Foods
·
2022
·Vol. 11
·期 18
·2804
·
IF 5.561
Xiaobo Gu,Xue Zhang,Keqing Wang,Xi Lv,Ruyi Li,Wen Ma
Grape volatile compounds directly determine the aroma quality of wines. Although the aroma profile of grapes evolved greatly at different maturity stages, there were less considerations for aroma status when determining grape harvest time. In the present study, several maturation indicators, namely, sugars/acids ratio, free volatile compounds, bound volatile compounds and IBMP (3-isobutyl-2-methoxypyrazine) content were monitored in four red wine grape varieties (Vitis viniferaL. cv Cabernet Sauvignon, Cabernet Gernischet, Cabernet Franc and Merlot) near harvest time (42 days) in Ningxia, China. The results showed that the highest sugars/acids ratio was reached on day 21 and day 28 for Merlot and the other three varieties, respectively. For both free and bound volatile compounds, the content of carbonyl compounds decreased continuously in the process of ripening. The contents of free alcohols, esters and terpenes increased in the ripening stage and decreased in the stage of over-ripening. The accumulation of favorable bound aroma compounds peaked at day 35. The content of IBMP presenting a green smell in all four varieties descended continuously and kept steady from day 28. Therefore, the present findings revealed that the best aroma maturity time of four studied grape varieties was later than the sugars/acids ratio in Ningxia region. Aroma maturity should be taken into account during harvest time determination.Keywords:wine grape;volatile compounds;aroma maturity;harvest
研究领域:
葡萄栽培学
·
食品科学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Lu Wang,Maozhang Tian,Wenfeng Song,Xinmin Song,Qun Zhang,Hao Shen,Yanyao Shi,Jun Zhang,Jingjie Hou,Saijie Song,Lutao Yang,Weifeng Lv
Problems occurring in oilfields after secondary oil recovery can include low oil content, difficulty in tracing, and high production costs. The use of two-dimensional nanomaterials can improve the efficiency of oil exploration and extraction. In this study, we designed a new nanofluid based on lecithin-modified MXene (lecithin@MXene-COOH) for directional oil extraction and tertiary oil recovery. MXene has good interfacial affinity, and 0.02 % lecithin@MXene-COOH can be effectively enriched at the oil–water interface. The nanofluid based on lecithin@MXene-COOH has excellent emulsifying properties, and we found that the optimal formulation has an emulsifying volume of 12.8 mL. The efficient enrichment of lecithin@MXene-COOH at the oil–water interface means that it can effectively define the position of oil droplets. The lecithin@MXene-COOH nanofluid has excellent oil displacement effect, and can efficiently drive oil, with an improvement of recovery efficiency of up to 15.95 % after the traditional flooding stage. This research has developed a new application of MXene-based nanomaterials, and the lecithin@MXene-COOH nanofluid is predicted to have a successful future in the field of oilfield tracing and extraction.
研究领域:
石油工程
·
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2022
·
IF 5.518
Han Jia,Juan He,Yingbiao Xu,Tingyi Wang,Lingyu Zhang,Bowen Wang,Xincan Jiang,Xu Li,Xingyuan Zhang,Kaihe Lv
The surfactant assisted nanoparticle stabilized emulsions exhibit the wide potential application and attract more and more attention. In the present study, the flake-like hydrophilic AlOOH nanoparticles were employed to stabilize Pickering emulsions with the assist of slightly amphiphilic sodium benzenesulfonate (SBS) molecules. The measurements of FTIR spectra , three-phase contact angle, zeta potential and Z-average diameter adequately testified the successful adsorption of SBS on AlOOH nanoparticles. Both slightly amphiphilic SBS and highly hydrophilic AlOOH nanoparticles could hardly stabilize emulsions, whereas the SBS modified AlOOH nanoparticles exhibited distinguished emulsifying capacity, which was reflected via the Turbiscan Stability Index and the reference values of backscattered light intensity . Batch adsorption experiments were conducted and the adsorption data was better fitted to the Langmuir model, suggesting that SBS could form monolayer adsorption on AlOOH nanoparticles. Confocal laser scanning microscopy and rheological measurements demonstrated that the functionalized AlOOH nanoparticles could spontaneously adsorb at the oil/water interface to form an interfacial film and generate a three-dimensional network structure in the continuous phase to effectively prevent droplet coalescence in normal and harsh conditions. Furthermore, SBS/AlOOH stabilized O/W emulsions presented significant displacement performance (tertiary oil recovery of 18.87%) in core flooding experiments. Microscopic visualization tests showed that the emulsions could block high permeability channels and enlarge the sweep area. This study opens up the possibility of adopting low surface-active molecules and hydrophilic nanoparticles to stabilize Pickering emulsions for enhanced oil recovery (EOR).
