Canadian Journal of Chemistry
·
2023
·Vol. 101
·期 6
·
IF 1.1
Langman Xing,Hongping Quan,Jinyang Zhao,Xiaomei Huang
The viscosity of the heavy oil was closely correlated with its own resin content by comparing three types of crude oil. In this paper, two novel viscosity reducers with characteristic groups in molecular structures were synthesized for Xinjiang heavy oil, namely viscosity reducer 1 (VR-1) and viscosity reducer 2 (VR-2), both of them showed the better viscosity reduction effect on Xinjiang heavy oil and VR-2 was better than VR-1. The measurement results of ultraviolet-visible spectrophotometer and scanning electron microscope showed that the VR-2 had better separation effect for resin than the VR-1. By analyzing the infrared spectrum results of resin molecule, it could be seen that the resin molecule contained more heteroatoms, which could more easily form the stronger hydrogen bonding with VR-2 with more polar groups to result the better resin dispersion effect. Hence, the phenomenon that VR-1 was not as good as VR-2 in improving fluidity of Xinjiang heavy oil was explained.
研究领域:
石油化学
·
分子生物学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Boliang Li,Yigang Liu,Binfei Li,Junhao Zhang,Jiqian Wang,Yongming Chai,Jun Nan,Xianwei Fu,Zhaomin Li
The high activation temperature of catalysts and the difficulty of their dispersion in the formation are the main obstacles preventing the widespread application of catalytic hydrothermal cracking technology for heavy oil development. However, the "dual in-situ" strategy, which involves the in-situ generation of catalysts to achieve in-situ upgrading of heavy oil, holds promise as an ideal solution to overcome these challenges. Herein, a catalyst precursor suitable for the "dual in-situ" strategy was synthesized, and targeted decomposition experiments were conducted in both steam and oil-water environments typical of heavy oil thermal recovery. Additionally, oil displacement experiments in porous media were carried out, revealing the advantages and characteristics of this innovative oil displacement method in terms of heat transfer efficiency, oil displacement dynamics, and upgrading effects. The results showed that the final decomposition products of the synthesized cetyltrimethyl ammonium heptamolybdate in both steam and oil-water environments were catalytically active MoS 2 . In the oil-water environment, due to solvent and interfacial effects, MoS 3 could be converted to MoS 2 at 180–200°C, which was about 130°C lower than in a nitrogen or steam atmosphere, fully meeting the conditions for integration with heavy oil thermal recovery. Furthermore, the presence of organic groups significantly enhanced the adsorption properties of the MoS 2 generated from cetyltrimethyl ammonium heptamolybdate, with specific surface area and pore volume increasing by 110 m²/g and 0.04 cm³ /g, respectively. In the oil displacement experiments, the oil recovery after using cetyltrimethyl ammonium heptamolybdate increased by 10.3 % compared to steam flooding, and by 3.8 % compared to the direct injection of MoS 2 NPs. The in-situ generation of the catalyst resulted in reduced agglomeration and deposition, leading to significantly improved mobility and sweep efficiency. Consequently, this approach not only enhanced the upgrading and production of heavy oil but also greatly extended the durability of the effect.
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
EUROPEAN POLYMER JOURNAL
·
2022
·
IF 5.546
Mifa Chen,Wuhua Chen,Yefei Wang,Mingchen Ding,Zhenyu Zhang,Dongdong Liu,Dihao Mao
With the gradual exploitation and consumption of conventional petroleum resources, heavy oil is considered as one of the alternative resources for energy supply. The key to the development of heavy oil is to reduce its viscosity. Herein, an amphiphilic polymer named PTVR was synthesized, which showed satisfactory viscosity reduction and recovery of heavy oil. The PTVR was copolymerized by acrylamide (AM), sodium p-styrenesulfonate (SSS) and two functional monomers lauryl methacrylate (LMA) and methyl-2-urea-4[1H]-pyrimidinone (MAUPy). P(AMS), P(ALS) with only one functional monomer, and P(AS) without functional monomer were also synthesized in order to study the effect of functional monomer on polymer properties. The structure of PTVR was identified by 1 H NMR, FT-IR, and TGA. The wettability, interfacial activity between heavy oil and PTVR, and viscosity reduction of heavy oil by PTVR were studied and compared with other three polymers. The results show that PTVR has more excellent properties. This is benefit by the synergistic effect of functional monomers MAUPy and LMA. MAUPy is a typical quadruple hydrogen-bonded monomer. It has the ability to insert into the lamellar aggregates of asphaltenes or resins, weakening or reorganizing the original hydrogen bond interaction. The LMA with long alkyl chain increases the affinity between polymer and heavy oil, which makes the polymer easier to emulsify heavy oil. The viscosity reduction rate of PTVR for heavy oil reached 92.4%, while P(AMS), P(ALS) and P(AS) were 82.8%, 80.7% and 67.2%, respectively. Furthermore, the sand-pack flooding experiment also confirmed that PTVR increased the recovery rate of heavy oil by 14.9%, while the control group was 11.7%, 10.7% and 8.6%, respectively. The application of the amphiphilic polymer PTVR has theoretical significance for enhancing heavy oil recovery.
