CHEMOSPHERE
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2022
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IF 8.943
Fan Ye,Liwei Shen,Shi Liu,Huanyu Liu,Xinyuan Zhang,Zejun Zhang,Ying Yang,Xuening Feng,Yuqi Tang,Dong Xiang,Yuanzhu Mi,Xuemin Yan
This work aims to prepare two new amphiphilic and interfacial active gemini ionic liquids to treat crude oil and investigates its demulsification mechanism. Tetraethylene glycol was pretreated with thionyl chloride and used as a linker to connect succinimide or phthalimide , and then reacted with dodecyl benzene sulphonic acid to obtain the corresponding amphiphilic and interfacial active gemini ionic liquid STA or PTA, respectively. 1 H nuclear magnetic resonance spectroscopy ( 1 HNMR) and Fourier-transform infrared spectroscopy (FTIR) was used to determine the chemical structures. The demulsification tests showed the demulsification efficiency with 150 mg/L of STA or PTA at 60 °C for 30 min was 99.89% and 99.79%, respectively. Furthermore, the demulsification mechanism of STA and PTA were studied and the prominent demulsification ability of STA and PTA were attributed to the better interfacial activity and amphipathy which could destroy the asphaltenes interfacial film. These results showed that STA and PTA had excellent demulsification efficiency, which promised application in petroleum industry .
研究领域:
石油化学
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界面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY & FUELS
·
2020
·
IF 3.421
Han Jia,Jiajun Dai,Pan Huang,Yugui Han,Qiuxia Wang,Juan He,Jinyong Song,Xin Wei,Hui Yan,Dexin Liu
It is greatly desired to develop a high-efficiency demulsifier for the treatment of O/W emulsions in the production fluids of the petroleum industry. In this study, the amphiphilic Janus-SiO2 nanoparticles (Janus-C18) was synthesized and used as a demulsifier for surfactant-stabilized O/W emulsions. The successful preparation of Janus-C18 was verified by transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA), and contact angle measurements. Then, Janus-C18’s demulsification efficiency was systematically evaluated by the bottle test. Various silica nanoparticles and emulsifier were employed in the control experiments. Based on the Janus-C18’s demulsification performance in different conditions and the ζ-potential measurement, the possible demulsification mechanism of Janus-C18 was proposed. Furthermore, Janus-C18 exhibited excellent performance in separating oil from crude oil/water emulsions at a relatively low concentration (150 mg/L), with the oil removal rate exceeding 99%.
研究领域:
化学工程
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材料科学
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石油工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
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2023
·
IF 2.2
Yu Zhang,Jiazhe Kuang,Bin Li,Yuanzhu Mi,Ying Yang,Xuening Feng
In this work, a PAMAM@SiO2 demulsifier was synthesized by the reaction of a hyperbranched poly (amido amine) (PAMAM) and KH570 modified SiO2. The structure, morphology and composition of PAMAM@SiO2 were characterized by FT-IR, SEM and EDS. The effect of the concentration of PAMAM@SiO2, salinity and temperature on the demulsification performance was systematically studied. The results showed that the transmittance of aqueous phase after demulsification could reach as high as 92.1% at optimal conditions, and corresponding oil removal rate was 99.53%. Interfacial activity, three-phase contact angle, self-assembly of interfacial film and dynamic interfacial tension were investigated to explore the demulsification mechanism. Also, the aggregation process of oil droplets in emulsion was observed with a microscope. It indicates that the PAMAM@SiO2 demulsifier has a potential application in the treatment process of oily wastewater.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION SCIENCE AND TECHNOLOGY
·
2024
·
IF 2.3
Sisi Yuan,Xiujun Wang,Yongjun Wang,Ming Duan,Yan Xiong,Shenwen Fang
Polyacrylate crude oil demulsifier is one of the hot topics in the research and development of demulsifier at present, there is a lack of systematic comparative study on performance and properties of polyether and polyacrylate crude oil demulsifier. In this paper, the demulsification performance and microscopic demulsification process of the two demulsifiers, namely polyacrylate P(MA-DBC) and polyether P199–59 are discussed. The demulsification performance of polyether P199–59 was superior to that of polyacrylate P(MA-DBC). The study of the microscopic process of demulsification established that for P199–59, the diffusion rate was faster, the saturated adsorption capacity was higher, the ability to destroy the oil-water interface film was stronger and the probability of water droplets collision coalescence was higher; therefore, it can achieve faster dehydration speed and higher dehydration rate than that of P(MA-DBC). The results of this comparative study are meaningful for improving the demulsification performance of polyacrylate demulsifier.
