1
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Wang Z, Yuan M, Wang J. Energy recoveries and heavy metal migration behaviors of different oily sludges treated by pyrolysis versus solvent extraction. JOURNAL OF HAZARDOUS MATERIALS 2024; 475:134892. [PMID: 38876024 DOI: 10.1016/j.jhazmat.2024.134892] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2024] [Revised: 06/05/2024] [Accepted: 06/10/2024] [Indexed: 06/16/2024]
Abstract
The pyrolysis and trace element mitigation characteristics are investigated by contrast to solvent extraction for four oily sludges, including storage tank bottom sediment (OS-1), scum from a wastewater separator (OS-2), white-clay-adsorbed waste oil (OS-3), and settlings from wastewater treatment (OS-4). Slow pyrolysis at 700 °C generated a single oil phase for OS-1 and separate oil and aqueous phases for OS-2, OS-3 and OS-4. Up to 73.0-88.3 % of the total energy were recovered from OS-1, OS-2 and OS-3 in the oil phase with 19.9-77.1 % oil yield; however, the oil phase from OS-4 accounted for only 13.3 % of the total energy, while the aqueous product accounted for 68.0 % of the total energy. Quantification of 16 trace elements revealed that OS-2 and OS-4 had much higher contents of Cu/Zn/As/Se/Cd/Pb and Ni/Cu/Zn/Se/Cd contents than the average crustal abundances, respectively. Correlations between evaporation and extraction rates indicated that the mitigation behaviors of trace elements were related to their occurrence modes in different oily sludges. Except for Cd, As and Se, all other trace elements were enriched in the pyrolysis residues of the oily sludges. Ni in the pyrolysis residue of OS-4 posed a moderate potential ecological risk.
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Affiliation(s)
- Zi Wang
- Department of Chemical Engineering for Energy, East China University of Science and Technology, Engineering Research Center of Resource Utilization of Carbon-containing Waste with Low-carbon Emissions, Ministry of Education, 130# Meilong Rd., Shanghai 200237, PR China
| | - Mengxia Yuan
- Tialoc (Shanghai) Environmental, Ltd., 159#, Tianzhou Rd., Shanghai 200233, PR China
| | - Jie Wang
- Department of Chemical Engineering for Energy, East China University of Science and Technology, Engineering Research Center of Resource Utilization of Carbon-containing Waste with Low-carbon Emissions, Ministry of Education, 130# Meilong Rd., Shanghai 200237, PR China.
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2
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Yu D, Li Z, Li J, Li B, Yu H, He J, Wang Y. Role of municipal solid waste incineration fly ash components in co-pyrolysis of oily sludge: Pyrolysis products and catalytic mechanism. JOURNAL OF HAZARDOUS MATERIALS 2024; 471:134368. [PMID: 38657512 DOI: 10.1016/j.jhazmat.2024.134368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Revised: 04/08/2024] [Accepted: 04/18/2024] [Indexed: 04/26/2024]
Abstract
The co-pyrolysis of oily sludge (OS) and municipal solid waste incineration fly ash (IFA) is a promising strategy for sustainable waste management. This study delves into the distinct catalytic roles of individual IFA components during co-pyrolysis and assesses their impact on the inherent Fe species in OS, highlighting their contributions to overall catalytic activity. Notably, in comparison to IFA, CaCl2 and KCl significantly enhance pyrolysis oil upcycling, while IFA components collectively exhibit a positive catalytic effect on pyrolysis gas and coke production. Ca(OH)2 notably boosts H2 yield by 137.16 %. Alkali chlorides facilitate gaseous hydrocarbon formation and convert oxygen-containing compounds to CO and CO2 which are subsequently consumed and absorbed by CaO and Ca(OH)2. CaCl2 and KCl promote heavy compound decomposition and alkane aromatization, reducing coke formation and increasing light aromatic production. Conversely, NaCl increases alkane proportions. However, CaSO4 and CaCO3 hinder catalytic reactions, promoting carbon conversion to coke. Importantly, IFA compounds aid the dispersion of inherent Fe-based species from OS on char surface, enhancing in-situ catalytic pyrolysis. Additionally, the augmented H2 production accelerates the reduction of Fe-based species. The findings expand waste utilization possibilities and provide insights for co-processing solid wastes.
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Affiliation(s)
- Di Yu
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Department of Chemical and Environmental Engineering, University of Nottingham Ningbo China, Ningbo 315100, China; Department of Civil Engineering, University of Nottingham Ningbo China, Ningbo 315100, China
| | - Zhiwei Li
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Jie Li
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Bo Li
- Department of Civil Engineering, University of Nottingham Ningbo China, Ningbo 315100, China
| | - Hao Yu
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China
| | - Jun He
- Department of Chemical and Environmental Engineering, University of Nottingham Ningbo China, Ningbo 315100, China; Nottingham Ningbo China Beacons of Excellence Research and Innovation Institute, Ningbo 315100, China.
| | - Yin Wang
- Key Laboratory of Urban Pollutant Conversion, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, China; Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control, CAS Haixi Industrial Technology Innovation Center in Beilun, Ningbo 315830, China.