研究领域:
石油工程
·
界面化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Energies
·
2019
·Vol. 12
·期 5
·781
·
IF 2.707
Songyan Li,Chenyu Qiao,Guowei Ji,Qun Wang,Lei Tao
Foam is a kind of ideal fluid for profile control in petroleum engineering, which has attracted intense interests of scholars globally in recent years. In this study, a foam system stabilized with anionic surfactants and clay particles was proposed for profile control in reservoirs, and the formulation was optimized experimentally. Moreover, flooding experiments in visible porous media models and in sandpacks were conducted to test the plugging effect of the foam system on reservoirs, and the effects of different factors such as gas–liquid ratio, temperature and permeability on profile control were also evaluated. According to the experimental results, the clay-HY-2 system was elected for its satisfactory foamability, stability, and salinity resistance, and the optimum concentrations of HY-2 and clay particle are 0.6 wt% and 5.0 wt%, respectively. Compared with traditional foam fluids, the clay-HY-2 system can form denser and smaller bubbles in high- and middle-permeable layers, enhancing the plugging effect there, while there are less bubbles in low-permeable layers, i.e., the restriction on the flow in narrow structures is slight. The clay-HY-2 foam can perform the efficient and uniform profile control effect on sandpacks when the foam quality is around 50%. The resistance factor of the foam decrease gradually with the increasing temperature, however, the resistance factor remains higher than 350.0 when the temperature reaches 80.0 °C. When the permeability exceeds 1502.0 mD, the clay-HY-2 foam can perform deep profile control in reservoirs, and the resistance factor are not sensitive to the change of permeability when it exceeds 3038.0 mD. Besides, the site application case shows that the clay-HY-2 foam do have good profile control effect on reservoirs, i.e., improving oil production and declining water cut.Keywords:clay enhanced foam;profile control;enhance oil recovery (EOR);site application
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
GEOFLUIDS
·
2022
·
IF 2.006
Liang Zhang,Fujian Zhou,Guofa Lei,Bingyu Ge,Yuan Li,Guolin Yu,Longhao Zhao,Bojun Li,Erdong Yao
Nanomaterials can be used to emulsify and reduce the fluid viscosity, reduce pore pressure, and increase injection volume. Therefore, nanomaterials have a great potential in the enhanced oil recovery. However, the current research on nanooil flooding materials mostly focuses on the evaluation of the oil-displacing effect, and the lack of research on the size of the oil-displacing materials for tight oil is obvious. In this work, 1T phase molybdenum disulfide nanosheets were prepared by one-step hydrothermal method, which were further modified with CTAB powders to obtain MoS2-CTAB nanosheet powders. Combined with SEM, TEM, and AFM methods, the nanosheets were optimized based on the appearance and morphology. The stability, wetting reversal, and oil displacement capacity of selected nanosheets were tested. The results show that the best experimental condition to synthesize small-sized molybdenum disulfide is 200°C in the weak acid environment through 12 h. Due to the steric hindrance effect of the CATB molecule, the size and interlayer gap of MoS2 nanosheets increased slightly after modification. The layer gap reaches to 0.7 nm, and the number of stacked layers is 3~4 layers. Strong Raman bands are observed at 137 cm-1, 291 cm-1, and 391 cm-1, which indicates that the synthesized product is 1T MoS2. The modified MoS2 nanosheets in aqueous solution have better dispersion than the unmodified one. After the Zeta test, it was found that the absolute value after modification became lower, indicating that the modification of nano-MoS2 was effective. Moreover, the MoS2-CTAB can complete the wetting reversal within 4 h and make the interfacial tension reach 0.89 mN/m at 0.005 wt%, which greatly reduces the capillary pressure. The enhanced oil recovery effect of MoS2-CTAB nanosheets increased by 85.7% compared with that before modification and 62.5% higher compared with pure surfactant.
