Catalytic ketonization of levoglucosan over nano-CeO2 for production of hydrocarbon precursors

Hao Zhou, Muhammad Asif Akhtar, Yiling Wan, Kuan Ding, Roger Ruan, Hong Zhang, Shu Zhang

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Abstract

As one of the major products from cellulose pyrolysis, levoglucosan (LG) is highly oxygenated and stubborn, causing serious problems to bio-oil utilization. In this study, catalytic ketonization of LG over nano-CeO2 was performed in a pyrolyzer-gas chromatography/ mass spectrometry (PY-GC/MS) system to prepare hydrocarbon precursors (principally ketones). Nano-CeO2 has been proven effective to convert LG into ketones, with the highest selectivity (71.2 %) obtained when CeO2 to LG ratio was 15:1 (mm3: mg) at 700 °C. When 5% ZrO2 was loaded on CeO2 (5% Zr/CeO2), the selectivity of ketones further increased to 76.0 %, and that of linear compounds in all the ketone products reached 53.9 %. Results from catalyst characterization revealed that 5% Zr/CeO2 contained an abundance of basic surface sites and redox capacity, thus leading to high ketonization activity. Ketonization of LG possesses significant potential in facilitating the conversion of cellulose into high-quality biofuels in a sustainable way.

Original languageEnglish (US)
Article number104973
JournalJournal of Analytical and Applied Pyrolysis
Volume152
DOIs
StatePublished - Nov 2020

Bibliographical note

Funding Information:
This study is supported by the National Natural Science Foundation of China (Grant No. 51876093 ), and is also partially supported by an internationally collaborative project ( BRICS2019-040 ) under BRICS STI Framework Programme with government funding organizations of Brazil CNPq ( 402849/2019-1 ), Russia RFBR ( 19-58-80016 ), India DST ( CRG/2018/004610 , DST/TDT/TDP-011/2017 ), China MOST ( 2018YFE0183600 ), and South Africa NRF ( BRIC190321424123 ). The authors would like to thank Mr. Dongdong Wang from Hunan University (China) for his assistance in processing the catalyst characterization data.

Funding Information:
This study is supported by the National Natural Science Foundation of China (Grant No. 51876093), and is also partially supported by an internationally collaborative project (BRICS2019-040) under BRICS STI Framework Programme with government funding organizations of Brazil CNPq (402849/2019-1), Russia RFBR (19-58-80016), India DST (CRG/2018/004610, DST/TDT/TDP-011/2017), China MOST (2018YFE0183600), and South Africa NRF (BRIC190321424123). The authors would like to thank Mr. Dongdong Wang from Hunan University (China) for his assistance in processing the catalyst characterization data.

Publisher Copyright:
© 2020 Elsevier B.V.

Keywords

  • Biofuel
  • Catalytic pyrolysis
  • Deoxygenation
  • Ketonization

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