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3
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Liu X, Gao M, Zhou Z, Duan L. Mitigating ash-related alkali and heavy metals emissions in rotary kiln through oxygen-carrier-aided combustion of waste. WASTE MANAGEMENT (NEW YORK, N.Y.) 2024; 181:57-67. [PMID: 38583273 DOI: 10.1016/j.wasman.2024.04.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Revised: 03/21/2024] [Accepted: 04/04/2024] [Indexed: 04/09/2024]
Abstract
Rotary kiln (RK) incineration technology gains prominence in waste management, aiming to reduce pollution, recover energy, and minimize waste. Oxygen-carrier (OC)-aided incineration of waste in the RK demonstrates notable benefits by enhancing oxygen distribution uniformity and facilitating fuel conversion. However, the effects of OC on ash-related alkali and heavy metals during waste incineration in the RK remain unknown. In this study, manganese ore and ilmenite as OCs are introduced into RK during waste combustion, focusing on their effects on the bottom ashes and the behavior of alkali and heavy metals. Results show that manganese ore exhibits a decreasing reactivity due to oxygen depletion during the conversion from Mn2O3 to Mn3O4, while ilmenite maintains good reactivity due to sustained enrichment of Fe2O3 on the particles even after multiple cycles in RK. The porous structure on the surface of OCs particles verifies the cyclic reaction involving oxidation by air and reduction by fuel as OCs move between the active and passive layers of the bed. The porous OCs particles offer abundant adsorption sites for K from the gaseous phase, with surface-deposited K migrating into the particles and enhancing the OCs' capacity for K adsorption. Adding OCs promotes the formation of stable, less volatile compounds of heavy metals (As, Cr, Pb, and Zn) and enhances their retention in bottom ash while ensuring the leaching toxicity remains below Chinese national standard limits. This study enhances the understanding of OCs in incineration, guiding vital references for waste management practices and environmental sustainability.
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Affiliation(s)
- Xue Liu
- Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province, School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, China; Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China
| | - Ming Gao
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China; Jiangsu Academy of Environmental Industry and Technology Corp., Nanjing 210019, China
| | - Zhihao Zhou
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China
| | - Lunbo Duan
- Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, School of Energy and Environment, Southeast University, Nanjing 210096, China.
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Zhou Y, Lin F, Ling Z, Zhan M, Zhang G, Yuan D. Comparative study by microwave pyrolysis and conventional pyrolysis of pharmaceutical sludge: Resourceful disposal and antibiotic adsorption. JOURNAL OF HAZARDOUS MATERIALS 2024; 468:133867. [PMID: 38402683 DOI: 10.1016/j.jhazmat.2024.133867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 02/17/2024] [Accepted: 02/21/2024] [Indexed: 02/27/2024]
Abstract
Compared with conventional pyrolysis, microwave pyrolysis has superior heat transfer performance and promotes the decomposition of organic matter. The paper focuses on the harmless treatment and resource utilization of pharmaceutical sludge (PS) by microwave heating and conventional heating methods. The experimental results showed that the conventional pyrolysis gas is dominated by CO2, CO and H2. For microwave pyrolysis gas, the "microwave effect" promoted secondary cracking of volatile fractions and increases the content of CH4, CxHy, H2 and CO through condensation, aromatization, and dehydrogenation. Conventional pyrolysis oils contained the highest percentage of oxygenated compounds. However, high-temperature microwave radiation accelerated the cleavage of polar oxygenated molecular bonds and long-chain hydrocarbons, thereby increasing the aromatics content of pyrolysis oils. The solid residues obtained from microwave pyrolysis is highly graphitized and porous, with a surface area of 146.2 m2/g. Furthermore, the solid residue was rich in pyridine-N and pyrrole-N that could be utilized for adsorption and catalysis. The MA-600 removes up to 99% of tetracycline (TC) in 6 h. It was also found that the adsorption process of TC by the two pyrolysis residues was consistent with the proposed secondary and Freundlich models.
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Affiliation(s)
- Yifan Zhou
- College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou 310018, China
| | - Fawei Lin
- College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou 310018, China; School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, China.
| | - Zhongqian Ling
- College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou 310018, China
| | - Mingxiu Zhan
- College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou 310018, China
| | - Guangxue Zhang
- College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou 310018, China
| | - Dingkun Yuan
- College of Metrology and Measurement Engineering, China Jiliang University, Hangzhou 310018, China; School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, China.
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Zhang W, He Y, Xing X, Wang Y, Li Q, Wang L, Zhu Y. In-depth insight into the effects of intrinsic calcium compounds on the pyrolysis of hazardous petrochemical sludge. JOURNAL OF HAZARDOUS MATERIALS 2023; 455:131593. [PMID: 37172378 DOI: 10.1016/j.jhazmat.2023.131593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 05/01/2023] [Accepted: 05/05/2023] [Indexed: 05/14/2023]
Abstract
To understand the potential effects of intrinsic calcium compounds on sludge pyrolysis, the pyrolysis behavior of petrochemical sludge (PS), calcium carbonate blend PS (CaPS), and decalcified PS (DePS) were investigated using thermogravimetric analysis (TGA) and in-situ Fourier-transform infrared spectroscopy coupled with pyrolysis-gas chromatography and mass spectrometry (Py-GC/MS). The TGA results indicated that decalcification increased and decreased the energy barriers of PS decomposition in ranges 200-350 °C and 350-600 °C, respectively. In contrast, copyrolysis with CaCO3 decreased the activation energy (E) of the pseudoreaction phase 2 (PH2) and altered the mechanism model. Meanwhile, during copyrolysis, char deposition and interaction hindered CaCO3 decomposition. The two-dimensional correlation spectroscopy results, on the other hand, showed that the reaction priority of O-containing groups and CH- vibration of methyl groups were affected by both decalcification and CaCO3 copyrolysis. The Py-GC/MS results indicated that the three sludges mainly released hydrocarbons, N-containing organics, alcohols, aldehydes, and acids. During pyrolysis, CaCO3 also played a neutralization role, which reduced the release of pyrolytic acidic products. In addition, the increase of the pyrolysis temperature increased the hydrocarbon content. This research will guide the industrial application of sludge pyrolysis.
