We introduce the optimization of the pulping conditions and propose different chemical recovery options for a proven biorefinery concept based on γ-valerolactone (GVL)/water fractionation. The pulping process has been optimized whereby the liquor-to-wood (L:W) ratio could be reduced to 3 L/kg without compromising the pulp properties as raw material for textile fibers production. The recovery of the pulping solvent was performed through combinations of lignin precipitation by water addition, distillation at reduced pressure, and liquid CO extraction. With a two-step lignin precipitation coupled with vacuum distillation, more than 90% of lignin and GVL could be recovered from the spent liquor. However, a significant part of GVL remained unrecoverable in the residue, which was a highly viscous liquid with complicated phase behavior. The recovery by lignin precipitation combined with liquid CO extraction could recover more than 85% GVL and 90% lignin without forming any problematic residue as in the distillation process. The remaining GVL remained in the raffinate containing a low amount of lignin and other compounds, which can be further processed to isolate the GVL and improve the recovery rate.
Download full-text PDF |
Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6237546 | PMC |
| http://dx.doi.org/10.1021/acs.iecr.8b03723 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Review on the application of biomass-based aerogels in the field of thermal insulation.
Int J Biol Macromol
January 2025
National Engineering Laboratory for Modern Silk, College of Textile and Clothing Engineering, Soochow University, 199 Ren-Ai Road, Suzhou 215123, China. Electronic address:
The continuous progression of industrialisation and the burgeoning global population have precipitated the non-renewable energy crisis and exacerbated environmental problems, thereby stimulating a huge demand for production of environmentally friendly materials. Typically, biomass-based aerogels (BAs) derived from cellulose, chitosan (CS), lignin, and alginate have been gradually captivating the attention of researchers owing to their high specific surface area, substantial porosity, low density, porous architecture, and biodegradability. In this review, we demonstrate the sustainability of BAs by contrasting the overall advantages or disadvantages of BAs with those of synthetic alternatives in terms of cost, insulation performance, and planetary boundaries.
View Article and Find Full Text PDFApplication of perovskite type oxide La Ce coo in lignin depolymerization and mono-phenol preparation.
RSC Adv
January 2025
School of Materials and Chemical Engineering, Chuzhou University Chuzhou Anhui 239000 China
This study successfully prepared La Ce CoO ( = 0.2, 0.4, 0.
View Article and Find Full Text PDFSynthesis of ZIF-67 composite lignin hydrogel and its catalytic degradation of naphthalene by PMS in wastewater.
Int J Biol Macromol
January 2025
College of Chemistry and Environmental Engineering, Yangtze University, Jingzhou 434023, People's Republic of China; China National Petroleum Corporation HSE Key Laboratory (Yangtze University Research Laboratory), Jingzhou 434023, People's Republic of China.
The incorporation of ZIF-67 into hydrogels for wastewater pollutant remediation has been widely studied, but the synthesis often requires organic solvents such as methanol or ethanol, which can result in the generation of toxic liquid waste. In this study, a novel hydrogel (ZIF-67@SL) was synthesized by integrating ZIF-67 into a dual-network system of sodium lignosulfonate (SL) and acrylamide (AM) using an in situ precipitation method in water. The material was characterized by XRD, FTIR, XPS, SEM, TEM, BET, and TGA analyses.
View Article and Find Full Text PDFFabrication of lignin nanoparticles with adjustable size, antioxidant, antibacterial, and hydrophobic properties by a two-step fractionation.
Int J Biol Macromol
January 2025
Beijing Key Laboratory of Lignocellulosic Chemistry, and Engineering Research Center of Forestry Biomass Materials and Energy, Ministry of Education, Beijing Forestry University, Beijing 100083, China. Electronic address:
Article Synopsis
- Lignin nanoparticles (LNPs) are being recognized for their eco-friendly properties and potential in sustainable materials.
- A new two-step fractionation technique has created four lignin fractions (F1, F2, F3, and F4) with optimal characteristics for LNPs production, achieving a high recovery rate of 88.7% from alkali lignin.
- The study highlights how the size and structural properties of LNPs can be controlled for better antibacterial and antioxidant performance, particularly favoring a higher syringyl/guaiacyl ratio for smaller nanoparticles.
Extraction of high-purity lignin from the kraft pulping black liquor by enzyme purification process with alkaline-resistant xylanase and cellulase.
Int J Biol Macromol
January 2025
Shandong Huatai Paper Co., Ltd. & Shandong Yellow Triangle Biotechnology Industry Research Institute Co. LTD, Dongying 257335, China.
In this study, the response surface methodology was first utilized to optimize the enzyme treatment conditions as reaction pH, temperature, time and enzyme dosage of 9.5, 45 °C, 94.5 min and 100 U/L.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!