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
Polymers
·
2022
·Vol. 14
·期 13
·2599
·
IF 4.967
Kaili Liao,Junnan An,Lipei Fu,Houye Zhang,Meng Wei,Jinmei Bai,Yanfeng He
Welan gum is one of the most promising polymers used in polymer flooding for enhancing oil recovery, due to its excellent temperature resistance and salt-tolerance performance. However, welan gum, as a polymer with higher molecular weight, can be adsorbed and detained in the pore throat of the reservoir, which is characterized by a smaller size. Montmorillonite, a kind of clay mineral with high content in reservoir rocks, has strong adsorption capacity. Therefore, the adsorption behavior of welan gum on montmorillonite, as well as its influencing factors, are studied in this paper. The results show that the adsorption capacity is 2.07 mg/g. The adsorption capacity decreased with the increase in temperature. Both acidic and alkaline conditions reduced the adsorption capacity. The existence of inorganic salt affected the adsorption capacity. In addition, the higher the cation value, the lower the adsorption capacity. The characterization tests showed that the adsorption of welan gum on montmorillonite was characterized by physical adsorption and surface adsorption, indicating that there were no changes in the internal structure of montmorillonite. This study provides feasible methods to reduce the amount of welan gum adsorbed on montmorillonite, which is of great significance for reducing the permeability damage caused by welan gum adsorption and promoting the application of welan gum in polymer flooding for enhancing oil recovery.Keywords:welan gum;polymer flooding;enhancing oil recovery;montmorillonite;adsorption
研究领域:
石油工程
·
应用化学
✓ 已验证
DOI
PubMed
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Mingwei Zhao,Ying Li,Caili Dai,Yingpeng Chen,Ziteng Yang,Kaiwen Liu,Zhenfeng Ma
Hydrolyzed polyacrylamide (HPAM) is commonly used in polymer flooding, however, it is prone to viscosity reduction at high temperatures and high salinities, weakening its ability to improve oil recovery. In this work, sulfonated modified silicon quantum dots (S-SiQDs) were synthesized and then added to HPAM to study the improvement of rheological properties and enhanced oil recovery performance of HPAM at high temperatures and salinities. It is found that the S-SiQDs with a concentration of only 0.1 wt % can significantly increase the viscosity of HPAM from 28.5 to 39.6 mPa·s at 60 °C and 10,000 mg/L NaCl. Meanwhile, the HPAM/S-SiQDs hybrid solution always possessed higher viscosity and viscoelastic moduli than HPAM, attributed to the hydrogen bonding between HPAM and S-SiQDs. Notably, HPAM/S-SiQDs still maintained elastic behavior at harsh conditions, indicating that they formed a strong network structure. Through oil displacement experiments, it was found that the oil recovery of HPAM/S-SiQDs was higher (28.3%), while that of HPAM was only 17.2%. Thereafter, the utilization sequence of oil during the displacement process was studied with nuclear magnetic resonance experiments. Ultimately, the oil displacement mechanism of HPAM/S-SiQDs was deeply analyzed, including viscosity thickening and wetting reversal.
