Coke formation on activated carbon during catalytic upgrading of coal pyrolysis volatiles

JIN Xin; WANG Qian; LI Xiao-rong; LI Ting; WANG Mei-jun; KONG Jiao; YAN Lun-jing; CHANG Li-ping; WANG Jian-cheng; BAO Wei-ren

doi:10.1016/S1872-5813(21)60047-6

Volume 49 Issue 5

May 2021

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Article Navigation > Journal of Fuel Chemistry and Technology > 2021 > 49(5): 609-616

JIN Xin, WANG Qian, LI Xiao-rong, LI Ting, WANG Mei-jun, KONG Jiao, YAN Lun-jing, CHANG Li-ping, WANG Jian-cheng, BAO Wei-ren. Coke formation on activated carbon during catalytic upgrading of coal pyrolysis volatiles[J]. Journal of Fuel Chemistry and Technology, 2021, 49(5): 609-616. doi: 10.1016/S1872-5813(21)60047-6

Citation:

JIN Xin, WANG Qian, LI Xiao-rong, LI Ting, WANG Mei-jun, KONG Jiao, YAN Lun-jing, CHANG Li-ping, WANG Jian-cheng, BAO Wei-ren. Coke formation on activated carbon during catalytic upgrading of coal pyrolysis volatiles[J]. Journal of Fuel Chemistry and Technology, 2021, 49(5): 609-616. doi: 10.1016/S1872-5813(21)60047-6

Citation:

JIN Xin, WANG Qian, LI Xiao-rong, LI Ting, WANG Mei-jun, KONG Jiao, YAN Lun-jing, CHANG Li-ping, WANG Jian-cheng, BAO Wei-ren. Coke formation on activated carbon during catalytic upgrading of coal pyrolysis volatiles[J]. Journal of Fuel Chemistry and Technology, 2021, 49(5): 609-616. doi: 10.1016/S1872-5813(21)60047-6

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Coke formation on activated carbon during catalytic upgrading of coal pyrolysis volatiles

doi: 10.1016/S1872-5813(21)60047-6

JIN Xin^{1, 2
,},
WANG Qian^{1, 2},
LI Xiao-rong^{1, 2},
LI Ting^{1, 2},
WANG Mei-jun^{1, 2
,
,},
KONG Jiao^{1, 2},
YAN Lun-jing^{1, 2},
CHANG Li-ping^{1, 2
,
,},
WANG Jian-cheng^{1, 2},
BAO Wei-ren^{1, 2}

1.
State Key Laboratory of Clean and Efficient Coal Utilization, Taiyuan University of Technology, Taiyuan 030024, China
2.
Key Laboratory of Coal Science and Technology, Ministry of Education , Taiyuan University of Technology, Taiyuan 030024, China

Funds: The project was supported by the National Key Research and Development Program of China (2016YFB0600302) and the National Natural Science Foundation of China (22078224)

Received Date: 2020-12-31
Rev Recd Date: 2021-01-29

Available Online: 2021-03-30

Publish Date: 2021-05-28

Abstract

Abstract

The content of heavy pitch in tar generated from coal pyrolysis is high. To improve the quality of tar, catalysts are applied for adjusting the reaction of volatiles during coal pyrolysis. However, catalysts are easy to deactivate due to coke deposition. In this study, coke amount on activated carbon catalysts during catalytic upgrading of coal pyrolysis volatiles was investigated in the downer-bed reactor. The process of coke formation was studied at different feed time (30, 60 and 100 min) of coal. Results show that a great amount of coke is generated on the activated carbons. With the increase of feed time, the amount of coke on activated carbon increases, while the rate of coke formation decreases, thus decreasing the coke yield based on dry coal. The specific surface area and catalytic cracking activity of the activated carbon decrease with the increase of coke amount. Hence, the yields of tar and pitch increase with the increase of feed time. The relative content of oxygen-containing compounds in the tar increases with the increase of feed time, which indicates that the cleavage of weak chemical bond C−O is suppressed. That may result in a decrease in the rate of coke formation.
- coal pyrolysis,
- volatiles,
- activated carbon catalyst,
- coke,
- tar

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References(23)

References

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