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Shang Z, Xu P, Feng T, Sun Y, He K, Li G, Li X. Probe into a novel surfactant-free microemulsion system of ethylene glycol monobutyl ether + water + diesel for crude oil removal and recovery from oily sludge. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 945:174037. [PMID: 38901590 DOI: 10.1016/j.scitotenv.2024.174037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2023] [Revised: 06/03/2024] [Accepted: 06/14/2024] [Indexed: 06/22/2024]
Abstract
A novel surfactant-free microemulsion (SFME) system was proposed in this study, and applied in the crude oil removal and recovery from oily sludge (OS). Based on an investigation of the SFME phase behavior and solution properties, a complete ternary phase diagram was constructed. The SFME with three-liquid phase equilibrium (Winsor III type) was selected for the treatment of OS to achieve simultaneous efficient removal (up to 95.1 %) and recovery (up to 83.2 %) of crude oil. The SFME could be reused continuously for OS treatment without purification. The removal efficiency could still keep >75.9 % after 5 times of reuse, showing high reusability. The detached crude oil could be automatically recovered based on the phase equilibrium principle without additional separation. In the washing experiments, single-factor and multi-factor orthogonal tests were applied to investigate the effects of different experimental conditions on oil removal efficiency and determine the optimal experimental scheme. The treated OS was sufficiently decontaminated according to the morphology, composition, and properties analysis by scanning electron microscopy, Fourier transform infrared spectroscopy, thermogravimetric analysis and contact angle. The composition of the recovered crude oil was identical to that of commercial crude oil according to gas chromatography-mass spectrometry analysis, showing a high recovery value. The kinetic analysis revealed that crude oil desorption experienced three main stages: membrane diffusion, intra-particle diffusion and surface desorption, and identified the chemisorption was the main interaction between the oil-soil. Finally, the mechanism of SFME action was assessed for dissolution and activation based on ultra-low IFT.
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Affiliation(s)
- Zhijie Shang
- Department of Chemistry and Chemical Engineering, University of Science and Technology Beijing, Beijing 100083, PR China
| | - Pan Xu
- Department of Chemistry and Chemical Engineering, University of Science and Technology Beijing, Beijing 100083, PR China
| | - Tongtong Feng
- Department of Chemistry and Chemical Engineering, University of Science and Technology Beijing, Beijing 100083, PR China
| | - Yapeng Sun
- Department of Chemistry and Chemical Engineering, University of Science and Technology Beijing, Beijing 100083, PR China
| | - Kaifan He
- Department of Chemistry and Chemical Engineering, University of Science and Technology Beijing, Beijing 100083, PR China
| | - Guoxuan Li
- State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Box 266, Beijing 100029, PR China
| | - Xinxue Li
- Department of Chemistry and Chemical Engineering, University of Science and Technology Beijing, Beijing 100083, PR China.
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Tian M, Liu H, Cui J, Weng Y, Wang X, Feng E, Zhang W, Cao C, Wen J, Huang G, Xu S. Mechanism of highly efficient oil removal from spent hydrodesulfurization catalysts by ultrasound-assisted surfactant cleaning methods. JOURNAL OF HAZARDOUS MATERIALS 2024; 472:134514. [PMID: 38718511 DOI: 10.1016/j.jhazmat.2024.134514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 04/24/2024] [Accepted: 04/30/2024] [Indexed: 05/30/2024]
Abstract
The removal of crude oil from spent hydrodesulfurization catalysts constitutes the preliminary stage in the recovery process of valuable metals. However, the traditional roasting method for the removal exhibits massive limitations. In view of this, the present study used an ultrasound-assisted surfactant cleaning method to remove crude oil from spent hydrodesulfurization catalysts, which demonstrated effectiveness. Furthermore, the study investigated the mechanism governing the process with calculation and experiments, so as to provide a comprehensive understanding of the cleaning method's efficacy. The surfactant selection was predicated on the performance in the IFT test, with SDBS and TX-100 finally being chosen. Subsequent calculations and analysis were then conducted to elucidate their frontier molecular orbitals, electrostatic potential, and polarity. It has been found that both SDBS and TX-100 possess the smallest LUMO-HOMO energy gap (ΔE), registering at 4.91 eV and 4.80 eV, respectively, and presenting the highest interfacial reactivity. The hydrophilic structure in the surfactant regulates the wettability of the oil-water interface, and the long-chain alkanes have excellent non-polar properties that promote the dissolution of crude oil. The ultrasonic-assisted process further improves the interface properties and enhances the oil removal effect. Surprisingly, the crude oil residue was reduced to 0.25% under optimal conditions. The final phase entailed the techno-economic evaluation of the entire process, revealing that, in comparison to the roasting method, this process saves $0.38 per kilogram of spent HDS catalyst, with the advantages of operational simplicity and emission-free. Generally, this study shed new light on the realization of efficient oil removal, with the salience of green, sustainable, and economical.
