镍基和均相酸催化废弃木质素的溶剂热降解

doi:10.3969/j.issn.0253-2417.2015.01.020

林产化学与工业 ›› 2015, Vol. 35 ›› Issue (1): 126-132.doi: 10.3969/j.issn.0253-2417.2015.01.020

镍基和均相酸催化废弃木质素的溶剂热降解

黄梅^1,2, 罗嘉¹, 方真¹

1. 中国科学院西双版纳热带植物园;热带植物资源可持续利用重点实验室; 生物能源组, 云南昆明 650223;
2. 中国科学院大学, 北京 100049

收稿日期:2013-11-06 出版日期:2015-02-25 发布日期:2015-03-05
通讯作者: 罗嘉,副研究员,研究领域为生物质化学转化;E-mail:luojia@xtbg.ac.cn。 E-mail:luojia@xtbg.ac.cn
作者简介:黄梅(1989-),女,云南罗平人,硕士生,主要从事木质素液化和生物质炭的研究
基金资助:
中国科学院"一三五"专项(XTBG-T02);中国科学院科研装备研制项目(YZ201260)

Solvent-thermal Degradation of Waste Lignin over Ni-Based Catalysts in the Presence of Homogeneous Acids

HUANG Mei^{1 2}, LUO Jia¹, FANG Zhen¹

1. Key Laboratory of Tropical Plant Resources and Sustainable Use, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming 650223, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China

Received:2013-11-06 Online:2015-02-25 Published:2015-03-05

摘要/Abstract

摘要： 采用热化学方法降解木质素生成单体和低聚体产物。通过改变溶剂和使用均相酸、镍基催化剂,促进木质素热降解,提高油收率,改善油品质。结果表明:在密封条件下,250℃反应1 h甲醇和水协同促进了木质素降解。水/甲醇/甲酸溶剂中反应的残渣率降低至14.9%,油收率提高至44.1%。添加均相酸HCl、H₃PO₄和非均相催化剂Ni、Ni/SiO₂-Al₂O₃,促进了原料裂解,抑制了产物缩合,反应生成单体、二聚体为主的油产物。Ni/SiO₂-Al₂O₃催化促进了不饱和脂肪烃的重整和含氧官能团的减少,油收率显著下降。Ni催化则能够同时获得更好的油品质和较高的油收率(41.7%)。

关键词: 木质素, 热化学降解, 均相酸, 镍基催化剂

Abstract: Lignin was degraded to monomers and oligomers by thermochemical method. The yield and quality of degraded oil were different under different amount of solvents, homogeneous acids, and Ni-based catalysts. The results showed that the co-solvent of methanol and water promote the degradation of lignin. The residue yield decreased to 14.9% with the oil product yield increased to 44.1% in water/methanol/formic acid solvent. The addition of homogeneous acids (HCl and H₃PO₄) and heterogeneous catalysts (Ni and Ni/SiAl) not only improves the degradation of raw material, but also inhibits the condensation of degraded products. The obtained oils mainly contain monomers and oligomers. Ni/SiAl catalyzes the reforming of unsaturated aliphatic hydrocarbons and reduces oxygenic functional groups at the same time. This significantly decreases the yield of oil. Good oil quality with considerable oil yield (41.7%) was obtained under Ni catalyst.

Key words: lignin, thermochemical degradation, homogeneous acids, Ni-based catalysts

中图分类号:

TQ351.013

黄梅, 罗嘉, 方真. 镍基和均相酸催化废弃木质素的溶剂热降解[J]. 林产化学与工业, 2015, 35(1): 126-132.

HUANG Mei, LUO Jia, FANG Zhen. Solvent-thermal Degradation of Waste Lignin over Ni-Based Catalysts in the Presence of Homogeneous Acids[J]. Chemistry and Industry of Forest Products, 2015, 35(1): 126-132.

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镍基和均相酸催化废弃木质素的溶剂热降解

Solvent-thermal Degradation of Waste Lignin over Ni-Based Catalysts in the Presence of Homogeneous Acids

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