研究领域:
石油工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
PETROLEUM SCIENCE AND TECHNOLOGY
·
2021
·
IF 1.268
Yongtao Sun,Zhaomin Li,Yubao Sun,ShaoHua Wang
This paper reports the synthesis of AEC-9Na and its effects as an emulsifier on viscosity reduction of heavy oils. Williamson reaction was employed to obtain the emulsifier and its thermal stability was evaluated. The results showed that AEC-9Na can withstand a temperature of 300 °C, the viscosity reduction rate can reach greater than 99%, and it has high stability to calcium and magnesium salts. The interfacial tension of AEC-9Na on heavy oil reached 10−1 level. Compared with the steam flooding, the flooding efficiency with the addition of 1.0% AEC-9Na was increased by 4.8%. The samples were examined microscopically and self-emulsification occurred.
研究领域:
石油工程
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化学工程
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2018
·
IF 4.908
Hongping Quan,Langman Xing
A series of chemical products with characteristic groups in molecular structures were synthesized as novel flow improvers (FIs) for heavy asphaltenic crude oil. The rheological measurement results showed that the FI-5 could behave the better performance in improving fluidity of heavy oil than FI-2 due to the former could form stronger hydrogen bonds with asphaltene in oil, which was confirmed through Fourier transform infrared spectroscopy (FTIR) and energy of simulating studies. Furthermore, X-ray diffraction (XRD) analysis results demonstrated that two products altered asphaltene structure at different degree through hydrogen bonding interaction, and the aggregation-dispersion effect of FIs on asphaltene were respectively obtained through scanning electron microscope (SEM), which beneficially weakened the stable structure of asphaltene in the heavy crude oil system . Hence, the mechanisms were tried to propose that could explain the phenomenon in rheological measurement why FI-2 was not as good as FI-5 in improving fluidity of heavy oil. Results also indicated that the asphaltene content and aggregation structure in oils were vital parameters for its viscosity.
研究领域:
石油化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2022
·Vol. 38
·期 4
·1083-1088
·
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
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Petroleum Science
·
2025
·
IF 6.1
Chi Li,Ji-Xiang Guo,Li Wang,Wen-Long Zhang,Peng-Cheng Xue,Chen-Hao Gao
China possesses abundant heavy oil resources, yet faces challenges such as high viscosity, underdeveloped production technologies, and elevated development cost. Although the in-situ catalytic viscosity-reduction technology can address certain technical, environmental, and cost problems during the extraction process, the catalysts often suffer from poor stability and low catalytic efficiency. In this study, a green and simple room-temperature stirring method was employed to synthesize a class of highly efficient and stable 2D MOF catalysts, which possess the capability to conduct in-situ catalytic pyrolysis of heavy oil and reduce the viscosity. Under the condition of 160 °C, a catalyst concentration of 0.5 wt%, and a hydrogen donor (tetralin) concentration of 2 wt%, the viscosity-reduction rate of Fe-MOF is as high as 89.09%, and it can decrease the asphaltene content by 8.42%. In addition, through the structural identification and analysis of crude oil asphaltenes, the causes for the high viscosity of heavy oil are explained at the molecular level. Through the analysis of catalytic products and molecular dynamics simulation, the catalytic mechanism is studied. It is discovered that Fe-MOF can interact with heavy oil macromolecules via coordination and pore-channel effects, facilitating their cracking and dispersal. Furthermore, synergistic interactions between Fe-MOF and the hydrogen donor facilitates hydrogenation reactions and enhances the viscosity-reducing effect. This study provides a novel strategy for boosting heavy oil recovery and underscores the potential of 2D MOFs in catalytic pyrolysis applications.
研究领域:
石油工程
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Dongxu Zhang,Xin Wang,Cheng Liu,Lechun Song,Huiyuan Li,Qiyu Huang,Jianfeng Zhang
Hydrate formation is one of the major flow assurance issues for the subsea multiphase pipelines. The effects of the interaction between heavy fractions of crude oil components on hydrate behaviors are still not well understood. In this study, the effects of resins on hydrate formation behaviors in asphaltene-containing emulsions were investigated using a high-pressure reactor apparatus. The results indicated that both resins and asphaltenes inhibited hydrate nucleation and increased the induction time. Furthermore, considerable synergistic effects of asphaltenes and resins on the hydrate formation behaviors were discovered in the water-in-oil emulsions, depending on the aggregation state of asphaltenes. The addition of resins was observed to disperse the asphaltene aggregates significantly and enhance the inhibitory effect of asphaltenes on hydrate nucleation. Additionally, the calculated results of gas consumption showed that the presence of resins can decrease the growth rate of hydrates in the asphaltene-containing emulsions. A potential mechanism was presented to illustrate how resins affect hydrate formation in an emulsion with varying asphaltene aggregation states. These findings offer a better knowledge of the synergistic effects between the heavy components of resins and asphaltenes and have potential application in the hydrate management of crude oil pipelines.
