Catalytic pyrolysis of larch sawdust for phenol-rich bio-oil using different catalysts

RENEWABLE ENERGY

卷:121

Article

Wang, Wenliang¹  Li, Xinping¹  Ye, Dan³  Cai, LiPing²  Sheldon, Q.² 

[1] Shaanxi Univ Sci & Technol, Coll Bioresources Chem & Mat Engn, Shaanxi Prov Key Lab Papermaking Technol & Specia, Xian 710021, Shaanxi, Peoples R China

[2] Univ North Texas, Mech & Energy Engn Dept, 3940 N Elm, Denton, TX 72076 USA

[3] Zhe Jiang Furniture & Hardware Res Inst, Hangzhou 311112, Zhejiang, Peoples R China

关键词: Bio-oil;    Total phenolic compounds;    Catalytic pyrolysis;    Catalyst Larch sawdust;   

DOI  :  10.1016/j.renene.2018.01.018

来源: Elsevier

【 摘 要 】

Different kinds of catalysts have a great influence on the characteristics and products of the biomass catalytic pyrolysis. Catalysts of Cu/C, Pd/C, Pd-Ag and H-Zeolites socony mobil #5 (HZSM-5) were selected and characterized by the X-ray diffraction (XRD) and field-emission scanning electron microscope (FE-SEM). Decomposition behaviors of the larch catalytic pyrolysis were studied by the ther-mogravimetric analyzer (TG). The total carboxylic acids (TCAs) and total phenolic compounds (TPCs) in bio-oil were determined using the non-aqueous potentiometric titration method. The chemical distribution of bio-oil was investigated by the gas chromatography/mass spectrometry (GC/MS). Results showed that the temperature of the maximum weight loss rate of larch was decreased by adding these four catalysts. The carbon residue rate was increased by using HZSM-5. The content of GC-detected phenols increased from 25.28% to 35.11% (area) by adding Pd/C. However, TCAs in bio-oil were decreased sharply with Pd-Ag and Pd/C. HZSM-5 promoted the formation of phenols and enhanced TPCs in bio-oils (26.56 wt%), which increased by approximately 35% compared to that from the non-catalytic pyrolysis process. This phenol-rich bio-oil can be used to replace the traditional phenol for the manufacturing of high-value biomaterials. (C) 2018 Elsevier Ltd. All rights reserved.

【 授权许可】

Free