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Affiliation(s)
- Wenqi Zhang
- School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu, China; Jiangsu Province Engineering Research Center of Organic solid wastes deeply treatment and hydrogen production, Jiangsu, China
| | - Yahui He
- School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu, China; Jiangsu Province Engineering Research Center of Organic solid wastes deeply treatment and hydrogen production, Jiangsu, China
| | - Xinxin Xing
- School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu, China; Jiangsu Province Engineering Research Center of Organic solid wastes deeply treatment and hydrogen production, Jiangsu, China
| | - Yinfeng Wang
- School of Energy Science and Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu, China; Jiangsu Province Engineering Research Center of Organic solid wastes deeply treatment and hydrogen production, Jiangsu, China.
| | - Qiyuan Li
- School of Chemical Engineering, The University of New South Wales (UNSW), Kensington, New South Wales 2052, Australia
| | - Lei Wang
- School of Environmental Science and Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu, China
| | - Yuezhao Zhu
- School of Energy Science and Engineering, Nanjing Tech University, Nanjing 211816, Jiangsu, China; Jiangsu Province Engineering Research Center of Organic solid wastes deeply treatment and hydrogen production, Jiangsu, China
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Li J, Lin F, Yu H, Tong X, Cheng Z, Yan B, Song Y, Chen G, Hou L, Crittenden JC. Biochar-Assisted Catalytic Pyrolysis of Oily Sludge to Attain Harmless Disposal and Residue Utilization for Soil Reclamation. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2023; 57:7063-7073. [PMID: 37018050 DOI: 10.1021/acs.est.2c09099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
Pyrolysis of oily sludge (OS) is a feasible technology to match the principle of reduction and recycling; however, it is difficult to confirm the feasible environmental destination and meet the corresponding requirements. Therefore, an integrated strategy of biochar-assisted catalytic pyrolysis (BCP) of OS and residue utilization for soil reclamation is investigated in this study. During the catalytic pyrolysis process, biochar as a catalyst intensifies the removal of recalcitrant petroleum hydrocarbons at the expense of liquid product yield. Concurrently, biochar as an adsorbent can inhibit the release of micromolecular gaseous pollutants (e.g. HCN, H2S, and HCl) and stabilize heavy metals. Due to the assistance of biochar, pyrolysis reactions of OS are more likely to occur and require a lower temperature to achieve the same situation. During the soil reclamation process, the obtained residue as a soil amendment can not only provide a carbon source and mineral nutrients but can also improve the abundance and diversity of microbial communities. Thus, it facilitates the plant germination and the secondary removal of petroleum hydrocarbons. The integrated strategy of BCP of OS and residue utilization for soil reclamation is a promising management strategy, which is expected to realize the coordinated and benign disposal of more than one waste.
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Affiliation(s)
- Jiantao Li
- School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, P. R. China
| | - Fawei Lin
- School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, P. R. China
| | - Hongdi Yu
- School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, P. R. China
| | - Xin Tong
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environmental Science and Engineering, Tongji University, Shanghai 200092, P. R. China
| | - Zhanjun Cheng
- School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, P. R. China
| | - Beibei Yan
- School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, P. R. China
| | - Yingjin Song
- School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, P. R. China
| | - Guanyi Chen
- School of Mechanical Engineering, Tianjin University of Commerce, Tianjin 300134, P. R. China
| | - Li'an Hou
- Xi'an High-Tech Institute, Xi'an 710025, P. R. China
| | - John C Crittenden
- School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
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Zhao Z, Qin W, Long J, Lei J, Xu W, Wang Z. The removal of organic impurities from industrial waste salt by pyrolysis. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:21671-21682. [PMID: 36272002 DOI: 10.1007/s11356-022-23659-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Accepted: 10/12/2022] [Indexed: 06/16/2023]
Abstract
The presence of organic impurities hinders the resource utilization of industrial waste salt (IWS). In this study, pyrolysis treatment was chosen to remove these organic impurities. The optimal process parameters for the pyrolysis of organic impurities were as follows: a temperature of 500 °C and a holding time of 20 min. Under these optimal conditions, the total organic carbon (TOC) removal rate was 96.32%, inducing a decrease in the TOC mass fraction from 1.88 to 0.08%. Fourier transform infrared spectroscopy (FTIR) results obtained during this process showed that prolonging the pyrolysis time (10-70 min) for IWS resulted in a gradual decrease in the relative content of characteristic functional group, such as C-O in ether groups, and the disappearance of functional group, such as benzophenone carbonyl group and ester carbonyl. Organic impurities can release gas-containing compounds that destroy the initially smooth IWS surface, and the resulting particles with rough and irregular shapes fuse into large or lumpy particles during the pyrolysis process. GC‒MS results clearly showed that the number of different semivolatile organic compounds in the IWS was reduced from 35 to 19 as a result of the pyrolysis process. Correspondingly, organic impurities with molecular formulas containing 5-10 carbon atoms converted into compounds containing 6-20 carbon atoms. These findings provide theoretical support for IWS resource utilization.
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Affiliation(s)
- Zongwen Zhao
- Dongjiang Environmental Co., Ltd, Shenzhen, 518057, Guangdong, China
- Guangdong Provincial Key Laboratory of R&D for Resource Utilization and Deep Treatment of Hazardous Waste Liquid, Shenzhen, 518057, Guangdong, China
| | - Weining Qin
- Dongjiang Environmental Co., Ltd, Shenzhen, 518057, Guangdong, China
- Guangdong Provincial Key Laboratory of R&D for Resource Utilization and Deep Treatment of Hazardous Waste Liquid, Shenzhen, 518057, Guangdong, China
| | - Jiang Long
- Dongjiang Environmental Co., Ltd, Shenzhen, 518057, Guangdong, China
- Guangdong Provincial Key Laboratory of R&D for Resource Utilization and Deep Treatment of Hazardous Waste Liquid, Shenzhen, 518057, Guangdong, China
| | - Jie Lei
- Green Eco-Manufacture Co., Ltd, Shenzhen, 518101, Guangdong, China
| | - Wenbin Xu
- Guangdong Provincial Key Laboratory of R&D for Resource Utilization and Deep Treatment of Hazardous Waste Liquid, Shenzhen, 518057, Guangdong, China
| | - Zhongbing Wang
- School of Environment & Chemical Engineering, Nanchang Hangkong University, Nanchang, 330000, Jiangxi, China.
