FUEL
·
2020
·
IF 5.578
Gang Chen,Zhichao Zhou,Xiaodan Shi,Xiaolong Zhang,Sanbao Dong,Jie Zhang
Small molecule flow improver for heavy oil recovery has attracted great attention in oilfield chemistry . In this study, 24 alkylbenzenesulfonates were synthesized and evaluated as crude oil flow improvers. The results show that all of the alkylbenzenesulfonates were effective, the chromium alkylbenzenesulfonate (CrDBS) and zinc alkylbenzenesulfonate (ZnDBS) were found to have the best performance with the viscosity reduction rate of higher than 90%. Besides, the CrDBS and ZnDBS can depress the pour point of the crude oil sample by 21.0 °C and 16.0 °C, respectively. The co-crystallization of alkylbenzenesulfonate with the saturated hydrocarbons in the crude oil could disorder the wax crystals and depress the pour point. In addition, DSC was used to reveal the mechanism of viscosity reduction and pour point depressing by alkylbenzenesulfonates. The flow improver can disturb the formation of hydrogen bonds and the π-π interaction bonds among the polycyclic aromatic hydrocarbons and the resin macromolecules . Besides, the field test using ZnDBS confirmed its good performance and promising application potential in enhancing the heavy oil recovery.
研究领域:
石油化学
·
油田开发
✓ 已验证
DOI
高影响因子
Advances in Materials Science and Engineering
·
2021
·
IF 1.726
Feng Zhang,Dong-Sheng Wang,Fan Yang,Tian-Yu Li,Hong-Yan Li,Jian-Guo Cui
Sodium benzenesulfonate was doped into polypyrrole-modified granular activated carbon (pyrrole-FeCl3·(6H2O)-sodium benzenesulfonate-granular activated carbon; PFB-GAC) with the goal of improving the modified GAC’s ability to adsorb sulfate from aqueous solutions. At a GAC dosage of 2.5 g and a pyrrole concentration of 1 mol L−1, the adsorption capacity of PFB-GAC prepared using a pyrrole:FeCl3·(6H2O):sodium benzenesulfonate ratio of 1000 : 1500 : 1 reached 23.05 mg g−1, which was eight times higher than that for GAC and two times higher than that for polypyrrole-modified GAC without sodium benzenesulfonate. Adsorption was favored under acidic conditions and high initial sulfate concentrations. Doping with sodium benzenesulfonate facilitated polymerization to give polypyrrole. Sodium benzenesulfonate introduced more imino groups to the polypyrrole coating, and the N+ sites improved ion exchange of Cl− and SO42− and increased the adsorption capacity of sulfate. Adsorption to the PFB-GAC followed pseudo-second-order kinetics. The adsorption isotherm conformed to the Langmuir model, and adsorption was exothermic. Regeneration using a weak alkali (NH3·H2O), which released OH− slowly, caused less damage to the polypyrrole than using a strong alkali (NaOH) as the regeneration reagent. NH3·H2O at a concentration of 12 mol L−1 (with the same OH− concentration as 2 mol L−1 NaOH) released 85% of the sorbed sulfate in the first adsorption-desorption cycle, and the adsorption capacity remained >6 mg g−1after five adsorption-desorption cycles.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2020
·Vol. 50
·期 2
·715-721
·
IF 4.174
Jianhui Xie,Bing Li,Huijing Liu,Yijun Li,Jian-Bo He,Yanzhen Zheng,Kai-Chung Lau,Tai-Chu Lau
Ferrate(VI), [FeO4]2−, is a very powerful oxidant that can oxidize a wide variety of inorganic and organic compounds. However, the mechanisms of many of these oxidation reactions have not been studied in detail. In this work, we have investigated the kinetics and mechanism of the oxidation of 4-alkylbenzenesulfonates by ferrate in aqueous solutions at pH 7.45–9.63 by UV/Vis spectrophotometry. The reactions are first order with respect to both [ferrate] and [4-alkylbenzenesulfonate]. The second-order rate constants for the oxidation of 4-isopropylbenzenesulfonate by ferrate at 25 °C and I = 0.3 M are found to be (5.86 ± 0.08) × 10−1 M−1 s−1 and (4.11 ± 1.50) × 10−3 M−1 s−1 for [Fe(O)3(OH)]− and [FeO4]2−, respectively, indicating that [Fe(O)3(OH)]− is two orders of magnitude more reactive than [FeO4]2− and is the predominant oxidant in neutral and slightly alkaline solutions. This is further supported by the effect of the ionic strength on the rate constant. No solvent kinetic isotope effect (KIE) was found but a moderate primary KIE = 1.6 ± 0.1 was observed in the oxidation of 4-ethylbenzenesulfonate and 4-ethylbenzenesulfonate-d9. Alkyl radicals were trapped by CBrCl3 in the oxidation of alkylarenes by ferrate. Combined with DFT calculations, a hydrogen atom transfer (HAT) mechanism was proposed for the reactions between [Fe(O)3(OH)]− and 4-alkylbenzenesulfonates.
