首页|Importance of oxygen-containing functionalities and pore structures of biochar in catalyzing pyrolysis of homologous poplar

Importance of oxygen-containing functionalities and pore structures of biochar in catalyzing pyrolysis of homologous poplar

扫码查看
Biochar and bio-oil are produced simultaneously in one pyrolysis process,and they inevitably contact and may interact,influencing the composition of bio-oil and modifying the structure of biochar.In this sense,biochar is an inherent catalyst for pyrolysis.In this study,in order to investigate the influence of functionalities and pore structures of biochar on its capability for catalyzing the conversion of homol-ogous volatiles in bio-oil,three char catalysts(600C,800C,and 800AC)produced via pyrolysis of poplar wood at 600 or 800 ℃ or activated at 800 ℃,were used for catalyzing pyrolysis of homologous poplar wood at 600 ℃,respectively.The results indicated that the 600C catalyst was more active than 800C and 800AC for catalyzing cracking of volatiles to form more gas(yield increase by 40.2%)and aromatization of volatiles to form more light or heavy phenolics,due to its abundant oxygen-containing functionalities acting as active sites.The developed pores of the 800AC showed no such catalytic effect but could trap some volatiles and allow their further conversion via sufficient aromatization.Nevertheless,the inter-action with the volatiles consumed oxygen on 600C(decrease by 50%),enhancing the aromatic degree and increasing thermal stability.The dominance of deposition of carbonaceous material of a very aro-matic nature over 800C and 800AC resulted in net weight gain and blocked micropores but formed additional macropores.The in situ diffuse reflectance infrared Fourier transform spectroscopy characterization of the catalytic pyrolysis indicated superior activity of 600C for removal of-OH,while conversion of the intermediates bearing C=O was enhanced over all the char catalysts.

Poplar woodCatalytic pyrolysisChar catalystVolatile-char interactionBio-oil

Li Qiu、Chao Li、Shu Zhang、Shuang Wang、Bin Li、Zhenhua Cui、Yonggui Tang、Obid Tursunov、Xun Hu

展开 >

School of Material Science and Engineering,University of Jinan,Jinan 250022,China

Joint International Research Laboratory of Biomass Energy and Materials,College of Materials Science and Engineering,Nanjing Forestry University,Nanjing 210037,China

School of Energy and Power Engineering,Jiangsu University,Zhenjiang 212013,China

Shandong BASAN Graphite New Material Plant,Zibo 255311,China

Department of Power Supply and Renewable Energy Sources,National Research University TIIAME,Tashkent 100000,Uzbekistan

展开 >

国家自然科学基金Program for Taishan Scholars of the Shandong Province Government

51876080

2024

中国化学工程学报(英文版)
中国化工学会

中国化学工程学报(英文版)

CSTPCDEI
影响因子:0.818
ISSN:1004-9541
年,卷(期):2024.65(1)
  • 53