- Guangdong Provincial Key Laboratory of R&D for Resource Utilization and Deep Treatment of Hazardous Waste Liquid, Shenzhen, 518057, Guangdong, China.
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8
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Zhang S, Wu J, Nie Q, Duan X, Yi X. Environmental Risk Analysis Based on Characterization of Ground Oily Sludge. MATERIALS (BASEL, SWITZERLAND) 2022; 15:9054. [PMID: 36556859 PMCID: PMC9781875 DOI: 10.3390/ma15249054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 12/13/2022] [Accepted: 12/14/2022] [Indexed: 06/17/2023]
Abstract
Oily sludge is recognized as hazardous waste. To reduce the potential danger and harmful factors of oily sludge, it is very important to analyze its environmental risk. In this paper, the characterization of oily sludge from Shengli Oilfield in China was tested experimentally, including the composition content, particle size, microscopic morphology, heavy metal content, organic composition, inorganic composition, and thermogravimetric analysis, which were used to analyze environmental risks. The results show that the oil content of oily sludge is as high as 10.3%, which will cause serious pollution. It is calculated that China can recover 772.5 million liters of oil and reduce 553.9 million kg of carbon emissions compared with incineration in one year, if the oily sludge can be managed effectively. The content of heavy metals such as Ba, Zn, Cr, As, Ni, Se, Be, and Hg in oily sludge exceeds the standard. It will restrain the self-healing ability of soil, pollute groundwater, and endanger animals and plants. The organic matter of oily sludge is concentrated in C11 to C29. It contains a large amount of benzene series and polycyclic benzene hydrocarbons, which can lead to cancer in the human body. Inorganic substances in oily sludge are mixed with some additives, which can not only reduce the toxicity of heavy metals, but also be used as building materials. The median particle size D50 of oily sludge is 0.91 μm, and it spreads all over the narrow pores. Generally, it needs to be treated under high temperature conditions, which will cause secondary pollution to the environment. The research content of this paper provides a theoretical reference for the management of oily sludge.
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Affiliation(s)
- Shifan Zhang
- Cooperative Innovation Center of Unconventional Oil and Gas, Yangtze University (Ministry of Education & Hubei Province), Wuhan 430100, China
- School of Mechanical Engineering, Yangtze University, Jingzhou 434023, China
| | - Jiwei Wu
- Cooperative Innovation Center of Unconventional Oil and Gas, Yangtze University (Ministry of Education & Hubei Province), Wuhan 430100, China
- College of Architecture & Environment, Sichuan University, Chengdu 610065, China
- College of Carbon Neutrality Future Technology, Sichuan University, Chengdu 610065, China
| | - Qi Nie
- School of Mechanical Engineering, Yangtze University, Jingzhou 434023, China
| | - Xiaoxu Duan
- College of Architecture & Environment, Sichuan University, Chengdu 610065, China
| | - Xianzhong Yi
- School of Mechanical Engineering, Yangtze University, Jingzhou 434023, China
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Trend in Research on Characterization, Environmental Impacts and Treatment of Oily Sludge: A Systematic Review. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27227795. [PMID: 36431896 PMCID: PMC9695482 DOI: 10.3390/molecules27227795] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 11/08/2022] [Accepted: 11/09/2022] [Indexed: 11/16/2022]
Abstract
Oily sludge is a hazardous material generated from the petroleum industry that has attracted increasing research interest. Although several review articles have dealt with specific subtopics focusing on the treatment of oily sludge based on selected references, no attempt has been made to demonstrate the research trend of oily sludge comprehensively and quantitatively. This study conducted a systematic review to analyze and evaluate all oily sludge-related journal articles retrieved from the Web of Science database. The results show that an increase in oily sludge-related research did not take place until recent years and the distribution of the researchers is geographically out of balance. Most oily sludge-related articles focused on treatment for harmfulness reduction or valorization with limited coverage of formation, characterization, and environmental impact assessment of oily sludge. Pyrolytic treatment has attracted increasing research attention in recent years. So far, the research findings have been largely based on laboratory-scale experiments with insufficient consideration of the cost-effectiveness of the proposed treatment methods. Although many methods have been proposed, few alone could satisfactorily achieve cost-effective treatment goals. To enable sustainable management of oily sludge on a global scale, efforts need to be made to fund more research projects, especially in the major oil-producing countries. Pilot-scale experiments using readily available and affordable materials should be encouraged for practical purposes. This will allow a sensible cost-benefit analysis of a proposed method/procedure for oily sludge treatment. To improve the treatment performance, combined methods are more desirable. To inform the smart selection of methods for the treatment of different oily sludge types, it is suggested to develop universally accepted evaluation systems for characterization and environmental risk of oily sludge.
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Singh R, Paritosh K, Pareek N, Vivekanand V. Integrated system of anaerobic digestion and pyrolysis for valorization of agricultural and food waste towards circular bioeconomy: Review. BIORESOURCE TECHNOLOGY 2022; 360:127596. [PMID: 35809870 DOI: 10.1016/j.biortech.2022.127596] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 07/01/2022] [Accepted: 07/03/2022] [Indexed: 06/15/2023]
Abstract
Agricultural and food waste have become major issue affecting the environment and climate owing to growing population. However, such wastes have potential to produce renewable fuels which will help to meet energy demands. Numerous valorization pathways like anaerobic digestion, pyrolysis, composting and landfilling have been employed for treating such wastes. However, it requires integrated system that could utilize waste and promote circular bioeconomy. This review explores integration of anaerobic digestion and pyrolysis for treating agricultural and food waste. Proposed system examines the production of biochar and pyro-oil by pyrolysis of digestate. The use of this biochar for stabilizing anaerobic digestion process, biogas purification and soil amendment will promote the circular bioeconomy. Kinetic models and framework of techno-economic analysis of system were discussed and knowledge gaps have been identified for future research. This system will provide sustainable approach and offer carbon capture and storage in form of biochar in soil.