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Affiliation(s)
- Maolin Tian
- College of New Energy and Materials, China University of Petroleum, Beijing 102249, China; State Key Laboratory of Heavy Oil, China University of Petroleum, Beijing 102249, China
| | - Hongtao Liu
- College of New Energy and Materials, China University of Petroleum, Beijing 102249, China; State Key Laboratory of Heavy Oil, China University of Petroleum, Beijing 102249, China
| | - Jian Cui
- College of New Energy and Materials, China University of Petroleum, Beijing 102249, China; State Key Laboratory of Heavy Oil, China University of Petroleum, Beijing 102249, China
| | - Yaqing Weng
- Jiangxi Academy of Sciences, Jiangxi 330096, China
| | - Xueli Wang
- College of New Energy and Materials, China University of Petroleum, Beijing 102249, China; State Key Laboratory of Heavy Oil, China University of Petroleum, Beijing 102249, China
| | - Erkang Feng
- College of New Energy and Materials, China University of Petroleum, Beijing 102249, China; State Key Laboratory of Heavy Oil, China University of Petroleum, Beijing 102249, China
| | - Wenjie Zhang
- College of New Energy and Materials, China University of Petroleum, Beijing 102249, China; State Key Laboratory of Heavy Oil, China University of Petroleum, Beijing 102249, China
| | - Caifang Cao
- Jiangxi University of Science and Technology, Jiangxi, 341000, China
| | - Jiawei Wen
- College of New Energy and Materials, China University of Petroleum, Beijing 102249, China; State Key Laboratory of Heavy Oil, China University of Petroleum, Beijing 102249, China.
| | - Guoyong Huang
- College of New Energy and Materials, China University of Petroleum, Beijing 102249, China; State Key Laboratory of Heavy Oil, China University of Petroleum, Beijing 102249, China.
| | - Shengming Xu
- Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China; Beijing Key Lab of Fine Ceramics, Tsinghua University, Beijing 100084, China
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Yan Y, Tong K, Li C, Pan L. The methods for improving the biodegradability of oily sludge: a critical review. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:41844-41853. [PMID: 38866932 DOI: 10.1007/s11356-024-33950-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Accepted: 06/05/2024] [Indexed: 06/14/2024]
Abstract
Biological degradation method, as an environmentally friendly, low-carbon, and clean pollution treatment technology, is widely used for the harmless disposal of oily sludge. The biodegradability of oily sludge with stable emulsification system, high oil, and water content is poor. Therefore, it is necessary to pre-treat the oily sludge to improve its biodegradability, including recover the petroleum resources and remove heavy metals and bio-toxic organic matters. This review systematically summarizes five oily sludge treatment methods and their influences on sludge biodegradability, including pyrolysis, chemical hot washing, solvent extraction, chemical oxidation, and hydrothermal. Pyrolysis at temperatures above 750 °C produces high molecular weight polycyclic aromatic hydrocarbons, chemical hot washing and chemical oxidation would cause secondary pollution, solvent extraction method could not be applied due to the high cost and high toxicity of the extractant, and the oil removal of hydrothermal method is inefficient. Additionally, the principles, advantages, and disadvantages of those treatments and the factors affecting microbial degradation were analyzed, which provide the development direction of pretreatment technology to improve the biodegradability of oily sludge.
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Affiliation(s)
- Yuhao Yan
- State Key Laboratory of Petroleum Pollution Control, Beijing, 102206, China
- CNPC Research Institute of Safety and Environmental Technology, Beijing, 102206, China
- College of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an, 710021, China
| | - Kun Tong
- State Key Laboratory of Petroleum Pollution Control, Beijing, 102206, China.
- CNPC Research Institute of Safety and Environmental Technology, Beijing, 102206, China.
