A Novel and Effective Recyclable BiOCl/BiOBr Photocatalysis for Lignin Removal from Pre-Hydrolysis Liquor

Nanomaterials

卷:11

Guihua Yang¹  Jiachuan Chen¹  Qimeng Jiang¹  Jiaqiang Yan¹  Qianqian Jia¹  Shengyu Zhang¹ 

[1] State Key Laboratory of Bio-Based Material and Green Papermaking/Key Laboratory of Pulp & Paper Science and Technology of Education Ministry of China, Qilu University of Technology, Jinan 250353, China;

关键词: pre-hydrolysis liquor;    BiOCl/BiOBr;    lignin;    photocatalysis;   

DOI  :  10.3390/nano11112836

来源: DOAJ

【 摘 要 】

The presence of lignin hampers the utilization of hemicelluloses in the pre-hydrolysis liquor (PHL) from the kraft-based dissolving pulp production process. In this paper, a novel process for removing lignin from PHL was proposed by effectively recycling catalysts of BiOCl/BiOBr. During the whole process, BiOCl and BiOBr were not only adsorbents for removing lignin, but also photocatalysts for degrading lignin. The results showed that BiOCl and BiOBr treatments caused 36.3% and 33.9% lignin removal, respectively, at the optimized conditions, and the losses of hemicellulose-derived saccharides (HDS) were both 0.1%. The catalysts could be regenerated by simple photocatalytic treatment and obtain considerable CO and CO₂. After 15 h of illumination, 49.9 μmol CO and 553.0 μmol CO₂ were produced by BiOCl, and 38.7 μmol CO and 484.3 μmol CO₂ were produced by BiOBr. Therefore, both BiOCl and BiOBr exhibit excellent adsorption and photocatalytic properties for lignin removal from pre-hydrolysis.

【 授权许可】

Unknown