Study on vacuum pyrolysis of coffee industrial residue for bio-oil production

2nd International Conference on Advances in Energy Resources and Environment Engineering

能源学;生态环境科学

Chen, Nanwei^1,2 ; Ren, Jie^1 ; Ye, Ziwei^1 ; Xu, Qizhi^1 ; Liu, Jingyong^1 ; Sun, Shuiyu^1,2

School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou

510006, China^1

Guangdong Polytechnic of Environmental Protection Engineering, Foshan

528216, China^2

关键词: Industrial residues;    Non-condensable gas;    Octadecanoic acids;    Pyrolysis products;    Pyrolysis temperature;    Thermo-gravimetric;    Vacuum pyrolysis;    Volatile contents;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/59/1/012065/pdf
DOI  :  10.1088/1755-1315/59/1/012065

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Coffee industrial residue (CIR) is a biomass with high volatile content (64.94 wt.%) and heating value (21.3 MJ•kg-1). This study was carried out to investigate the pyrolysis condition and products of CIR using thermogravimetric analyser (TGA) and vacuum tube furnace. The influence of pyrolysis temperature, time, pressure and heating rate on the yield of pyrolysis products were discussed. There was an optimal pyrolysis condition: CIR was heated from normal temperature to 400 °C for 60 min, with 10 °C•min-1heating rate and a pressure of 30 kPaabs. In this condition, the yields of bio-oil, char and non-condensable gas were 42.29, 33.14 and 24.57 wt.%, respectively. The bio-oil contained palmitic acid (47.48 wt.%), oleic acid (17.45 wt.%), linoleic acid (11.34 wt.%), octadecanoic acid (7.62 wt.%) and caffeine (5.18 wt.%).