Pyrolysis performance and kinetic analysis of oily sludge

Wang, Ziyi; Gong, Zhiqiang; Wang, Zhenbo; Li, Xiaoyü; Liu, Jixiang; Tang, Chen; Chu, Zhiwei

doi:10.1007/s10973-021-10858-4

Cited by 11 publications

(5 citation statements)

References 18 publications

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“…14,15 Li et al 16 studied the effect of lime residue on biomass pyrolysis kinetics and thermodynamics by KAS method, and verified the accuracy and practicability of KAS method. Wang et al 17 calculated activation energy range and the average activation energy of oily sludge by three methods, including of KAS, FWO, and Starink methods, and all results showed high similarity. Miao et al 18 calculated the activation energy of oily field sludge pyrolysis by CR and FWO methods, and the results are basically consistent.…”

Section: Introductionmentioning

confidence: 99%

“…Wang et al. 17 calculated activation energy range and the average activation energy of oily sludge by three methods, including of KAS, FWO, and Starink methods, and all results showed high similarity. Miao et al 18 calculated the activation energy of oily field sludge pyrolysis by CR and FWO methods, and the results are basically consistent.…”

Section: Introductionmentioning

confidence: 99%

“…Flynn–Wall–Ozawa (FWO), Kissinger–Akahira–Sunose (KAS), Coats–Redfern (CR), and Starink et al are significant methods for determining kinetic and thermodynamic parameters. , Li et al studied the effect of lime residue on biomass pyrolysis kinetics and thermodynamics by KAS method, and verified the accuracy and practicability of KAS method. Wang et al . calculated activation energy range and the average activation energy of oily sludge by three methods, including of KAS, FWO, and Starink methods, and all results showed high similarity.…”

Section: Introductionmentioning

confidence: 99%

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Copyrolysis and Cocombustion Performance of Karamay Oily Sludge and Zhundong Subbituminous Coal

Feng

Liu

et al. 2022

ACS Omega

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Karamay oily sludge (KOS), Zhundong subbituminous coal (ZSBC), and their equal mass mixture (M KOS/ZSBC) were selected as the research samples, and composition characteristics and pyrolysis performance of KOS, ZSBC, and its mixture were investigated by means of various analytical methods. Results showed that yields of fixed carbon and volatile matter from ZSBC are higher than those from KOS, and the content of moisture in ZSBC is also higher; most of the components in KOS are inorganic minerals, with the ash yield of 71.4%, and the fixed carbon yield of nearly 0. According to Fourier transform infrared spectrometer (FTIR) analysis, the types of functional groups in KOS and ZSBC are basically the same, while the contents of which are different. Thermogravimetry-differential thermogravimetry (TG-DTG) analysis indicated that the mass loss of ZSBC, KOS, and M KOS/ZSBC are 41.1%, 25.7%, and 32.8% with a heating temperature up to 990 °C, respectively. By analyzing the theoretical pyrolysis and combustion TG-DTG profiles of M KOS/ZSBC and the measured composition of the flue gas produced during the tested processes, it is found that the mixture of oily sludge and coal helps generate remarkable combustible gases with significantly reduced CO2, indicating that there is an effective “synergistic effect” between KOS and ZSBC. Based on the Coats–Redfern (CR) model, in the main pyrolysis temperature range, when the reaction order is selected as 1, the kinetic fitting effect of pyrolysis and combustion profiles for ZSBC is better, with the correlation coefficient R 2 > 0.98. While for KOS and M KOS/ZSBC, in N2 atmosphere, the fitting effect is satisfactory as the reaction order is set to 5, in air atmosphere, the better fitting effect is considered that reaction order is selected as 1.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Copyrolysis and Cocombustion Performance of Karamay Oily Sludge and Zhundong Subbituminous Coal

Feng

Liu

et al. 2022

ACS Omega

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“…Cheng et al 21 investigated the pyrolysis behavior of three different oily sludge types by using thermogravimetric (TG) and differential TG (DTG). Wang et al 22 conducted a thermal treatment of oily sludge and investigated the pyrolytic behavior of oily sludge by using the TG method. Unfortunately, because of the rapid chemical reactions during pyrolysis, it is difficult to obtain intermediate products only by experimental techniques, which will affect the comprehensive exploration of the pyrolysis mechanism.…”

Section: Introductionmentioning

confidence: 99%

Analysis of gas product changes during pyrolysis of oily sludge based on density functional theory calculation

Wen¹,

Cheng

Liu

et al. 2023

Asia-Pacific J Chem Eng

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Oily sludge is a kind of harmful solid waste produced by the petroleum industry. It is the key point of research to understand the mechanism of gas product changes during the pyrolysis process. This study combined density functional theory (DFT) calculation with a pyrolysis experiment to explore the changes in pyrolytic gas products from oily sludge. The results of thermogravimetric–mass spectrometry (TG–MS) and gas chromatography–mass spectrometry (GC–MS) showed that the gas products below 400°C were dominated by long‐chain hydrocarbons, but with the increase of the treatment temperature, the long‐chain hydrocarbons will decrease. The results of kinetics and thermodynamics showed that there were five stages of pyrolysis of oily sludge, and the values of E, ΔH, and ΔG were increased with the increase of pyrolysis temperature. The DFT calculation revealed that there were delocalized π‐electrons at the fracture‐prone sites, and the electrons on the functional groups of the molecule were more easily excited. The results can provide ideas for the pyrolysis mechanism of oily sludge and theoretical support for the optimization of the pyrolysis process.

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“…OS contains numerous petroleum-type organic compounds and heavy metals. Therefore, improper disposal will cause serious pollution to the surrounding environment [ 12 ]. Moreover, OS has been listed as a hazardous solid waste industry by the government [ 13 , 14 , 15 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Oily Sludge Treatment with Molten Blast Furnace Slag on the Mineral Phase Reconstruction of Water-Quenched Slag Properties

Qin

Zhang

et al. 2021

Materials

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Blast furnace slag, which is the main by-product of the ironmaking process discharged at 1450 °C, contains high-quality sensible heat, while oily sludge is the main solid waste produced in the process of gas exploration, storage, and transportation. The energy and resource utilization of blast furnace slag is complementary to the environmentally friendly treatment of oily sludge, which has provided a new idea for the multi-factor synergistic cycle and energy transformation of the two wastes. The pyrolysis of the oily sludge with the molten blast furnace slag was conducted in the current paper. Results showed that the oily sludge was rapidly pyrolyzed, and the heavy metal elements in the oily sludge were solidified. The solidification rate of the heavy metals exceeds 90%, except for vanadium. The reconstituted water-quenched blast furnace slag still has good activity, and it will not affect the further use of the slag after pyrolysis (BFS-P).

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Pyrolysis performance and kinetic analysis of oily sludge

Cited by 11 publications

References 18 publications

Copyrolysis and Cocombustion Performance of Karamay Oily Sludge and Zhundong Subbituminous Coal

Copyrolysis and Cocombustion Performance of Karamay Oily Sludge and Zhundong Subbituminous Coal

Analysis of gas product changes during pyrolysis of oily sludge based on density functional theory calculation

Effect of Oily Sludge Treatment with Molten Blast Furnace Slag on the Mineral Phase Reconstruction of Water-Quenched Slag Properties

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