CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
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2022
·Vol. 38
·期 4
·1083-1088
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IF 2.726
Xiao Peiwen,Li Hui,Wang Pingmei,Liu Bolun,Jing Wendan,He Lipeng,Wang Runwei,Han Xue,Zhang Zongtao,Qiu Shilun,Luo Jianhui
Herein, we propose a novel approach to reduce the viscosity of heavy oil by functional hierarchical CTMS-ZSM-5-PTMS zeolites. CTMS-ZSM-5-PTMS zeolites synthesized by asymmetric modification and selective alkali etching can reduce the viscosity of heavy oil through adsorbing asphaltenes. This method can reduce the viscosity of heavy oil from hundreds of thousands mPa·s to about ten thousand mPa·s. The work provides an economical and environmentally friendly candidate for heavy oil viscosity reduction under low-temperature conditions.
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 Environmental Chemical Engineering
·
2023
·
IF 7.7
Lei He,Yong Dai,Jingjie Hou,Yanxin Gao,Daishuo Zhang,Juqing Cui,Jun Zhang,Haomiao Zhu,Jian Shen
The high energy consumption drawbacks of thermal recovery of heavy oil are becoming increasingly apparent, contrary to the goal of being green, environmentally friendly and low carbon. In this work, a carrier was designed for the immobilization of Bacillus subtilis using lecithin(PC)-modified magnetized Ti 2 C 3 MXenes (PC- g -Fe 3 O 4 /Ti 2 C 3 ) for heavy oil exploitation, which effectively reduced the chemical oxygen demand (COD) of oilfield wastewater and viscosity of heavy oil. According to orthogonal tests, the ideal temperature for immobilizing Bacillus subtilis was 38 °C, the ideal pH was 7, the desired mineralization was less than 20,000 ppm, the COD removal rate was over 80 %, and the heavy oil's viscosity was reduced by 77.5 %, and the carrier could be recycled and reused. As the results of the displacement experiment showed, the microbial oil drive with the carrier (PC- g -Fe 3 O 4 /Ti 2 C 3 ) could enhance the recovery of heavy oil by 28.39 %, which was due to the reduction of COD and viscosity of the heavy oil in the reinjection water. So, PC- g -Fe 3 O 4 /Ti 2 C 3 has excellent potential for use in the oil field because it is very effective, affordable, and ecologically benign.
研究领域:
环境科学
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石油工程
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微生物学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2024
·
IF 1.9
Xinyuan Li,Meifei Niu,Junjie Zhang,Zhuoping Yu,Jun Xu,Guangyu Sun
Wax precipitation and deposition are challenging hurdles in pipeline transportation of waxy crude oil. This study focuses on transforming SiO2, Laponite, and montmorillonite particles into hydrophobic particles through polymer grafting. Chemical structure analysis and grafting ratio calculation were performed. Through thermogravimetric analyzer (TGA) test, Laponite showed the highest grafting ratio. The effects of adding nanocomposites, TDA-2024-22, and commercial pour point depressants on the rheological behavior and wax crystallization behavior of African crude oil were compared. Addition of the nanocomposite PDA-22@SiO2 to crude oil, reduced the viscosity by 85.6% at 20 °C and the thixotropy by 60.2%. Wax crystal size decreased in the order of PDA-22@SiO2, PDA-22@Laponite, KS-10, TDA2024-22, and PDA-22@MMT. The pour point decreased by 6 °C with PDA-22@ SiO2 particles but only 3 °C with Laponite and montmorillonite composites. Spherical nanocomposites are promising flow improvers for waxy crude oil.
研究领域:
石油工程
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Huimin Zhou,Xueqian Liu,Changqing He,Lin He,Hong Sui
Reduction of heavy oil viscosity could significantly enhance the heavy oil recovery, separate oily sludgy, improve the heavy oil transportation and storage. Herein, with careful characterization and simulation, we found that the intermolecular hydrogen bond at the edge of asphaltenes plays an important role in forming asphaltene aggregates in oil phase, which increases the oil viscosity sharply. To efficiently reduce the viscosity, we synthesized a novel nonionic material with multiple hydrogen bond sites for breaking the asphaltene aggregates. This oil-soluble viscosity reducer (VR-1) was synthesized by the reaction of oleic acid and tetraethylenepentamine, successfully introducing the N and O heteroatoms into the molecules. It is found that, after optimization, the VR-1 could reduce the Tahe heavy oil viscosity (high content of asphaltenes and resins (>41 %)) by over 80.5 % (from 16,772 mPa·s to 3268 mPa·s) at the addition of 3 wt%. The mechanistic study by experimental characterizations and molecular dynamics (MD) simulations show that VR-1 could reduce the particle size of asphaltene aggregates significantly. It is observed that hydrogen bond sites in VR-1 play the key roles in weakening and reconstructing the intermolecular non-covalent interactions between asphaltene molecules, which facilitates the dispersion of asphaltene aggregates. These reconfigurations at the surface of asphaltene molecules by VR-1 finally reduce the oil viscosity. This work provides new insights in developing new materials and strategies for changing oil viscosity in a low carbon way, especially those with high content of asphaltenes and resins.
