Evolution mechanisms of bio-oil from conventional and nitrogen-rich biomass during photo-thermal pyrolysis

被引：9

作者：

Huang, Dexin ^{[1
]}

Song, Gongxiang ^{[1
]}

Li, Ruochen ^{[2
]}

Han, Hengda ^{[1
]}

He, Limo ^{[1
,3
]}

Jiang, Long ^{[1
,2
]}

Wang, Yi ^{[1
,2
]}

Su, Sheng ^{[1
,2
]}

Hu, Song ^{[1
,2
]}

Xiang, Jun ^{[1
,2
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Energy & Power Engn, State Key Lab Coal Combust, Wuhan 430074, Peoples R China

[2] Huazhong Univ Sci & Technol, China EU Inst Clean & Renewable Energy, Wuhan 430074, Peoples R China

[3] Natl Univ Singapore, Fac Sci, Dept Chem, Singapore 117543, Singapore

来源：

ENERGY | 2023年 / 282卷

基金：

中国国家自然科学基金;

关键词：

Bio-oil; Pyrolysis; Photo-thermal; N-compounds; Heavy components; SOLAR PYROLYSIS; SEWAGE-SLUDGE; FUEL-N; CONVERSION; PRODUCTS; CELLULOSE; ENERGY; HUSK; TAR;

D O I：

10.1016/j.energy.2023.128813

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Photo-thermal (PT) pyrolysis has emerged as a promising technique for efficiently converting biomass into highquality bio-oil. The pyrolysis characteristics of rice straw (RS) and rapeseed cake (RC) were analyzed using a photo-thermal reactor with heating rates of 20, 200 and 500 C-degrees/min and compared with 20 C-degrees/min fixed-bed (FB) pyrolysis at 750 C-degrees. Due to the uneven temperature distribution caused by its limited heating area, fast PT heating significantly increased the presence of high molecular weight components (>650) in the bio-oil. PT pyrolysis of RS exhibited higher phenolic contents compared to FB pyrolysis, whereas RC oil showed enhanced decomposition of fatty acids through ketonization. In terms of N-compounds, PT slow pyrolysis oil contained more nitriles but fewer linear amines/amides than FB, while more cyclic amides were formed under fast PT pyrolysis. Furthermore, the analysis of heavy components revealed that more aromatic compounds with low H/C ratios were produced in fast PT pyrolysis oil. Overall, PT heating exerted dual effects by reducing secondary reactions and synergistically enhancing inner-particle reactions with fast heating. This study provides valuable insights into the mechanism of bio-oil evolution under PT pyrolysis.

引用

页数：10

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[1] Characterization of the bio-oil obtained by fast pyrolysis of sewage sludge in a conical spouted bed reactor [J].