| | - Chengtao Li
- College of Environmental Science and Engineering, Shaanxi University of Science & Technology, Xi'an, 710021, China
| | - Lifang Pan
- State Key Laboratory of Petroleum Pollution Control, Beijing, 102206, China
- CNPC Research Institute of Safety and Environmental Technology, Beijing, 102206, China
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Wang J, Lai Y, Wang X, Ji H. Advances in ultrasonic treatment of oily sludge: mechanisms, industrial applications, and integration with combined treatment technologies. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2024; 31:14466-14483. [PMID: 38296931 DOI: 10.1007/s11356-024-32089-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Accepted: 01/16/2024] [Indexed: 02/02/2024]
Abstract
In the petroleum sector, the generation of oily sludge is an unavoidable byproduct, necessitating the development of efficient treatment strategies for both economic gain and the mitigation of negative environmental impacts. The intricate composition of oily sludge poses a formidable challenge, as existing treatment methodologies frequently fall short of achieving baseline disposal criteria. The processes of demulsification and dehydration are integral to diminishing the oil content and reclaiming valuable crude oil, thereby playing a critical role in the management of oily sludge. Among the myriad of treatment solutions, ultrasonic technology has emerged as a particularly effective physical method, celebrated for its diverse applications and lack of resultant secondary pollution. This comprehensive review delves into the underlying mechanisms and recent progress in the ultrasonic treatment of oily sludge, with a specific focus on its industrial implementations within China. Both isolated ultrasonic treatment and its combination with other technological approaches have proven successful in addressing oily sludge challenges. The adoption of industrial-scale systems that amalgamate ultrasound with multi-technological processes has shown marked enhancements in treatment efficacy. The fusion of ultrasonic technology with other cutting-edge methods holds considerable potential across a spectrum of applications. To fulfill the goals of resource recovery, reduction, and neutralization in oily sludge management, the industrial adoption and adept application of a variety of treatment technologies are imperative.
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Affiliation(s)
- Jian Wang
- University of Science and Technology Beijing, Beijing, China
| | - Yujian Lai
- University of Science and Technology Beijing, Beijing, China
| | - Xuemei Wang
- University of Science and Technology Beijing, Beijing, China
| | - Hongbing Ji
- University of Science and Technology Beijing, Beijing, China.
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Yim H, Valizadeh S, Park YK. Hydrogen production from hazardous petroleum sludge gasification over nickel-loaded porous ZSM-5 and Al 2O 3 catalysts under air condition. ENVIRONMENTAL RESEARCH 2023; 225:115586. [PMID: 36858303 DOI: 10.1016/j.envres.2023.115586] [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: 12/31/2022] [Revised: 02/15/2023] [Accepted: 02/25/2023] [Indexed: 06/18/2023]
Abstract
In this study, the potential of petroleum sludge (PS) for hydrogen production via the gasification process was evaluated. For this purpose, nickel (Ni)-loaded ZSM-5 and γ-Al2O3 (Ni-ZS and Ni-Al) catalysts were prepared and employed for PS gasification in air condition. The effects of different supports, Ni loading content, and reaction temperatures on the production of hydrogen-rich syngas along with the stability and reusability of the best catalyst were investigated. Applying 5%Ni-ZS obtained more gas yield (68.09 wt%) and hydrogen selectivity (25.04 vol%) compared to those obtained by 5%Ni-Al mostly owing to weak metal-support interactions which led to the dominance of well-dispersed metallic Ni. At various Ni loading percentages, 10%Ni-ZS showed the highest catalytic efficiency, which increased both gas yield (70.92 wt%) and hydrogen selectivity (30.74 vol%). However, excessive Ni content (especially 20%) significantly reduced the gas yield and hydrogen selectivity because of limited accessibility of support's active sites, poor dispersion of Ni, and inappropriate acidity. Increasing the temperature promoted the gas yield and produced hydrogen, where the highest gas yield (73.18 wt%) and hydrogen selectivity (33.15 vol%) were obtained at 850 °C due to the endothermic nature of gasification reactions. The 10%Ni-ZS catalyst showed proper stability during three consecutive experiments at 850 °C. The spent catalyst was successfully regenerated without a significant reduction in activity or selectivity.
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Affiliation(s)
- Hoesuk Yim
- School of Environmental Engineering, University of Seoul, Seoul, 02504, South Korea
| | - Soheil Valizadeh
- School of Environmental Engineering, University of Seoul, Seoul, 02504, South Korea
| | - Y-K Park
- School of Environmental Engineering, University of Seoul, Seoul, 02504, South Korea.
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A Nano-Cleaning Fluid for Downhole Casing Cleaning. Polymers (Basel) 2023; 15:polym15061447. [PMID: 36987230 PMCID: PMC10056438 DOI: 10.3390/polym15061447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 02/25/2023] [Accepted: 02/27/2023] [Indexed: 03/17/2023] Open
Abstract
In drilling and completion projects, sludge is formed as a byproduct when barite and oil are mixed, and later sticks to the casing. This phenomenon has caused a delay in drilling progress, and increased exploration and development costs. Since nano-emulsions have low interfacial surface tension, wetting, and reversal capabilities, this study used nano-emulsions with a particle size of about 14 nm to prepare a cleaning fluid system. This system enhances stability through the network structure in the fiber-reinforced system, and prepares a set of nano-cleaning fluids with adjustable density for ultra-deep wells. The effective viscosity of the nano-cleaning fluid reaches 11 mPa·s, and the system is stable for up to 8 h. In addition, this research independently developed an indoor evaluation instrument. Based on on-site parameters, the performance of the nano-cleaning fluid was evaluated from multiple angles by heating to 150 °C and pressurizing to 3.0 Mpa to simulate downhole temperature and pressure. The evaluation results show that the viscosity and shear value of the nano-cleaning fluid system is greatly affected by the fiber content, and the cleaning efficiency is greatly affected by the concentration of the nano-emulsion. Curve fitting shows that the average processing efficiency could reach 60–85% within 25 min and the cleaning efficiency has a linear relationship with time. The cleaning efficiency has a linear relationship with time, where R2 = 0.98335. The nano-cleaning fluid enables the deconstruction and carrying of the sludge attached to the well wall, which accomplishes the purpose of downhole cleaning.
