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Abstract
Difficulties in lignin production from rice straw due to high silica content reduce its recovery yield and applications. This study develops a novel method to reduce silica content in lignin from rice straw by monitoring precipitation behavior and chemical structure during single-stage acidification at varying pH values. A two-step acidification process using 20% sulfuric acid at pH 9 and pH 3 achieves 94.38% silica removal, enabling high-quality lignin production from rice straw at an industrial scale.
Publisher
Scientific Reports
Published On
Dec 04, 2020
Authors
Nghi H. Do, Hieu H. Pham, Tan M. Le, Jeroen Lauwaert, Ludo Diels, An Verberckmoes, Nga H. N. Do, Viet T. Tran, Phung K. Le
Tags
lignin production
rice straw
silica removal
acidification process
biomass utilization

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