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
Arabian Journal of Chemistry
·
2022
·
IF 6.212
Jinjian Hou,Fei Song,Xinyu Ji,Shuanglong Lin
The oily sludge would cause environment pollution, and would cause the heavy oil waste. Therefore, it was vital for us to find novel methods to obtain heavy oil from the oily sludges. In this study, the [C 12 mim][PF 6 ] and [C 12 mim][Br] ionic liquids(ILs) were used to enhance the oil recovery. The toluene could obtain the highest oil recovery, and both the two ILs could increase the oil recovery. Toluene could obtain the highest oil recovery (89.4 wt%), and n -octane could obtain the lowest oil recovery (76.8 wt%). [C 12 mim] [PF 6 ] could efficiently increase the heavy oil recovery to 91.2 wt%(by toluene). The [C 12 mim][Br] could increase the heavy oil recovery further. Both the [C 12 mim] [PF 6 ] and the [C 12 mim][Br] ionic liquids could increase the heavy ois C/H ratio, decrease heavy oil viscosity and increase the sands hydrophilicity. The [C 12 mim][Br] ionic liquids showed better effect. In addition, the ionic liquids could increase the solvents recovery, and the ionic liquids recovery were high. Therefore, the ionic liquids enhanced oil recovery could be recycled to ten times. The two ionic liquids could effectively decrease the heavy oil interaction force, and when the ionic liquids increased to 200 ppm, the force remained stable. In the end, the ionic liquids enhancing solvent extraction mechanism was put forward.
研究领域:
环境科学
·
化学工程
✓ 已验证
DOI
高影响因子
CATALYSIS COMMUNICATIONS
·
2020
·
IF 3.612
Shanqing Yu,Jiasong Yan,Wei Lin,Jiexiao Zhang,Jun Long
Zirconium-modified Y zeolites (ZrUSY) were prepared by impregnation of the zeolite with anhydrous-ethanol and aqueous ion exchange methods. The ZrUSY samples were characterized by powder X-ray diffraction, nitrogen physisorption, and Fourier transform infrared spectroscopy. The results indicated that ZrUSY prepared by the impregnation with anhydrous-ethanol method showed higher crystallinity, specific surface area and hydrothermal stability. The incorporation of Zr into other Y zeolites leads to an increase of the Brønsted acid site concentration and a decrease of the Lewis acid site concentration compared to the ultra-stable Y zeolite (USY). The ZrUSY was much more favorable towards heavy oil FCC conversion with decreasing coke yield and improving olefins selectivity.
研究领域:
催化化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2020
·
IF 5.578
Ruonan Zheng,Dong Liu,Junshi Tang,Qiang Song,Qiang Yao
Coke formation during the process of in-situ combustion is affected by clay minerals, among which montmorillonite shows the most significant effect. A fixed-bed reactor was used to conduct the thermal conversion experiments of heavy oil and model compounds to reveal the mechanism of montmorillonite affecting the coke formation. Under the inert atmosphere, in the presence of montmorillonite, the temperature at which aromatic C–C groups of coke appeared decreased from 500 °C to 450 °C and polymers were formed when toluene was heated, indicating that montmorillonite catalyzed aromatization and polymerization, respectively. The increase in the supporter surface area promoted the formation of coke from pyrolysis by shortening the induction of coking. Under the oxidizing atmosphere, in the presence of montmorillonite, the initial temperature of O 2 consumed by heavy oil decreased from 270 °C to 250 °C, indicating that montmorillonite catalyzed oxygen-adding reaction. The temperature of CO x released by acetaldehyde and acetic acid decreased, and the release amounts increased, indicating that montmorillonite catalyzed decarbonylation and decarboxylation. Polymers were formed when acetaldehyde, acetic acid, ethanol, and acetone were heated, indicating that montmorillonite catalyzed polycondensation. When the oil mass fraction in the sample was within 18%, further increase in the supporter surface area did not affect the formation of coke from oxidation. The catalysis of montmorillonite was the main mechanism affecting coke formation during the thermal conversion of heavy oil under the inert and oxidizing atmospheres.
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
ENERGY & FUELS
·
2024
·
IF 5.2
Jie Yu,Hongping Quan,Jia Xiao,Jingran Wang,Lilong Zhang,Xueshuo Chang,Shuaibin Peng,Jinyu Wang,Zhiyu Huang
Based on dispersing the stacking structure of asphaltenes and inhibiting the reaggregation of asphaltenes, functional chitosan oligosaccharide (COS) derivatives were prepared using COS in this study. Driven by the conjugated intercalation of aromatic rings, COS derivatives could move among the lamellae of asphaltene stacked structures. The effect of COS derivatives on asphaltene aggregates for face-to-face stacking and the inner diameter of the aromatic sheet was characterized by X-ray diffraction and Raman. The microstructure of asphaltene in this mode of interaction could be observed by field emission scanning electron microscopy and high-resolution transmission electron microscopy. The effect of COS derivatives on the stacking structure and aggregation behavior of asphaltenes could enhance the fluidity of heavy oil, resulting in a change in the viscosity-temperature curve of heavy oil. This demonstrates the enormous research value of COS derivatives in the extraction and transportation of heavy oil.
研究领域:
石油化学
·
材料科学
·
生物学
✓ 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）