研究领域:
化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Yikun Zhou,Junhong Ma,Yang Yuan,Chaoyun Ma,Shaorui Jia,Xinbo Zhang,Guirong Zhang,Xuye Zhou
Aqueous zinc-ion batteries (AZIBs) have a great application prospect in large-scale energy storage, but rampant dendrite growth and continuous side reactions cause the deterioration of zinc electrode performance. Herein, a distinctive additive, sodium p-toluene sulfonate (STS) is shown to enable stable and reversible zinc deposition. Both density functional theory (DFT) calculation and experimental observation demonstrate that STS additive not only can modulate solvation structure to reduce the number of active water molecules, but also is preferentially adsorbed on the Zn(101) plane and guide the preferentially growth of the Zn(002) plane. Moreover, the water-poor electric double layer (EDL) formed on the Zn anode and the reduction of pH value of the electrolyte caused by STS have a positive effect on the inhibition of side reactions. Moreover, the formation of hydrophobic layer and the regulation of pH have a positive effect on the inhibition of side reactions. Consequently, the cycle life of corresponding Zn//Zn symmetric battery with STS additive can reach up to 3500 h at 1 mA cm −2 /1 mAh cm −2 , and >900 h at 5 mA cm −2 /5 mAh cm −2 . Moreover, the STS additive endows the Zn//MnO 2 full cell to achieve an excellent capacity retention rate of 78 % over 800 cycles at 1 A g −1 .
研究领域:
电化学
·
能源材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Qun Yuan,Hong-Hua Ge,Jun-Yi Sha,Le-Tian Wang,Chuan Wan,Feng Wang,Kai Wu,Xin-Jing Meng,Yu-Zeng Zhao
The influence of Al 2 O 3 nanoparticles on the corrosion behavior of brass in simulated cooling water (SCW) with or without sodium dodecyl benzene sulfonate (SDBS) was investigated by means of electrochemical impedance spectroscopy , polarization curves, scanning electron microscope, energy spectrum analysis, X-ray diffraction and Fourier transform infrared spectroscopy . Results indicate that the brass suffered severe corrosion in SCW and the SCW-Al 2 O 3 nanofluid. The main corrosion product was Zn 5 (OH) 6 (CO 3 ) 2 . Al 2 O 3 nanoparticles promoted both anodic and cathodic processes in the brass electrode, and dezincification was most serious in the SCW-Al 2 O 3 nanofluid. The adsorption of SDBS on the brass surface was enhanced, and a more compact protective film was formed on the brass surface in the SCW-Al 2 O 3 -SDBS nanofluid. As a result, the corrosion resistance of brass was increased in this medium.
