Chemical characterization of tagasaste (Chamaecytisus proliferus spp. palmensis) fibers and their fate after organosolv pulping
TL;DRAbstract
The chemical characterization of tagasaste fibers (Chamaecytisus proliferus spp. palmensis) and the fate of their main constituents after organosolv pulping were studied, with especial emphasis in lignin and lipophilic extractives. Py-GC/MS of fibers and pulp showed a lignin with a S/G molar ratio of 1.7 and 1.3, respectively, indicating minor changes in the lignin composition during organosolv pulping. The main lipids identified by GC/MS of extracts from tagasaste fibers were series of fatty acids, -hydroxy acids, sterols and steroid ketones. Other compounds, such as esters of p-hydroxycinnamic acids (ferulic and p-coumaric acids) and sterol glycosides were also found in minor amounts. The organosolv pulp showed much lower amounts of lipids than the fiber, being mostly fatty acids. The rest of lipophilic compounds were removed to a great extent during the pulping process.
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The chemical characterization of tagasaste fibers (Chamaecytisus proliferus spp. palmensis) and the fate of their main constituents after organosolv pulping were studied, with especial emphasis in lignin and lipophilic extractives. Py-GC/MS of fibers and pulp showed a lignin with a S/G molar ratio of 1.7 and 1.3, respectively, indicating minor changes in the lignin composition during organosolv pulping. The main lipids identified by GC/MS of extracts from tagasaste fibers were series of fatty acids, -hydroxy acids, sterols and steroid ketones. Other compounds, such as esters of p-hydroxycinnamic acids (ferulic and p-coumaric acids) and sterol glycosides were also found in minor amounts. The organosolv pulp showed much lower amounts of lipids than the fiber, being mostly fatty acids. The rest of lipophilic compounds were removed to a great extent during the pulping process.
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