Study on durability of online catalytic upgrading of bio-oil based on Ru/HZSM-5

XIONG Yong-lian; LU Dong-sheng; FAN Yong-sheng; HOU Guang-xi; CHEN Yu-wei

doi:10.1016/S1872-5813(21)60114-7

Volume 49 Issue 12

Dec. 2021

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Article Navigation > Journal of Fuel Chemistry and Technology > 2021 > 49(12): 1851-1859

XIONG Yong-lian, LU Dong-sheng, FAN Yong-sheng, HOU Guang-xi, CHEN Yu-wei. Study on durability of online catalytic upgrading of bio-oil based on Ru/HZSM-5[J]. Journal of Fuel Chemistry and Technology, 2021, 49(12): 1851-1859. doi: 10.1016/S1872-5813(21)60114-7

Citation:

XIONG Yong-lian, LU Dong-sheng, FAN Yong-sheng, HOU Guang-xi, CHEN Yu-wei. Study on durability of online catalytic upgrading of bio-oil based on Ru/HZSM-5[J]. Journal of Fuel Chemistry and Technology, 2021, 49(12): 1851-1859. doi: 10.1016/S1872-5813(21)60114-7

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Study on durability of online catalytic upgrading of bio-oil based on Ru/HZSM-5

doi: 10.1016/S1872-5813(21)60114-7

1.
School of Automotive Engineering, Yancheng Institute of Technology, Yancheng 224051, China
2.
Graduate School of Energy Science, Kyoto University, Kyoto 6068501, Japan

Funds: The project was supported by the National Natural Science Foundation of China (51806186) and the Scientific Research Project for the Introduction Talent of Yancheng Institute of Technology (XJ201708)

Received Date: 2021-04-19
Rev Recd Date: 2021-05-11

Available Online: 2021-06-12

Publish Date: 2021-12-29

Abstract

Abstract

Ru/HZSM-5 was prepared and used to upgrade bio-oil online and the changes of bio-oil yield and physicochemical properties were analyzed through the total quality index ( TQI ). The changes of the chemical compositions of the bio-oils were compared; simultaneously, the coking situation of the catalyst was characterized. The results showed that the yield and physicochemical properties of bio-oil obtained by using fresh catalyst were high, and the TQI increased from 0.15 to 6.45; with the increase of using times, the TQI first increased slightly to 6.68, then decreased rapidly to 1.25, and reduced to only 0.27 after the fourth usage. In the initial stage, a small amount of coking reactions made the strong acid sites partially passivated, which improved the aromatization performance. When the catalyst was used twice, the relative content of hydrocarbons in the bio-oil reached 53.79%, of which the relative content of light aliphatic hydrocarbons was 16.87%, and the relative content of monocyclic aromatic hydrocarbons was 32.65%. After the fourth usage, the relative content of hydrocarbons in the bio-oil was only 9.32%, and the catalyst layer basically lost the upgrading effect, and had adverse effects on pyrolysis vapors such as secondary cracking or polymerization. Before the third usage, the low-temperature pyrolytic coke attached to the catalyst surface was dominant. After the third usage, the low-temperature pyrolytic coke and high-temperature catalytic coke increased significantly, and the catalyst activity decreased sharply. Continuous usage of catalyst slightly increased coke, of which the pyrolytic coke increased mainly.
- bio-oil,
- catalytic upgrading,
- Ru/HZSM-5,
- fuel-grade,
- coking deactivation

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References(28)

References

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