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The novel method to reduce the silica content in lignin recovered from black liquor originating from rice straw

Engineering and Technology

The novel method to reduce the silica content in lignin recovered from black liquor originating from rice straw

N. H. Do, H. H. Pham, et al.

This groundbreaking research conducted by Nghi H. Do, Hieu H. Pham, Tan M. Le, Jeroen Lauwaert, Ludo Diels, An Verberckmoes, Nga H. N. Do, Viet T. Tran, and Phung K. Le explores an innovative method to significantly reduce silica content in lignin from rice straw. By employing a two-step acidification process, they achieved a remarkable 94.38% silica removal, paving the way for high-quality lignin production at an industrial scale.

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Playback language: English
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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