研究领域:
石油工程
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Junjie Fan,Jianpeng Cui,Tinglei He,Tianhao Zhang,Xinyu Yuan,Jianwen Hu,Haotian Gao,Hong Zhang,Chunling Li,Songqing Hu,Shuangqing Sun
Carbon dots (CDs), a class of fluorescent nanomaterials distinguished by their unique properties such as tunable surface chemistry and nanoscale dimensions, have garnered significant attention. In this study, we synthesize CDs-based emulsifiers through a combination of hydrothermal synthesis and hydrophobic modification utilizing dynamic covalent imine bonds, imparting them with amphiphilicity and pH-responsiveness. These carbon dot-based emulsifiers stabilize the oil–water interface to form Pickering emulsions and enable the reversible regulation of amphiphilicity through pH-induced cleavage and reformation of imine bonds, thereby facilitating transitions between emulsification and demulsification. Furthermore, the amphiphilic CDs effectively reduce oil–water interfacial tension and exhibit potential application in mobilizing heavy oil in ultra-low permeability reservoirs. Consequently, we observed a 28.78 % decrease in injection pressure and an 18.65 % increase in recovery rates. Experimental and theoretical results reveal that the CDs adsorb onto both solid and oil phase surfaces, modulating the interfacial properties and enabling the oil film attached to the rock wall to be more easily stripped off during water flushing. Additionally, the small size of the CDs allowed them to enter finer pore throats and effectively displace the residual oil film. This unique characteristic holds significant promise for future advancements in the fields of smart-response Pickering emulsions and enhanced oil recovery in ultra-low permeability reservoirs.
研究领域:
材料科学
·
石油工程
·
界面化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Energies
·
2024
·Vol. 18
·期 1
·61
·
IF 3
Haibo He,Jixiang Guo,Bo Wang,Yuzhi Zhang,Fan Lei,Tao Wang,Tiantian Zhang,Jing Wang
To meet the demand for enhanced oil recovery in shale reservoirs and to improve the fluidity of shale oil while strengthening its imbibition effect, a multifunctional, thermally stable nanofluid agent, SDP-3, was synthesized using acrylamide (AM) and 2-acrylamido-2-methylpropanesulfonicacid (AMPS) as the primary raw materials. A series of characterizations and tests were conducted to evaluate its interfacial properties, stability, viscosity reduction performance, wettability, and imbibition-driven oil recovery capabilities. Furthermore, the mechanisms by which SDP-3 enhances the recovery of shale oil were analyzed. The results demonstrated that a mass concentration of 2% SDP-3 could reduce the oil–water interfacial tension to 0.071 mN/m. When the concentration increased to 2.0%, the interfacial tension further decreased to 0.071 mN/m, at which point the viscosity reduction rate for shale oil reached 92.02%, and the imbibition recovery rate was 36.57%. Microscopic observations revealed that SDP-3 could disperse shale oil into fibrous and spherical forms, effectively detaching the adhering shale oil from minute pores. This nanofluid agent not only exhibits excellent compatibility and stability but also achieves an ideal oil recovery effect while significantly improving recovery rates, showcasing its immense application potential in oilfield development.
