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Mechanism of Magnetic Nanoparticle Enhanced Microwave Pyrolysis for Oily Sludge

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  • Hongyuan Qi

    (College of Petroleum Engineering, Xi’an Shiyou University, Xi’an 710065, China
    Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil & Gas Reservoirs, Xi’an Shiyou University, Xi’an 710065, China)

  • Huayi Jiang

    (College of Petroleum Engineering, Xi’an Shiyou University, Xi’an 710065, China
    Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil & Gas Reservoirs, Xi’an Shiyou University, Xi’an 710065, China)

  • Yanzhen You

    (College of Petroleum Engineering, Xi’an Shiyou University, Xi’an 710065, China
    Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil & Gas Reservoirs, Xi’an Shiyou University, Xi’an 710065, China)

  • Juan Hu

    (College of Petroleum Engineering, Xi’an Shiyou University, Xi’an 710065, China
    Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil & Gas Reservoirs, Xi’an Shiyou University, Xi’an 710065, China)

  • Yulong Wang

    (College of Petroleum Engineering, Xi’an Shiyou University, Xi’an 710065, China
    Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil & Gas Reservoirs, Xi’an Shiyou University, Xi’an 710065, China)

  • Zhe Wu

    (College of Petroleum Engineering, Xi’an Shiyou University, Xi’an 710065, China
    Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil & Gas Reservoirs, Xi’an Shiyou University, Xi’an 710065, China)

  • Hongxin Qi

    (Offshore Oil Production Plant of Shengli Oilfield, SINOPEC (China Petroleum & Chemical Corporation), Dongying 257237, China)

Abstract

In view of the high dielectric constant of magnetic nanoparticles, this paper intends to use it as a new type of microwave absorbing medium to accelerate the microwave pyrolysis process of oily sludge. Microwave thermogravimetric reaction and pyrolysis product staged collection devices were established, respectively. The main stage of pyrolysis process of oily sludge was divided based on the thermogravimetric experiments. Mechanism was studied through the characteristics of pyrolysis products and reaction kinetics simulation. Experimental results showed that the addition of magnetic ZnFe 2 O 4 particle did not change the microwave pyrolysis process of oily sludge and the pyrolysis efficiency could be improved. Pyrolysis process was divided into three stages, rapid heating and water evaporation stage (20~150 °C), light component evaporation stage (150~240 °C) and heavy component cracking stage (240~300 °C). Due to the addition of magnetic ZnFe 2 O 4 particles, the content of C 4 ~C 12 increased by 3.5%, and the content of C 18 + decreased by 4.1%, indicating that more recombinant components participated in the reaction pyrolysis to form light gas components. The kinetic analysis showed that the activation energy of oily sludge decreased by 36.49% and the pre-exponential factor decreased by 91.39% in stage III, indicating that magnetic nanoparticles had good catalytic activity.

Suggested Citation

  • Hongyuan Qi & Huayi Jiang & Yanzhen You & Juan Hu & Yulong Wang & Zhe Wu & Hongxin Qi, 2022. "Mechanism of Magnetic Nanoparticle Enhanced Microwave Pyrolysis for Oily Sludge," Energies, MDPI, vol. 15(4), pages 1-22, February.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:4:p:1254-:d:745157
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    References listed on IDEAS

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    1. Chien Li Lee & Cheng-Hsien Tsai & Chih-Ju G. Jou, 2020. "Energy and Resource Utilization of Refining Industry Oil Sludge by Microwave Treatment," Sustainability, MDPI, vol. 12(17), pages 1-9, August.
    2. Cheng, Shuo & Wang, Yuhua & Fumitake, Takahashi & Kouji, Tokimatsu & Li, Aimin & Kunio, Yoshikawa, 2017. "Effect of steam and oil sludge ash additive on the products of oil sludge pyrolysis," Applied Energy, Elsevier, vol. 185(P1), pages 146-157.
    3. Chiarioni, A. & Reverberi, A.P. & Fabiano, B. & Dovì, V.G., 2006. "An improved model of an ASR pyrolysis reactor for energy recovery," Energy, Elsevier, vol. 31(13), pages 2460-2468.
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    Cited by:

    1. Hao Wang & Xiaogang Li & Jingyi Zhu & Zhaozhong Yang & Jie Zhou & Liangping Yi, 2022. "Numerical Simulation of Oil Shale Pyrolysis under Microwave Irradiation Based on a Three-Dimensional Porous Medium Multiphysics Field Model," Energies, MDPI, vol. 15(9), pages 1-20, April.
    2. Luo, Juan & Ma, Rui & Lin, Junhao & Sun, Shichang & Gong, Guojin & Sun, Jiaman & Chen, Yi & Ma, Ning, 2023. "Review of microwave pyrolysis of sludge to produce high quality biogas: Multi-perspectives process optimization and critical issues proposal," Renewable and Sustainable Energy Reviews, Elsevier, vol. 173(C).

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