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Affiliation(s)
- Rickwinder Singh
- Centre for Energy and Environment, Malaviya National Institute of Technology Jaipur, Jaipur 302017, Rajasthan, India
| | - Kunwar Paritosh
- Hybred Energy Solutions Private Limited, Gift City, Gandhinagar 382007, Gujarat, India
| | - Nidhi Pareek
- Microbial Catalysis and Process Engineering Laboratory, Department of Microbiology, School of Life Sciences, Central University of Rajasthan, Ajmer 305 817, Rajasthan, India
| | - Vivekanand Vivekanand
- Centre for Energy and Environment, Malaviya National Institute of Technology Jaipur, Jaipur 302017, Rajasthan, India.
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11
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Zhao J, Wang Z, Li J, Yan B, Chen G. Pyrolysis of food waste and food waste solid digestate: A comparative investigation. BIORESOURCE TECHNOLOGY 2022; 354:127191. [PMID: 35447328 DOI: 10.1016/j.biortech.2022.127191] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 04/14/2022] [Accepted: 04/15/2022] [Indexed: 06/14/2023]
Abstract
The effects of anaerobic digestion (AD) on pyrolysis were elaborated by comparing the pyrolysis performance of food waste (FW) and food waste solid digestate (FWSD). The pyrolysis mechanisms of FW and FWSD were revealed by experimental and kinetic analysis. The properties and potential applications of pyrolytic products from FW and FWSD were discussed. The results showed that part of organic matters of FW were consumed during AD, which altered the pyrolysis performance of FWSD. The pyrolytic gas from FW had better quality due to its higher lower heating value (LHV) (20.52 kJ/Nm3). The pyrolytic oil and biochar derived from FWSD showed better qualities as oil fuel and carbon-based absorbent. Pyrolysis of FWSD produced less nitrogen-containing pollutants (NCPs) indicated that AD coupled with pyrolysis is more environmental-friendly to treat FW. This study provides potential approach and theoretical guidance for the treatment and resource utilization of FW and FWSD.
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Affiliation(s)
- Juan Zhao
- School of Environment and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China
| | - Zhi Wang
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China
| | - Jian Li
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China.
| | - Beibei Yan
- School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China; Tianjin Key Lab of Biomass Wastes Utilization/Tianjin Engineering Research Center of Bio Gas/Oil Technology, Tianjin 300072, China
| | - Guanyi Chen
- School of Environment and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China; School of Mechanical Engineering, Tianjin University of Commerce, Tianjin 300134, China
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12
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Chen G, Sun B, Li J, Lin F, Xiang L, Yan B. Products distribution and pollutants releasing characteristics during pyrolysis of waste tires under different thermal process. JOURNAL OF HAZARDOUS MATERIALS 2022; 424:127351. [PMID: 34879557 DOI: 10.1016/j.jhazmat.2021.127351] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 09/08/2021] [Accepted: 09/23/2021] [Indexed: 06/13/2023]
Abstract
Pyrolysis has been widely utilized to achieve resource recovery of waste tires by attaining oil and carbon black. However, due to the stacking effect of fixed bed, the heat and mass transfer is insufficient during the pyrolysis process of waste tires. Additionally, the harmful N/S/Cl pollutants and heavy metals are inevitable that has been ignored. This paper systematically studied the effect of promoting heat and mass transfer on the oil quality and pollutant releasing characteristics during the pyrolysis of waste tires. A fixed bed pyrolizer with multifunction was innovatively designed to conduct fast pyrolysis by equipping an intermittent feeder and slow pyrolysis by equipping an agitator. Fast pyrolysis with feeding step by step and slow pyrolysis with stirring could promote the heat and mass transfer, which was firstly researched in lab-scale reactor. The experimental results demonstrated that slow pyrolysis with stirring was recommended with the target of acquiring pyrolytic oil. Promoting heat and mass transfer could improve the quality of oil and increase the retaining proportion of S in char during both fast and slow pyrolysis. The combustion of pyrolysis oil and gas generated more dioxins (0.6 ng/gwt) than the total dioxins in pyrolytic gas and oil (0.06 ng/gwt).
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Affiliation(s)
- Guanyi Chen
- School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, PR China; School of Mechanical Engineering, Tianjin University of Commerce, Tianjin 300134, PR China
| | - Bingyan Sun
- School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, PR China
| | - Jiantao Li
- School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, PR China
| | - Fawei Lin
- School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, PR China.
| | - Li Xiang
- School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, PR China
| | - Beibei Yan
- School of Environmental Science and Engineering, Tianjin University/Tianjin Key Lab of Biomass/Wastes Utilization, Tianjin 300072, PR China
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13
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Ye H, Li Q, Yu H, Xiang L, Wei J, Lin F. Pyrolysis Behaviors and Residue Properties of Iron-Rich Rolling Sludge from Steel Smelting. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2022; 19:ijerph19042152. [PMID: 35206336 PMCID: PMC8871665 DOI: 10.3390/ijerph19042152] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 02/10/2022] [Accepted: 02/12/2022] [Indexed: 12/10/2022]
Abstract
Iron-rich rolling sludge (FeRS) represents a kind of typical solid waste produced in the iron and steel industry, containing a certain amount of oil and large amounts of iron-dominant minerals. Pyrolysis under anaerobic environment can effectively eliminate organics at high temperatures without oxidation of Fe. This paper firstly investigated comprehensively the pyrolysis characteristics of FeRS. The degradation of organics in FeRS mainly occurred before 400 °C. The activation energy for pyrolysis of FeRS was extremely low, ca. 5.44 kJ/mol. The effects of pyrolytic temperature, atmosphere, heating rate, and stirring on pyrolysis characteristics were conducted. Commonly, the yield of solid residues maintained around 85 wt.%, with approximately 13 wt.% oil and 2 wt.% gas. Due to the low yield of oil and gas, their further utilization remains difficult despite CO2 introduction which could upgrade their quality. The solid residues after pyrolysis exhibited porous properties with co-existence of micropores and mesopores. Combined with the high content of zero-valent iron, magnetic property, hydrophobic characteristic, and low density, the solid residues could be further utilized for water pollution control and soil remediation. Moreover, the solid residues were suitable for sintering to recover valuable iron resources. However, the solid residues also contained certain heavy metals, such as Cd, Cr, Cu, Ni, Pb, and Zn, which might cause secondary pollution during their utilization. In particular, the toxic Cr possessed high content, which should be treated with detoxification and removal. This paper provides fundamental information for pyrolysis of FeRS and utilization of solid residues.