研究领域:
石油工程
·
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2024
·
IF 3.7
Pingtian Fan,Yuetian Liu,Yuting He,Yuanping Hu,Leihui Chao,Yapeng Wang,Lang Liu,Jingpeng Li
Currently, research surrounding low-salinity water flooding predominantly focuses on medium- to high-permeability sandstone reservoirs. Nevertheless, further investigation is necessary to implement this technique with regard to tight sandstone reservoirs. The present study comprises a series of experiments conducted on the crude oil and core of the Ordos Chang 6 reservoir to investigate the influence of ionic composition on low-salinity water flooding in tight oil reservoirs. The change in wettability on the rock surface was analyzed by using the contact angle experiment. The change in recovery rate was analyzed using a core displacement experiment. The reaction between rock fluids was analyzed using an ion chromatography experiment. Additionally, a nuclear magnetic resonance (NMR) experiment was used to analyze the mobilization law of crude oil and the change in wettability on the scale of the rock core. This led to a comprehensive discussion of the law and mechanism of enhancing the recovery rate via low-salinity water flooding from various perspectives. Experiments show that low-salinity water flooding is an effective technique for enhancing recovery in tight sandstone reservoirs. Altering the ionic composition of injected water can improve the water wettability of the rock surface and enhance recovery. Decreasing the mass concentration of Ca2+ or increasing the mass concentration of SO42– can prompt the ion-exchange reaction on the rock surface and detachment of polar components from the surface. Consequently, the wettability of the rock surface strengthens, augmenting the recovery process. Nuclear magnetic resonance experiments evidence that low-salinity water injection, with ion adjustment, significantly alters the interactions between the rock and fluid in tight sandstone reservoirs. As a result, the T2 signal amplitude decreases significantly, residual oil saturation reduces considerably, and the hydrophilic nature of the rock surface increases.
研究领域:
石油工程
·
地质学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
·
2021
·
IF 6.291
Yan Fu,Quansheng Wang,Liang Zhang,Shuping Ling,Huiyan Jia,Yinliang Wu
The residual behaviors and dietary risk probability of 12 pesticides in Dendrobium officinale Kimura et Migo cultivated at two representative locations under green house conditions were investigated using liquid chromatography-tandem mass spectrometry. Field trials showed that the half-lives of 12 pesticides ranged from 0.9 to 14.4 days in fresh D. officinale stems. Based on maximum residue levels (MRLs), the ultimate residues of imidacloprid, dimethomorph, metalaxyl, tebuconazole, and cyazofamid at a pre-harvest interval (PHI) of 28 days were within acceptable limits. For abamectin, indoxacarb, and difenoconazole, 35-day PHIs were needed. The PHIs of trifloxystrobin and fluopyram were 42 days, the time required for their residues to be reduced to an MRL of 4 mg/kg. The chronic and acute risk quotients of target pesticides at PHIs of 28–42 days were below 5.929% and 0.532%, respectively, showing that the evaluated D. officinale exhibited an acceptably low dietary risk to the general population.
研究领域:
植物学
·
环境科学
·
毒理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Han Jia,Zhe Wang,Xinbo Geng,Rui Sun,Bowen Wang,Xu Li,Xiaolong Wen,Fangning Fan,Shijie Wen,Qiang Wang
Nowadays, the nanoparticles had attracted tremendous attention in enhanced oil recovery (EOR) due to their ultrasmall size, large specific surface area and unique quantum effect. In this research, the amphiphilic silicon quantum dots (SiQDs) were successfully modified by different alkyl chains through the facile process. The SiQDs were characterized by Fourier transform infrared spectrometer (FT-IR), dynamic light scattering (DLS), transmission electron microscopy (TEM), scanning electron microscope (SEM), X-ray diffraction (XRD) and atomic force microscope (AFM). The water contact angle, interfacial tension (IFT) and expansion modulus were measured to evaluate interfacial properties. Compared with the hexyltrimethoxysilane and octyltrimethoxysilane, the propyltrimethoxysilane with short alkyl chain significantly improved the interfacial activity of the SiQDs@C3–0.3 % to reduce the IFT from 51.0 mN/m to 9.8 mN/m. It was found that both the alkyl chain length of the silane coupling agent and its dosage could significantly affect the amphiphilicity of the SiQDs. Moreover, the optical microscopy, the static multiple light scattering and the rheometer were employed to confirm the remarkable stability and the high viscosity of SiQDs@C3–0.3 % stabilized emulsion, which were attributed to the rigid interfacial film and the three-dimensional interparticle network generated by the SiQDs@C3–0.3 %. Finally, the core-flooding experiments suggested the SiQDs@C3–0.3 % stabilized emulsion enhanced oil recovery by 22.1 %.
研究领域:
材料科学
·
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）