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Hanxuan S, Yan Y, Weiru Z, Bibiche EEAF, Qingwen Z, Jixiang G. Synthesis of nano-β-CD@Fe 3O 4 magnetic material and its application in ultrasonic treatment of oily sludge. ULTRASONICS SONOCHEMISTRY 2023; 92:106256. [PMID: 36502680 PMCID: PMC9763504 DOI: 10.1016/j.ultsonch.2022.106256] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/11/2022] [Revised: 11/22/2022] [Accepted: 12/03/2022] [Indexed: 06/17/2023]
Abstract
The extraction process of Tarim oil field in Xinjiang is accompanied by a large amount of oily sludge generation, which seriously restricts the progress of oil and gas development and causes serious pollution to the environment due to its large production, complex composition, and difficult treatment. Nanomaterials combined with ultrasound have been demonstrated to be a promising method for the disposal of hazardous oily sludge. In this paper, a magnetic material Nano-β-CD@Fe3O4 was prepared by hydrothermal method and surface modification method. Nano-β-CD@Fe3O4 can be intelligently enriched at the oil-water interface and oil-solid interface, and it can be stably dispersed to form nanofluid under the action of ultrasound. Nano-β-CD@Fe3O4 can cause changes in oil composition when it is exposed to ultrasound, resulting in the decrease of viscosity and increase of fluidity. The experimental results of treating oily sludge in Xinjiang Tarim showed that the best treatment effect was achieved when the concentration of Nano-β-CD@Fe3O4 was 0.5 %, the ultrasonic frequency was 60 Hz and the temperature was 60℃. This solution can reach 90.17 % oil removal efficiency within 45 min, and the secondary oil removal efficiency of Nano-β-CD@Fe3O4 recovered by magnetic separation could still reach 85.65 %. This efficient oily sludge treatment method proposed in our study provides valuable information for the development of oily sludge treatment technology.
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Affiliation(s)
- Song Hanxuan
- China University of Petroleum, Beijing, China; State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum Beijing, China
| | - Ye Yan
- China University of Petroleum, Beijing, China; State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum Beijing, China.
| | - Zheng Weiru
- China University of Petroleum, Beijing, China; State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum Beijing, China
| | | | - Zhang Qingwen
- China University of Petroleum, Beijing, China; State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum Beijing, China
| | - Guo Jixiang
- China University of Petroleum, Beijing, China; State Key Laboratory of Petroleum Resource and Prospecting China University of Petroleum Beijing, China
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Liu W, Fu H, Bao M, Luo C, Han X, Zhang D, Liu H, Li Y, Lu J. Emulsions stabilized by asphaltene-polyacrylamide-soil three-phase components: Stabilization mechanism and concentration effects. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122157] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Hou J, Song F, Ji X, Lin S. Ionic liquids enhanced oil recovery from oily sludge-experiment and mechanism. ARAB J CHEM 2022. [DOI: 10.1016/j.arabjc.2022.104210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
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Chang X, Wang Z, Li X, Ge S, Li A, Ma Y, Li Q. Preparation of ionic liquids microemulsion and its application for the treatment of oily sludge. J DISPER SCI TECHNOL 2022. [DOI: 10.1080/01932691.2022.2136194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Affiliation(s)
- Xiujie Chang
- School of Materials Science and Engineering, Shandong University of Technology, Zibo, Shandong, PR China
| | - Zhaodong Wang
- Dezhou Linglong Tire Co., Ltd, Dezhou, Shandong, PR China
| | - Xueshu Li
- School of Materials Science and Engineering, Shandong University of Technology, Zibo, Shandong, PR China
| | - Shujin Ge
- School of Materials Science and Engineering, Shandong University of Technology, Zibo, Shandong, PR China
| | - Aixiang Li
- School of Materials Science and Engineering, Shandong University of Technology, Zibo, Shandong, PR China
| | - Yanfei Ma
- School of Resources and Environmental Engineering, Shandong University of Technology, Zibo, Shandong, PR China
| | - Qiuhong Li
- School of Materials Science and Engineering, Shandong University of Technology, Zibo, Shandong, PR China
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NiO-Ni foam supported Ag3PO4 for efficient photoelectrocatalytic degradation of oil pollutant in water. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2021.120410] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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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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