL recovery was unsatisfactory; 66% recovery was attained in the extraction column. 114 In addition to the significant progress achieved to date, a kinetic study concerning the GVL pretreatment of biomass has not been conducted. That is a significant gap and also an opportunity to consider, which could provide more comprehension of the mechanisms of GVL-lignocellulose interaction and, therefore, may necessitate in-line spectroscopic strategies to monitor the progress of the heterogeneous reaction.…”

Section: Key Considerations For Gvl Pretreatment Of Lignocellulosic B...mentioning

confidence: 99%

See 1 more Smart Citation

Challenges and Opportunities for Gamma-Valerolactone in Biomass Pretreatment

Haykir,

Viell

2024

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Solvent-aided biomass pretreatment strategies for biorefineries need to address several key points including effective biomass valorization, energy demand, and waste minimization. More specifically, solvents' yield, recovery, and recycling are crucial parameters to improve biorefineries' environmental and economic performances. Gamma-valerolactone (GVL) presents significant promise in biomass pretreatment due to its ability to effectively remove hemicellulose and lignin or provide near-complete biomass solubilization and facilitate hydrolysis. However, GVL utilization is challenging due to its higher cost and the difficulty of recycling it as a high-boiling solvent. Herein, we discuss biomass pretreatment with GVL and solvent recovery. GVL recovery, being conceptual at this stage, has to be proven in the field. It could be realized through liquid−liquid extraction. However, most studies do not address the reutilization of GVL, the separation of heavy-boiling impurities, or the solid−liquid separation of the remaining solids, which are significant gaps in the literature and a limitation to industrialization.

show abstract

Section: Key Considerations For Gvl Pretreatment Of Lignocellulosic B...supporting

confidence: 71%

Section: Key Considerations For Gvl Pretreatment Of Lignocellulosic B...mentioning

confidence: 99%

Challenges and Opportunities for Gamma-Valerolactone in Biomass Pretreatment

Haykir,

Viell

2024

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

show abstract

“…Therefore, the removal of residual hemicellulose in the chemical pulp is essential for the preparation of dissolving pulp (Janzon et al 2008). Because of the excellent swelling properties of GVL, the compact structure of the fibers become loose after treating the chemical pulp with GVL (Shokoufeh et al 2022;Granatier et al 2021;Granatier et al 2023b;). The hemicellulose hydrolyzes into much smaller fragments in a small amount of sulfuric acid, thus facilitating hemicellulose removal.…”

Section: Advantage Of Using Gvl For Pulp Upgradingmentioning

confidence: 99%

Upgrading paper-grade bleached hardwood pulp towards dissolving pulp using γ-valerolactone

Liu,

Wang

et al. 2024

BioRes

View full text Add to dashboard Cite

γ-Valerolactone (GVL) is a promising biomass-based platform compound that can be used for the removal of hemicellulose in pulp. In this study, a paper-grade pulp was treated using GVL to generate dissolving pulp for viscose production. The GVL concentration, treatment temperature, and reaction time had significant effect on the hemicellulose dissolution. The dissolving pulp with α-cellulose content of 92.3% and hemicellulose content of 5.45% was achieved with 60% GVL at 120 °C for 2 h. The Fock reactivity and intrinsic viscosity of the obtained dissolving pulp were 54.6% and 595 mL/g, which is comparable with the commercial product. In addition, GVL spent liquor was also recycled and reused to upgrade paper-grade pulp. By using purified recycled GVL to treat original pulp, the Fock reactivity of pulp was improved, and the cellulose content of as-prepared upgraded pulp increased to 92.1%, which was close to the cellulose content of dissolving pulp obtained from fresh GVL solution, while the intrinsic viscosity decreased significantly to 598 mL/g. Therefore, the efficient reuse of GVL not only ensured the high quality of dissolving pulp, but it also saved production costs and reduced environmental pollution.

show abstract