Research output: Contribution to journal › Article › peer-review
Effect of temperature on the hydrotreatment of sewage sludge-derived pyrolysis oil and behavior of Ni-based catalyst. / Alekseeva, Maria V.; Bulavchenko, Olga A.; Saraev, Andrey A. et al.
In: Catalysts, Vol. 10, No. 11, 1273, 11.2020, p. 1-27.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Effect of temperature on the hydrotreatment of sewage sludge-derived pyrolysis oil and behavior of Ni-based catalyst
AU - Alekseeva, Maria V.
AU - Bulavchenko, Olga A.
AU - Saraev, Andrey A.
AU - Kremneva, Anna M.
AU - Shashkov, Mikhail V.
AU - Zaikina, Olesya O.
AU - Gulyaeva, Yuliya K.
AU - Grachev, Andrey N.
AU - Kikhtyanin, Oleg
AU - Kubička, David
AU - Yakovlev, Vadim A.
PY - 2020/11
Y1 - 2020/11
N2 - The high-energy potential of wastewater sewage sludge (SS) produced in large amounts around the world makes it an attractive feedstock for fuels and energy sectors. Thermochemical valorization relying on pyrolysis of SS followed by hydrotreatment of pyrolysis oil (Py-SS) might even allow the integration of SS into existing oil refineries. In the present study, catalytic hydrotreatment of Py-SS was performed over a NiCuMo-P-SiO2 catalyst in a batch reactor at temperatures in the range of 200–390◦C. Due to sulfur presence in the feed, the increasing reaction temperature induced in situ transformation of metallic Ni into Ni3S2 in the catalyst. In contrast, the Ni3P active phase possessed remarkable stability even at the harshest reaction conditions. The oxygen content in the reaction products was decreased by 59%, while up to 52% of N and 89% of S were removed at 390◦C. The content of free fatty acids was greatly reduced by their conversion to n-alkanes, while the larger amount of volatile aromatics was generated from high molecular mass compounds. The quality of oil-derived products greatly changed at elevated temperatures, providing strong evidence of effective upgrading via decarboxy(ny)lation, hydrogenation, and hydrocracking transformations.
AB - The high-energy potential of wastewater sewage sludge (SS) produced in large amounts around the world makes it an attractive feedstock for fuels and energy sectors. Thermochemical valorization relying on pyrolysis of SS followed by hydrotreatment of pyrolysis oil (Py-SS) might even allow the integration of SS into existing oil refineries. In the present study, catalytic hydrotreatment of Py-SS was performed over a NiCuMo-P-SiO2 catalyst in a batch reactor at temperatures in the range of 200–390◦C. Due to sulfur presence in the feed, the increasing reaction temperature induced in situ transformation of metallic Ni into Ni3S2 in the catalyst. In contrast, the Ni3P active phase possessed remarkable stability even at the harshest reaction conditions. The oxygen content in the reaction products was decreased by 59%, while up to 52% of N and 89% of S were removed at 390◦C. The content of free fatty acids was greatly reduced by their conversion to n-alkanes, while the larger amount of volatile aromatics was generated from high molecular mass compounds. The quality of oil-derived products greatly changed at elevated temperatures, providing strong evidence of effective upgrading via decarboxy(ny)lation, hydrogenation, and hydrocracking transformations.
KW - Hydrotreatment
KW - Nickel-phosphide catalyst
KW - Pyrolysis oil
KW - Sewage sludge
KW - CRUDE BIO-OIL
KW - ENERGY
KW - MOLYBDENUM
KW - HYDROTHERMAL LIQUEFACTION
KW - sewage sludge
KW - SOL-GEL CATALYSTS
KW - WASTE
KW - BIOMASS
KW - GASIFICATION
KW - pyrolysis oil
KW - XPS
KW - OXIDES
KW - hydrotreatment
KW - nickel-phosphide catalyst
UR - http://www.scopus.com/inward/record.url?scp=85095730954&partnerID=8YFLogxK
U2 - 10.3390/catal10111273
DO - 10.3390/catal10111273
M3 - Article
AN - SCOPUS:85095730954
VL - 10
SP - 1
EP - 27
JO - Catalysts
JF - Catalysts
SN - 2073-4344
IS - 11
M1 - 1273
ER -
ID: 25863341