研究领域:
化学工程
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石油工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF HAZARDOUS MATERIALS
·
2024
·
IF 12.2
Liwei Shen,Guosheng Ai,Hanguang Liu,Lianggen Zhu,Lu Lai,Xuemin Yan,Weichu Yu,Yuanzhu Mi
A significant amount of water-in-oil (W/O) emulsion is generated during petroleum extraction. However, the current commercial demulsifiers are expensive to produce and requires high demulsification temperatures, leading to increased energy and economic consumption. To enhance the efficiency of demulsifiers and reduce the cost of demulsifying W/O emulsions, we have successfully developed a novel demulsifier named TCED through a straightforward two-step process. This demulsifier features trimethyl citrate as the hydrophilic core grafted with three hydrophobic chains. Its structure was characterized using EA, FT-IR and 1 H NMR spectroscopy , and the demulsification performance was comprehensively evaluated. At a low demulsification temperature of 40 °C, TCED demonstrated a remarkable demulsification efficiency (DE) of 99.06% and 98.74% in emulsions containing water contents of 70% (E70) and 50% (E50), respectively. Especially, a DE of 100% could be obtained in both E70 and E50 emulsions at a concentration of 600 mg/L. Moreover, TCED displayed a high DE even at high salinity levels of 50,000 mg/L and across a wide pH range of 2–10. Additionally, the phase interface was consistently clear after demulsification. To investigate the demulsification mechanism of TCED, various adsorption kinetics experiments were conducted, including measurements of interfacial tension (IFT), surface tension (SFT), interfacial competitive adsorption, and stability of interfacial film. The results obtained from the experiments indicated that TCED possessed remarkable diffusion and replacement capabilities within the emulsions. As a result, it effectively disrupted the original interfacial active substances, such as asphaltenes aggregates found in crude oil. TCED exhibits a high DE at low concentration and temperature. This characteristic highlights its significant potential for low-temperature demulsification applications in the petroleum industry.
研究领域:
石油化学
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表面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2016
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IF 5.31
Shenwen Fang,Bin Chen,Ting Chen,Ming Duan,Yan Xiong,Peng Shi
In this work, a novel magnetic demulsifier was synthesized by a facile way within one step. The propyleneoxide-ethyleneoxide block polyether , one of the most frequently used demulsifier in petroleum industry , was endowed with the magnetism by reacting with iron (III) acetylacetonate. The as-prepared magnetic demulsifier was characterized by transmission electron microscopy (TEM), superconducting quantum interference device (SQUID), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The magnetic demulsifier showed excellent demulsification performance for water in crude oil emulsion. The demulsification process was revealed by using confocal microscope. Besides, the used magnetic demulsifier could be readily recycled by magnetic separation and solvent washing, and it presented excellent demulsification performance within 3 cycles. The findings in this work might provide a facile approach to prepare varieties of magnetic demulsifiers.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Cleaner Production
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2021
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IF 9.297
Peng Shi,Rui Zhang,Wanfen Pu,Rui Liu,Shenwen Fang
The coalescence and separation of surfactant stabilized water-in-oil emulsion was an important process in the chemical industry but the conventional thermo-chemical demulsification had high energy and reagent consumption. The studies on demulsification at room temperature via porous materials usually involved the emulsion with low water content (<1%). This study demonstrated the coalescence of W/O emulsion with 50% water content via filtration by a demulsifier-grafted polyether sulfone (PES) microfiltration membrane. The material worked as coalescer and it divided the emulsion into layered oil and water with high purity after filtration. The obtained material was analyzed by attenuated total reflectance infrared spectroscopy (ATR-FTIR) and X ray photoelectron spectroscopy (XPS) to prove the existence of demulsifier. When the demulsifier loading was 0.8 wt% of the solvent, the initiator loading was 0.8 wt% of the demulsifier, and the polymerization grafting was carried out at 50 ° C for 5 h, the demulsification efficiency could reach 97.9%. The separation efficiency of the oil from water and the water from oil could get up to 99.5% simultaneously.
研究领域:
化学工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2024
·
IF 5.2
You Mu,Shujun Yang,Zhaoqi Shao,Zhikai Fu,Sili Ren
Modified kaolin demulsifiers were synthesized by grafting chitosan quaternary ammonium salt (QC) on kaolin nanoparticles with different particle sizes (KAO1@ATPES-QC and KAO2@ATPES-QC). The morphology, structure, and interfacial activity of kaolin before and after modification were characterized. Contact angle measurement, interfacial tension characterization, and the distribution of nanoparticle materials in the oil–water mixture showed that the nanodemulsifier KAO1@ATPES-QC possessed good interfacial activity and amphiphilicity. ζ-potential measurements showed that grafting QC can significantly increase the ζ-potential of KAO1@ATPES-QC, allowing it to display positive charges over a broad pH range. The demulsification performance of the prepared materials was evaluated by a bottle test. The results show that the modified kaolin with a smaller particle size has better demulsification performance. The prepared KAO1@ATPES-QC possessed excellent demulsification efficiency (DE) in a broad pH range, and the DE reached 99.05% with a dosage of 800 mg/L at 25 °C and pH of 8. Temperature has a very limited impact on demulsification efficiency, indicating that the KAO1@ATPES-QC composite can realize quick and high-efficiency demulsification of the crude oil emulsion at an ambient temperature. The demulsification mechanism showed that good interfacial activity, proper surface charged characteristics, and functional groups are essential for constructing clay mineral demulsifiers with excellent demulsification performance.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF PETROLEUM SCIENCE AND ENGINEERING
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2016
·
IF 1.655
Yue Qiao,Jingyi Yang,Hao Cai,Peng Cheng,Xinru Xu
Demulsification of steam-assisted gravity drainage (SAGD)–produced liquid from the Xinjiang oil field was investigated in this study. The heavy crude oil in the produced liquid presents a high density, high viscosity, high resin and asphaltene contents, and high acid value. Thus, this liquid is difficult to separate. The effect of cationic deoiling agents on the separation of the SAGD-produced liquid was tested. W590 showed the highest separation efficiency among the deoiling agents surveyed. Zeta-potential experiments revealed that cationic deoiling agents could neutralize negative charges on the oil droplet surface and significantly reduce the oil content in the separated water. After the produced liquid was settled with 220 mg/L W590 at 90 °C for 1 h, the oil content in the water could be rapidly decreased to 198.0 mg/L and the water content in the produced liquid could be reduced from 86.2% to 22% to obtain a W/O emulsion. In the second process of separation, the demulsifier FC20 was applied. Under an electric field, the water content in the emulsion to which 30% diesel oil had been added could be reduced to 1.0% with 300 mg/L FC20, a 750 V/cm electric field for 20 min, and a settling time at 90 °C for 4 h.
