Mechanism of Magnetic Nanoparticle Enhanced Microwave Pyrolysis for Oily Sludge

Hongyuan Qi, Huayi Jiang, Yanzhen You, Juan Hu, Yulong Wang, Zhe Wu and Hongxin Qi
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Hongyuan Qi: College of Petroleum Engineering, Xi’an Shiyou University, Xi’an 710065, China
Huayi Jiang: College of Petroleum Engineering, Xi’an Shiyou University, Xi’an 710065, China
Yanzhen You: College of Petroleum Engineering, Xi’an Shiyou University, Xi’an 710065, China
Juan Hu: College of Petroleum Engineering, Xi’an Shiyou University, Xi’an 710065, China
Yulong Wang: College of Petroleum Engineering, Xi’an Shiyou University, Xi’an 710065, China
Zhe Wu: College of Petroleum Engineering, 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

Energies, 2022, vol. 15, issue 4, 1-22

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.

Keywords: magnetic nanoparticles; oily sludge; microwave pyrolysis; thermogravimetric analysis; kinetics simulation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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