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Affiliation(s)
- Hengdi Ye
- National Engineering Research Center of Sintering and Pelletizing Equipment System, Zhongye Changtian International Engineering Co., Ltd., Changsha 410205, China; (H.Y.); (J.W.)
| | - Qian Li
- National Engineering Research Center of Sintering and Pelletizing Equipment System, Zhongye Changtian International Engineering Co., Ltd., Changsha 410205, China; (H.Y.); (J.W.)
- School of Engineering, GongQing Institute of Science and Technology, Jiujiang 332020, China
- Correspondence: (Q.L.); (F.L.)
| | - Hongdi Yu
- Tianjin Key Lab of Biomass/Wastes Utilization, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China; (H.Y.); (L.X.)
| | - Li Xiang
- Tianjin Key Lab of Biomass/Wastes Utilization, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China; (H.Y.); (L.X.)
| | - Jinchao Wei
- National Engineering Research Center of Sintering and Pelletizing Equipment System, Zhongye Changtian International Engineering Co., Ltd., Changsha 410205, China; (H.Y.); (J.W.)
| | - Fawei Lin
- Tianjin Key Lab of Biomass/Wastes Utilization, School of Environmental Science and Engineering, Tianjin University, Tianjin 300072, China; (H.Y.); (L.X.)
- Correspondence: (Q.L.); (F.L.)
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14
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Wan G, Bei L, Yu J, Xu L, Sun L. Products distribution and hazardous elements migration during pyrolysis of oily sludge from the oil refining process. CHEMOSPHERE 2022; 288:132524. [PMID: 34637869 DOI: 10.1016/j.chemosphere.2021.132524] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 09/24/2021] [Accepted: 10/08/2021] [Indexed: 06/13/2023]
Abstract
Oily sludge is a hazardous waste due to the enrichment of nitrogen, sulfur, PAHs, and heavy metals. In this work, an oily sludge from oil refining factory was pyrolyzed at various temperatures of 250-850 °C in a fixed bed reactor focusing on product distribution and migration of hazardous compounds of PAHs, sulfur, nitrogen-containing compounds, and heavy metals. The mechanism of PAHs formation and migration of nitrogen, sulfur, heavy metals were elucidated by comprehensive analysis of the solid, liquid, and gas products. The distribution and risk analysis of heavy metals were also conducted. The pyrolytic products distribution was markedly affected by pyrolysis temperatures. A maximum oil yield was observed at 500 °C, which can further crack into gas due to secondary reaction. The pyrolytic gas was enriched in the order of CO2 > CO > CH4 > H2. At lower temperatures, CO2 was largely generated due to the elimination of oxygen-containing functional groups, while H2 was mainly formed above 450 °C due to the recombination reaction. Higher temperatures promoted more N-/S-containing compounds into tar and gas phases. The N-/S-containing compounds mainly included NH3, HCN, H2S, SO2, COS in the gas phase and amines, indoles, pyridines, nitriles, thiophenes in liquid phase. PAHs with 2-ring to 5-ring were mainly generated due to the secondary reaction at higher temperatures. Moreover, Pyrolysis caused the accumulation of heavy metals in chars. Cd presented a high potential risk while the other heavy metals in chars presented a low risk.
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Affiliation(s)
- Gan Wan
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 430074, Wuhan, Hubei, China
| | - Lei Bei
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 430074, Wuhan, Hubei, China
| | - Jie Yu
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 430074, Wuhan, Hubei, China.
| | - Linlin Xu
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 430074, Wuhan, Hubei, China
| | - Lushi Sun
- State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, 430074, Wuhan, Hubei, China.
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15
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Abstract
Experimental studies of the steam pyrolysis of oil sludge were performed using a flow-type pilot plant with 300 kg/h capacity (raw material) to obtain energy-valuable products, such as liquid hydrocarbons (30.4 wt%), semi-coke (39.6 wt%), non-condensable gas-phase compounds (26.5 wt%), and bitumen (3.5 wt%). The pyrolysis process was conducted at a temperature of 650 ° C and with a steam flow rate of 150 kg/h. Liquid hydrocarbons were considered a target product. Comprehensive studies of their physicochemical characteristics, atomization process, droplet ignition, and combustion were carried out. The studied sample had physicochemical characteristics similar to traditional fuel oil (calorific value—42.6 MJ/kg, sulfur content—0.8 wt%). The jet spraying angle was 25° in view of the improved rheological properties of the test sample, with a homogeneous jet structure and a predominant droplet diameter of no more than 0.4 mm. The flame combustion process was accompanied by the formation of microexplosions, the frequency and intensity of which depended on the temperature of the air (Tg = 450–700 °C). This study, in view of its applied nature, is of interest in the design of new installations and technological systems for hydrocarbon pyrolysis.