研究领域:
石油工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Yuxuan Tian,Yaming Qi,Hongjing Han,Xinzhan Luo,Junyao Guan,Sijia Chen,Haiying Wang,Yanguang Chen,Xuzhong Gong
Tight oil is an important unconventional oil resource, but it is difficult to separate oil and water from produced liquid and make efficient use of it. Due to the stable structure of oil–water interface caused by resin, it is difficult to achieve demulsification. In this work, a series of polyether ester demulsifierswith different degree of polymerization were designed by esterification and polymerization. In addition, hydrogen peroxide was used to regulate the structure of resin to enhance the transmission of polyether ester, and the replacement of resin was strengthened through the structural design of polyether ester. The results showed that the molecular weight and dipole moment of resin oxidized by hydrogen peroxide decreased, which was beneficial to the transfer of demulsifier. With the increase of polymerization degree, the oil solubility and surface activity of polyether ester were improved, and the replacement ability of resin was strengthened·H 2 O 2 and demulsifier were used to synergistically promote demulsification, the dehydration rate could be further increased to 99.2%, and the water content in tight oil could be reduced to 0.56%.
研究领域:
化学工程
·
石油工程
✓ 已验证
DOI
高影响因子
AICHE JOURNAL
·
2024
·
IF 3.5
Ying Tian,Changqing He,Xincheng Zhang,Lin He,Zhenghe Xu,Hong Sui,Xingang Li
Separating water-in-heavy oil (W/HO) emulsions at low (room) temperature is challenging when exploiting heavy oil. We propose an adaptable strategy for constructing Si/O-doped demulsifiers. A nonionic demulsifier (APBMP) has been synthesized based on polysiloxane modified by allyl polyether and butyl acrylate. APBMP achieves 95.97% dehydration within 5 min for W/HO emulsions at 288.15 K and complete dehydration in 15 min at 323.15 K. Mechanistic studies found that doping Si/O into the demulsifier molecules increases the number of hydrogen bond sites, which enables the demulsifiers to quickly disperse natural stabilizers (e.g., asphaltenes) and replace them at the oil–water interfacial film. The demulsifiers prefer to occupy the interfacial sites rather than dissolve into the bulk oil or water phases. Driven by hydrogen-bond-dominated noncovalent interactions, the oil–water interfacial film is softened, reconstructed, and broken. These findings provide insights into developing novel materials for oil–water separations in a low-carbon way.
研究领域:
化学工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Qian Qu,Yan Hu,Jiahao Xiong,Yu Ding,Yuqi Tang,Lingrui Chen,Yajun Zhao,Yuanzhu Mi
Stabilized water-in-oil emulsions present significant challenges for oil production. However, current demulsifiers often face limitations such as high demulsification temperatures, low efficiencies, and complex synthesis processes, making the resolution of this challenge a demanding task. In this study, we successfully synthesized two ionic liquid demulsifiers, PEDA-Br and GEDA-Br, employing a straightforward two-step procedure. The objective was to enable effective treatment of water-in-oil emulsions at low temperatures with high efficiency. The structure of the demulsifiers was characterized utilizing Fourier-transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance hydrogen spectra ( 1 H NMR). Bottle tests were then conducted to evaluate their demulsification efficiency (DE) in water-in-oil (W/O) emulsions. The results demonstrated that GEDA-Br achieved a DE of 98.92 % at a concentration of 500 mg/L and a temperature of 50 °C after 2 h. Additionally, both PEDA-Br and GEDA-Br exhibited DE values exceeding 95 % at a salinity level of 10,000 mg/L, and both proved effective across a broad pH range of 4 to 12. These findings highlight their robust resistance to high salinity and both acidic and alkaline conditions. The study also examined the demulsification mechanism in terms of interfacial tension (IFT), elastic modulus of the interfacial film, three-phase contact angle (TCA), and microscopic observations. The excellent interfacial activity, ability to reduce interfacial tension, and electrostatic neutralization capability are responsible for its outstanding demulsification performance.
研究领域:
化学工程
·
石油工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）