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- Title
Impact Factors of Bagasse Lignin Liquefaction and Characterization of Its Products.
- Authors
QIN Qiong-lin; LIU Jin-ming; XIE En-jun; FENG Rui; ZHANG Jian-hui; GAN Wei-xing
- Abstract
Biomass liquefaction is an useful technique to realize the high-value conversion and recycling uses of agricultural and forestry waste, as well as for substituting chemical feedstocks. In this paper, the organic solvent liquefaction method was used to liquefy bagasse lignin. The effects of different liquefaction parameters (catalyst dosage, liquid-solid ratio, liquefaction temperature, liquefaction time) on the liquefaction efficiency of bagasse lignin were explored, and its liquefaction products were also characterized. The results showed that the optimized process parameters for liquefaction of bagasse lignin were as follows: the liquefaction temperature was 150, the liquefaction time was 1 h, the liquid-solid ratio was 3:1, the catalyst dosage was 15%, and the residue rate of bagasse lignin was 0.87%. Under the combined action of phenol and sulfuric acid, bagasse lignin was degraded from its original spherical and spherical concave structure into residual particles. The ether bonds and the carbon-carbon bonds connecting the macromolecular structure of bagasse lignin were broken in different ways during the liquefaction process, such as pyrolysis, dehydration, dehydrogenation, deoxygenation, and decarboxylation. Subsequently, small molecular fragments in the liquefied intermediate products rearranged through condensation, hydroxyl methylation, and etherification reactions. Finally, stable and complex mixtures generated, which were soluble in phenol.
- Subjects
BAGASSE; LIGNINS; BIOMASS liquefaction; CARBON-carbon bonds; AGRICULTURAL wastes; LIGNIN structure
- Publication
China Forest Products Industry, 2024, Vol 61, Issue 5, p6
- ISSN
1001-5299
- Publication type
Article
- DOI
10.19531/j.issn1001-5299.202405002