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16
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Shi Y, Liu M, Li J, Yao Y, Tang J, Niu Q. The dosage-effect of biochar on anaerobic digestion under the suppression of oily sludge: Performance variation, microbial community succession and potential detoxification mechanisms. JOURNAL OF HAZARDOUS MATERIALS 2022; 421:126819. [PMID: 34396960 DOI: 10.1016/j.jhazmat.2021.126819] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Revised: 07/09/2021] [Accepted: 08/02/2021] [Indexed: 06/13/2023]
Abstract
This study investigated the dosage-effect of biochar on the suppressed mesophilic digestion of oily sludge (OS) containing naphthalene (recalcitrant compound) and starch (easily bioavailable substrate). Methanogenesis was inhibited in control with OS, where biomethane yield (63.33 mL/gVS) was obviously lower than theoretical yield (260.55 mL/gVS). With adding optimal dose of biochar (0.60 g/gVS OS), the highest CH4 yield (138.41 mL/gVS) was 2.19 times of control. Meanwhile, the efficiencies of hydrolysis, acidogenesis and acetogenesis were significantly enhanced. However, excessive biochar (4.80 g/gVS OS) caused negative effects with methanogenic efficiency diminished by 32.5% and lag phase prolonged by 5.72 h. Dissolved organic matter (DOM) analysis showed that humic acid-like and fulvic acid-like components percentages of fluorescence regional integration were decreased because of the adsorption of biochar. In addition, biochar mediating interspecies electron transfer selectively enriched electroactive fermentation bacteria (Clostridium and Bacteroides) and acetoclastic Methanosaeta, which was responsible for promoting mesophilic digestion performance. The functional genes related to metabolism and environmental information processing were potentially activated by biochar. Above results indicate that moderate biochar application may mitigate the bio-toxicity suppression of OS, which help to provide a promising pathway for reinforcing oily wastes bio-treatment.
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Affiliation(s)
- Yongsen Shi
- School of Environmental Science and Engineering, China-America CRC for Environment & Health of Shandong Province, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong 26623, China
| | - Manli Liu
- Shandong Experimental High School, 73 Jingqi Rd, Jinan, Shandong 250001, China
| | - Jingyi Li
- School of Environmental Science and Engineering, China-America CRC for Environment & Health of Shandong Province, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong 26623, China
| | - Yilin Yao
- School of Environmental Science and Engineering, China-America CRC for Environment & Health of Shandong Province, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong 26623, China
| | - Jingchun Tang
- Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education), Tianjin Engineering Center of Environmental Diagnosis and Contamination Remediation, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China
| | - Qigui Niu
- School of Environmental Science and Engineering, China-America CRC for Environment & Health of Shandong Province, Shandong University, 72# Jimo Binhai Road, Qingdao, Shandong 26623, China.
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17
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Enhanced Separation of Oil and Solids in Oily Sludge by Froth Flotation at Normal Temperature. Processes (Basel) 2021. [DOI: 10.3390/pr9122163] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Oily sludge (OS) contains a large number of hazardous materials, and froth flotation can achieve oil recovery and non-hazardous disposal of OS simultaneously. The influence of flotation parameters on OS treatment and the flotation mechanism were studied. OS samples were taken from Shengli Oilfield in May 2017 (OSS) and May 2020 (OST), respectively. Results showed that Na2SiO3 was the suitable flotation reagent treating OSS and OST, which could reduce the viscosity between oil and solids. Increasing flotation time, impeller speed and the ratio of liquid to OS could enhance the pulp shear effect, facilitate the formation of bubble and reduce pulp viscosity, respectively. Under the optimized parameters, the oil content of OST residue could be reduced to 1.2%, and that of OSS could be reduced to 0.6% because of OSS with low heavy oil components and wide solid particle size distribution. Orthogonal experimental results showed that the impeller speed was the most significant factor of all parameters for OSS and OST, and it could produce shear force to decrease the intensity of C-H bonds and destabilize the OS. The oil content of residue could be reduced effectively in the temperature range of 24–45 °C under the action of high impeller speed.
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18
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Mo W, Shan XK, He X, Qiang WJ, Wei XY, Wei B, Fan X, Wu Y. Functional Group Characteristics and Pyrolysis/Combustion Performance of Karamay OS Based on FT-IR and TG-DTG Analyses. ACS OMEGA 2021; 6:27684-27696. [PMID: 34722968 PMCID: PMC8552240 DOI: 10.1021/acsomega.1c02734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Accepted: 07/16/2021] [Indexed: 06/13/2023]
Abstract
Proximate analysis, ultimate analysis, Fourier-transform infrared spectroscopy (FT-IR), and thermogravimetry-differential thermal analysis characterization were carried out on oily sludge (OS) samples OS1-OS5, from Karamay, Xinjiang, China. The Coast-Redfern model (CRm) was used to simulate the pyrolysis and combustion kinetics of oily samples. The results showed that the peak area percentage of benzene ring trisubstitution of OS5, in the range of 700-900 cm-1, is close to 75%, corresponding to its high volatile content. Based on the kinetic analysis by the CRm, it is found that the fitting degree of the five samples is better when the reaction order is selected as n = 2, with R 2 close to 1.00 and 2RT/E to 0. Among them, the S N and D W of OS5 are 17.8 × 10-10%2 min-2 °C-3 and 0.10899 × 10-5% min-1 °C-2, respectively, higher than those of other samples, indicating a good combustion performance.