研究领域:
石油工程
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材料科学
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2023
·
IF 7
Fang Zhang,Lei Wang,Lutao Yang,Yong Dai,Jun Zhang,Lei He,Juqing Cui,Jian Shen,Zhe Wang
Immobilized microbial technology is a simple, cost-effective, and efficient technique to minimize the difficulty and energy consumption of heavy oil extraction, as well as the COD of oilfield wastewater. In this work, PC- g -Mag(Fe-MOF) was prepared to immobilize microorganisms obtained by grafting lecithin after magnetization using Fe-MOF. The orthogonal tests showed that the optimum temperature for immobilized microorganisms was 38 °C, the optimum pH was 7, the optimum inoculum was 7 % and the desired mineralization level was <20,000 ppm. The viscosity of free and immobilized microorganisms decreased by 61.5 % and 76 %. The recovery efficiency of the carrier with two species of bacteria after 5 cycles of experiments was 87.5 % and 73.2 %, respectively. The removal rate of COD in the 5th time was 69.3 %, the viscosity reduction rate of heavy oil was 61.6 %. The recovery efficiency of heavy oil was increased by 25.09 %. Fe-MOF acts as a biocarrier to immobilize bacteria and enhance the metabolic activity of their microbial communities and improves COD removal from oilfield wastewater and viscosity reduction in heavy oil.
研究领域:
环境科学
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微生物学
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2020
·Vol. 10
·期 9
·896
·
IF 2.436
Guoyong Liu,Yuan Yuan,Ruijin Liao,Liang Wang,Xue Gao
A breakdown caused by the icing of power generation infrastructure is one of the serious disasters occurring in the power system. Slippery lubricant-infused porous surfaces (SLIPSs), whose ice adhesion strength is extremely low, have a promising application in the anti-icing field. In the present study, we fabricated SLIPSs with low ice adhesion strength by infusing silicone oil into an anodic aluminum oxide (AAO) substrate. In addition, the effects of the viscosity of silicone oil on the anti-icing properties and durability of the SLIPSs were investigated. The results show that a lower viscosity silicone oil brings about more slippery surfaces and lower ice adhesion strength. The ice adhesion strength was reduced by 99.3% in comparison with the bare Al alloy. However, low-viscosity silicone oil has worse de-icing resistance and heat resistance. Additionally, the porous films filled with low-viscosity silicone oil possess a better self-healing property after icing/de-icing cycles and followed by exposure to the atmosphere. When the viscosity of silicone oil is 50 mPa·s, the SLIPSs exhibit the best durability for anti-icing. Even after 21 de-icing tests or 168 h of heating at 90 °C, the ice adhesion strength still remains below 10% compared with that of bare Al. This work provides some useful advice for the design and fabrication of anti-icing SLIPSs.
研究领域:
材料科学
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表面工程
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能源工程
✓ 已验证
DOI
高影响因子
Journal of Environmental Chemical Engineering
·
2021
·
IF 5.909
Hongyu Zeng,Ping Wang,Lizhu Liang,Hao Hu,Ye Peng,Xuelian Li,Changkun Liu
In recent years, offshore oil leakage incidents have occurred relatively frequently and it has been a challenge to effectively recover the oil due to its high viscosity. Herein, a novel superhydrophobic cotton fabric with a photothermal conversion effect for efficient separation of crude oil was prepared by a facile and inexpensive vapor deposition method. After the cotton fabric adsorbs Fe 3+ ions, stearic acid (SA) with low surface energy is introduced into the fabric. Then the pyrrole monomers were polymerized to polypyrrole (PPy) by Fe 3+ ions through vapor deposition method to obtain a fabric with photothermal properties and superhydrophobicity. The modified fabric showed good abrasion resistance , acid/alkali resistance, and self-cleaning properties. In addition, the modified fabric exhibited excellent photothermal conversion performance, and its surface temperature was able to increase from 30.0 °C to 59.5 °C in 2 min, and reached 68.2 °C in 5 min under simulated sunlight. Finally, three kinds of oil-water separation methods were adopted to separate oil from water with different viscosities, and all of them showed high separation efficiency, with the maximum reaching 99.4%. Under the simulated sunlight, the modified fabric could reduce the crude oil viscosity through photothermal conversion effect, so as to improve the efficiency of selectively absorbing crude oil from water, which increased from 83.2% to 91.8%.
