TY - JOUR
T1 - Effect of hydrothermal process on the pyrolysis of oily sludge
T2 - Characterization and analysis of pyrolysis products
AU - Duan, Yihang
AU - Ning, Yongan
AU - Gao, Ningbo
AU - Quan, Cui
AU - Grammelis, Panagiotis
AU - Boutikos, Panagiotis
N1 - Publisher Copyright:
© 2022 Elsevier Ltd
PY - 2023/4/15
Y1 - 2023/4/15
N2 - In this paper, the effect of the pretreatment method combined with hydrothermal treatment and in situ mechanical compression (HT-MC) on the pyrolysis characteristics of oily sludge (OS) was investigated. The results of the thermal analysis showed that the temperature range in different pyrolysis stage intervals shifted to a lower level and the weight loss rate decreased significantly after HT-MC. Isoconversional methods were employed with an estimated apparent activation energy of 92.66 –198.21 kJ·mol−1 for the pyrolysis of OS after HT-MC. As the hydrothermal temperature increased to 240 °C, the yield of char increased from 80.44 to 86.08 wt%, and the yield of oil decreased from 16.03 to 11.23 wt%. Compared to the raw material, the gas products from the pyrolysis of OS after HT-MC had a higher H2 concentration and yield. The analysis results of GC-MC showed that, compared with the pyrolysis oil obtained by direct pyrolysis, the content of olefins in pyrolysis oil obtained in pyrolysis of OS after hydrothermal treatment increased from 0.86 % to 5.73 %. Furthermore, the relative content of alkanes in pyrolysis oil increased from 76.12 % to 87.40 % with the rise of hydrothermal temperature from 160 to 240 °C.
AB - In this paper, the effect of the pretreatment method combined with hydrothermal treatment and in situ mechanical compression (HT-MC) on the pyrolysis characteristics of oily sludge (OS) was investigated. The results of the thermal analysis showed that the temperature range in different pyrolysis stage intervals shifted to a lower level and the weight loss rate decreased significantly after HT-MC. Isoconversional methods were employed with an estimated apparent activation energy of 92.66 –198.21 kJ·mol−1 for the pyrolysis of OS after HT-MC. As the hydrothermal temperature increased to 240 °C, the yield of char increased from 80.44 to 86.08 wt%, and the yield of oil decreased from 16.03 to 11.23 wt%. Compared to the raw material, the gas products from the pyrolysis of OS after HT-MC had a higher H2 concentration and yield. The analysis results of GC-MC showed that, compared with the pyrolysis oil obtained by direct pyrolysis, the content of olefins in pyrolysis oil obtained in pyrolysis of OS after hydrothermal treatment increased from 0.86 % to 5.73 %. Furthermore, the relative content of alkanes in pyrolysis oil increased from 76.12 % to 87.40 % with the rise of hydrothermal temperature from 160 to 240 °C.
KW - Char
KW - Hydrothermal
KW - Oily sludge
KW - Pyrolysis
KW - Pyrolysis oil
UR - https://www.scopus.com/pages/publications/85145856316
U2 - 10.1016/j.fuel.2022.127347
DO - 10.1016/j.fuel.2022.127347
M3 - 文章
AN - SCOPUS:85145856316
SN - 0016-2361
VL - 338
JO - Fuel
JF - Fuel
M1 - 127347
ER -