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Affiliation(s)
- Wenlong Mo
- State
Key Laboratory of Chemistry and Utilization of Carbon Based Energy
Resources and Key Laboratory of Coal Clean Conversion & Chemical
Engineering Process (Xinjiang Uyghur Autonomous Region), College of
Chemical Engineering, Xinjiang University, Urumqi, Xinjiang 830046, China
| | - Xian-Kang Shan
- State
Key Laboratory of Chemistry and Utilization of Carbon Based Energy
Resources and Key Laboratory of Coal Clean Conversion & Chemical
Engineering Process (Xinjiang Uyghur Autonomous Region), College of
Chemical Engineering, Xinjiang University, Urumqi, Xinjiang 830046, China
| | - Xiaoqiang He
- State
Key Laboratory of Chemistry and Utilization of Carbon Based Energy
Resources and Key Laboratory of Coal Clean Conversion & Chemical
Engineering Process (Xinjiang Uyghur Autonomous Region), College of
Chemical Engineering, Xinjiang University, Urumqi, Xinjiang 830046, China
| | - Wen-Jie Qiang
- State
Key Laboratory of Chemistry and Utilization of Carbon Based Energy
Resources and Key Laboratory of Coal Clean Conversion & Chemical
Engineering Process (Xinjiang Uyghur Autonomous Region), College of
Chemical Engineering, Xinjiang University, Urumqi, Xinjiang 830046, China
| | - Xian-Yong Wei
- State
Key Laboratory of Chemistry and Utilization of Carbon Based Energy
Resources and Key Laboratory of Coal Clean Conversion & Chemical
Engineering Process (Xinjiang Uyghur Autonomous Region), College of
Chemical Engineering, Xinjiang University, Urumqi, Xinjiang 830046, China
- Key
Laboratory of Coal Processing and Efficient Utilization, China University
of Mining & Technology, Ministry of
Education, Xuzhou 221116, Jiangsu, China
| | - Bo Wei
- State
Key Laboratory of Chemistry and Utilization of Carbon Based Energy
Resources and Key Laboratory of Coal Clean Conversion & Chemical
Engineering Process (Xinjiang Uyghur Autonomous Region), College of
Chemical Engineering, Xinjiang University, Urumqi, Xinjiang 830046, China
| | - Xing Fan
- State
Key Laboratory of Chemistry and Utilization of Carbon Based Energy
Resources and Key Laboratory of Coal Clean Conversion & Chemical
Engineering Process (Xinjiang Uyghur Autonomous Region), College of
Chemical Engineering, Xinjiang University, Urumqi, Xinjiang 830046, China
- College
of Chemical and Biological Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, China
| | - Yulong Wu
- State
Key Laboratory of Chemistry and Utilization of Carbon Based Energy
Resources and Key Laboratory of Coal Clean Conversion & Chemical
Engineering Process (Xinjiang Uyghur Autonomous Region), College of
Chemical Engineering, Xinjiang University, Urumqi, Xinjiang 830046, China
- Institute
of Nuclear and New Energy Technology, Tsinghua
University, Beijing 100084, China
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19
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Chu Z, Gong Z, Zhang H, Wang Z, Liu L, Wang Z, Wu J, Wang J, Li X, Guo Y, Zhang J, Li G. Pyrolysis characteristics and kinetics analysis of oil sludge with CaO additive. ENVIRONMENTAL TECHNOLOGY 2021; 43:1-11. [PMID: 34236009 DOI: 10.1080/09593330.2021.1954095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 07/02/2021] [Indexed: 06/13/2023]
Abstract
In the process of exploitation, transportation and refining of high-sulfur crude oil, a large number of oil sludge (OS) with high sulfur content is produced. Pyrolysis has been proved to be an effective method for OS disposal, but for solid waste with high sulfur content, lots of sulfur-containing gases will be released during thermal disposal. The addition of calcium oxide in pyrolysis process is an economical and effective way to capture sulfur-containing gases. In order to understand the pyrolysis process of OS with CaO, a thermogravimetric analyser was used to conduct pyrolysis experiments of OS with different Ca/S molar ratios (0, 1, 2 and 3) at different heating rates (10°C/min, 20°C/min, 30°C/min and 40°C/min). The results showed that with the increase of CaO addition the derivative thermogravimetric curves showed a gentle trend. In addition, new weight loss peaks were occurred at 700-900°C and after 1100°C, which were the decomposition of calcium carbonate and calcium sulfate, respectively. The kinetic parameters were solved by Friedman, FWO, and Starink methods, and the results were similar, with an average activation energies (E) value of 214 kJ/mol. The change trend of the activation energy was followed by an increase and then a decrease corresponding to the change of energy demand for the reaction. The calculated average values of ΔH, ΔG and ΔS were about 207, 447 and -0.3250 kJ/mol, respectively. When the conversion rate was 0.5, the thermodynamic parameters reached their maximum values.
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Affiliation(s)
- Zhiwei Chu
- College of New Energy, China University of Petroleum (East China), Qingdao, People's Republic of China
| | - Zhiqiang Gong
- State Grid Shandong Electric Power Research Institute, Jinan, People's Republic of China
| | - Haoteng Zhang
- College of New Energy, China University of Petroleum (East China), Qingdao, People's Republic of China
| | - Zhenbo Wang
- College of New Energy, China University of Petroleum (East China), Qingdao, People's Republic of China
| | - Lei Liu
- College of New Energy, China University of Petroleum (East China), Qingdao, People's Republic of China
| | - Ziyi Wang
- College of New Energy, China University of Petroleum (East China), Qingdao, People's Republic of China
| | - Jinhui Wu
- College of New Energy, China University of Petroleum (East China), Qingdao, People's Republic of China
| | - Jianzhu Wang
- College of New Energy, China University of Petroleum (East China), Qingdao, People's Republic of China
| | - Xiaoyu Li
- College of Mechanical and Electronic Engineering, Shandong University of Science and Technology, Qingdao, People's Republic of China
| | - Yizhi Guo
- Dalian Yishunlvse Technology Co., Ltd., Dalian, People's Republic of China
| | - Jianqiang Zhang
- Dalian Yishunlvse Technology Co., Ltd., Dalian, People's Republic of China
| | - Guoen Li
- Dalian Yishunlvse Technology Co., Ltd., Dalian, People's Republic of China
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