研究领域:
材料科学
·
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
ULTRASONICS SONOCHEMISTRY
·
2020
·
IF 6.513
Xu Li,Chunsheng Pu,Xin Chen,Feifei Huang,Heng Zheng
Water flooding is one of widely used technique to improve oil recovery from conventional reservoirs, but its performance in low-permeability reservoirs is barely satisfactory. Besides adding chemical agents, ultrasonic wave is an effective and environmental-friendly strategy to assist in water flooding for enhanced oil recovery (EOR) in unconventional reservoirs. The acoustic frequency plays a dominating role in the EOR performance of ultrasonic wave and is usually optimized through a series of time-consuming laboratory experiments. Hence, this study proposes an unsupervised learning method to group low-permeability cores in terms of permeability, porosity and wettability. This grouping algorithm succeeds to classify the 100 natural cores adopted in this study into five categories and the water flooding experiment certificates the accuracy and reliability of the clustering results. It is proved that ultrasonic waves can further improve the oil recovery yielded by water-flooding, especially in the oil-wet and weakly water-wet low-permeability cores. Furthermore, we investigated the EOR mechanism of ultrasonic waves in the low-permeability reservoir via scanning electron microscope observation, infrared characterization, interfacial tension and oil viscosity measurement. Although ultrasonic waves cannot ameliorate the components of light oil as dramatically as those of heavy oil, such compound changes still contribute to the oil viscosity and oil-water interfacial tension reductions. More importantly, ultrasonic waves may modify the micromorphology of low-permeability cores and improve the pore connectivity.
研究领域:
石油工程
·
地球物理
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材料科学
·
机器学习
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ENERGY CONVERSION AND MANAGEMENT
·
2022
·
IF 11.533
Zechang Wei,Chenyang Cai,Yu Fu
To reach global carbon neutralization, the use of clean energy and biomaterials has become a trend to reduce CO 2 emission. With the increasing concerns about freshwater shortage and crude oil pollution, water purification and sewage treatment have become particularly urgent. Solar energy is an environment-friendly energy to mitigate freshwater shortage stress and reduce crude oil pollution. However, how to make solar energy applied to effectively drive freshwater generation and crude oil pollution remedy is crucial. Herein, the electrospun membrane was explored as sustainable matrix with desirable solar-to-thermal performance. The strategy of spectrum-tailoring was proposed to tailor bandgap energy of vanadium disulfide (VS 2 ) for photothermal conversion promotion and interfacial evaporation efficiency. Inspired by mussel, dopamine was polymerized on surface of VS 2 (VS 2 @PDA) for spectrum tailoring (Solar absorptance, α, is 89.34 %). Bandgap energy of the complex favorably decreased from 2.06 to 1.41 eV. Combining the dual H-bonding networks, water evaporation enthalpy of the membranes dramatically decreased from 2370 to 1990.2 J/g and the resulted evaporators showed excellent salt resistance, with evaporation rate of 1.40 kg m -2 h −1 (enhancement factor is 2.032) and extraordinary cyclic evaporation performance. Additionally, sunflower-inspired tilting model was architectured to eliminate disturbance of sun irradiation incident angles for effective solar-driven interfacial generation. The resulted membrane effectively treated the seawater and decreased high viscosity of the super-viscous crude oil under the sun irradiation, thus showing great potential in seawater treatment and crude oil pollution remedy. The designs maximized utilization of solar energy and evaporation rates by treating seawater and reducing crude oil pollution without consuming additional energy, thus contributing to carbon neutralization. Therefore, the integration of dual H-bonding networks and spectrum-tailoring strategies would facilitate the structure-functional unification and desirable photothermal capabilities, and bring about an application potential in the development of composite evaporators for carbon neutralization.
研究领域:
材料科学
·
环境科学
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能源科学
·
化学工程
·
可持续技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）