Petroleum coke conversion behavior in catalyst-assisted chemical looping combustion

doi:10.1016/j.cjche.2020.06.012

Chinese Journal of Chemical Engineering ›› 2020, Vol. 28 ›› Issue (9): 2417-2424.DOI: 10.1016/j.cjche.2020.06.012

• Energy, Resources and Environmental Technology • Previous Articles Next Articles

Petroleum coke conversion behavior in catalyst-assisted chemical looping combustion

Xianyu Liu¹, Huijun Ge¹, Shiwei Ma¹, Shangyi Yin¹, Ping Lu¹, Laihong Shen², Hongcun Bai³, Wei Wang⁴, Tao Song¹

1 School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 210023, China;
2 Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096, China;
3 State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, China;
4 SUMEC Complete Equip. & Eng. Co., Ltd, Nanjing, 210018, China

Received:2020-04-06 Revised:2020-05-14 Online:2020-10-21 Published:2020-09-28
Contact: Tao Song
Supported by:
This work was supported by the National Natural Foundation of China (51906113), Natural Science Foundation of Jiangsu province (BK20190707), Key Research and Development (R&D) Projects of Shanxi Province (201903D121031) and Foundation of State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering (Grant No. 2020-KF-05).

Petroleum coke conversion behavior in catalyst-assisted chemical looping combustion

Xianyu Liu¹, Huijun Ge¹, Shiwei Ma¹, Shangyi Yin¹, Ping Lu¹, Laihong Shen², Hongcun Bai³, Wei Wang⁴, Tao Song¹

1 School of Energy and Mechanical Engineering, Nanjing Normal University, Nanjing 210023, China;
2 Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096, China;
3 State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, China;
4 SUMEC Complete Equip. & Eng. Co., Ltd, Nanjing, 210018, China

通讯作者: Tao Song
基金资助:
This work was supported by the National Natural Foundation of China (51906113), Natural Science Foundation of Jiangsu province (BK20190707), Key Research and Development (R&D) Projects of Shanxi Province (201903D121031) and Foundation of State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering (Grant No. 2020-KF-05).

Abstract

Abstract: Efficiently using petroleum coke as fuel and reducing carbon emission meanwhile have become attractive in oil processing industry. The paper is focused on the application of Chemical Looping Combustion (CLC) with petroleum coke, with the purpose of investigating its combustion performance and effects of potassium. Some experiments were performed in a laboratory scale fluidized bed facility with a natural manganese-based oxygen carrier. Experimental results indicated that the coke conversion is very sensitive to reaction temperature. The present natural manganese-based oxygen carrier decorated by K has little effect on the improvement of coke conversion. XRD, SEM-EDX, and H₂-TPR were adopted to characterize the reacted oxygen carrier samples. After being decorated by K, the oxygen carrier's capacity of transferring oxygen was decreased. A calcination temperature above the melting point of K₂CO₃ (891 °C) shows better oxygen transfer reactivity in comparison to the one calcined at a lower temperature. The natural oxygen carrier used in the work has a high content of Si, which can easily react with K to form K(FeSi₂O₆). Further, irrespective of reaction temperature, the coke conversion can be significantly enhanced by decorating the coke with K, with a demonstration of remarkably shorter reaction time, faster average coke gasification rate and higher average carbon conversion rate.

Key words: Chemical looping combustion, Oxygen carrier, Catalyst, Coke

摘要： Efficiently using petroleum coke as fuel and reducing carbon emission meanwhile have become attractive in oil processing industry. The paper is focused on the application of Chemical Looping Combustion (CLC) with petroleum coke, with the purpose of investigating its combustion performance and effects of potassium. Some experiments were performed in a laboratory scale fluidized bed facility with a natural manganese-based oxygen carrier. Experimental results indicated that the coke conversion is very sensitive to reaction temperature. The present natural manganese-based oxygen carrier decorated by K has little effect on the improvement of coke conversion. XRD, SEM-EDX, and H₂-TPR were adopted to characterize the reacted oxygen carrier samples. After being decorated by K, the oxygen carrier's capacity of transferring oxygen was decreased. A calcination temperature above the melting point of K₂CO₃ (891 °C) shows better oxygen transfer reactivity in comparison to the one calcined at a lower temperature. The natural oxygen carrier used in the work has a high content of Si, which can easily react with K to form K(FeSi₂O₆). Further, irrespective of reaction temperature, the coke conversion can be significantly enhanced by decorating the coke with K, with a demonstration of remarkably shorter reaction time, faster average coke gasification rate and higher average carbon conversion rate.

关键词: Chemical looping combustion, Oxygen carrier, Catalyst, Coke

Xianyu Liu, Huijun Ge, Shiwei Ma, Shangyi Yin, Ping Lu, Laihong Shen, Hongcun Bai, Wei Wang, Tao Song. Petroleum coke conversion behavior in catalyst-assisted chemical looping combustion[J]. Chinese Journal of Chemical Engineering, 2020, 28(9): 2417-2424.

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Petroleum coke conversion behavior in catalyst-assisted chemical looping combustion

Petroleum coke conversion behavior in catalyst-assisted chemical looping combustion

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