研究领域:
材料科学
·
电化学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 23
·1-12
·
IF 2.8
Tian Lanlan,Hou Ruiting,Wang Shaozheng,Yu Ping,Li Yule,Chen Qingming,Zhang Hui
Perovskite manganite La 1 − x Ca x MnO 3 holds promising for uncooling infrared bolometers and magnetic sensors applications due to its unique properties such as metal insulator transition and colossal magnetoresistance. However, obtaining large temperature coefficient of resistance (TCR) value and magnetoresistance (MR) value in the temperature range close to room temperature remains a huge challenge. The dispersant can improve the agglomeration of particles in the precursor during the preparation of such ceramic materials, so that the uniformity of the samples is higher. In this study, we compare the effects of dispersants sodium dodecylbenzene sulfonate (SDBS) content on the structure, morphology, and electrical transport properties of La 0.67 Ca 0.33 MnO 3 (LCMO). We found that the ceramics with appropriate addition of SDBS possess higher density and larger grain size. Appropriate addition of SDBS can significantly improve the TCR and MR of the ceramics. The peak TCR reached 28.8%·K −1 ( x = 2%), and the peak MR reached 57.6% ( x = 4%). Our findings can promote the potential application of this material in infrared detect and magnetic sensors.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
ENVIRONMENT INTERNATIONAL
·
2019
·
IF 7.943
Yali Shi,Xiaowei Song,Qi Jin,Wenhui Li,Sisi He,Yaqi Cai
The emergence of novel per- and polyfluoroalkyl substances (PFASs) has enabled researchers to determine their bioaccumulation, which is important for understanding their internal doses and environmental risks. Here, for the first time, we report on the occurrence of a novel PFAS, p-perfluorous nonenoxybenzenesulfonate (OBS) in wild crucian carp and explore its tissue distribution and bioaccumulation. The highest levels of OBS were observed in blood (mean/median: 144/133 ng/ml) with the mean tissue/blood ratios (TBRs) consistently below 1, ranging from 0.090 (muscle) to 0.644 (liver). This followed the pattern of perfluorooctane sulfonate (PFOS), implying that their distributions were similar. The calculated tissue-specific LogBAF values, except for muscle, 3.78 (gill)–4.14 (blood) over the regulatory bioaccumulation criterion (Log value: 3.70) indicated its obvious bioaccumulative potency in crucian carp. Molecular docking with estimated binding energies at −8.5 and −9.0 kcal/mol corroborated the strong interactions of OBS with human serum albumin and liver fatty acid binding protein, even though the binding energies were lower than those of PFOS. This, to some extent, explained the lower bioaccumulation of OBS than PFOS. Considering its bioaccumulative potential, large production volume, and wide use, further investigation into the environmental risk and in vivo toxicology of OBS is required.
研究领域:
环境科学
·
毒理学
·
生态学
✓ 已验证
DOI
PubMed
高影响因子
Solar RRL
·
2020
·Vol. 4
·期 6
·2000113
·
IF 7.527
Mengmeng Zhang,Wanpei Hu,Yanbo Shang,Weiran Zhou,Wenfeng Zhang,Shangfeng Yang
Ionic defects at the surfaces of organolead halide perovskite films are detrimental to both the efficiency and stability of perovskite solar cells (PSCs). Herein, sodium p -toluenesulfonate (STS) is applied during the surface modification of perovskite layer for the first time, leading to the efficient surface passivation of the perovskite film and consequently significant enhancements in both efficiency and stability of mixed-cation PSC devices. Upon incorporating STS atop the perovskite layer, the power conversion efficiency of the Cs 0.05 MA 0.12 FA 0.83 PbI 2.55 Br 0.45 (abbreviated as CsMAFA) mesoporous-structure mixed-cation PSC devices improves from 18.70% to 20.05% with reduced hysteresis. The sulfonate (–SO 3 − ) anion of STS coordinates with the Pb 2+ of CsMAFA perovskite, and the Na + cation of STS electrostatically interacts with the anions (I − /Br − ) of CsMAFA perovskite, resulting in the surface passivation of the CsMAFA perovskite film with reduced electron and hole trap state densities. In addition, STS modification induces an upshift of the valence band of perovskite, facilitating hole extraction from the perovskite layer to the hole transport layer with suppressed interfacial charge recombination. Moreover, such a trap state passivation of perovskite film leads to improvement of the ambient stability of PSC devices.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2018
·
IF 1.454
R. X. Niu,J. Y. He,B. Long,D. Q. Wang,H. Song,C. Wang,G. M. Qu
Nonylphenol dodecyl sulfonate (C12NPAS) has been synthesized, and mixed with heavy alkyl benzene sulfonates (HABS) in different proportions. The effects of different mixing ratios on properties such as adsorption, wetting, foaming, and emulsification, of the C12NPAS/HABS surfactant mixtures have been systematically investigated. Experimental results have shown that, after mixing, the wetting and foaming properties of C12NPAS/HABS are improved remarkably. Compared with C12NPAS and HABS alone, the adsorption and emulsifying properties of C12NPAS/HABS are far superior, which we attribute to a synergistic effect between these surfactants.
研究领域:
化学
·
表面科学
✓ 已验证
产品关联
DOI
高影响因子
TENSIDE SURFACTANTS DETERGENTS
·
2022
·Vol. 59
·期 1
·39-50
·
IF 1.058
Fuwen Tan,Xu Li,Jinxiang Dong
Fischer-Tropsch syncrude prepared via the Fischer-Tropsch synthesis (FTS) using a Fe-based catalyst is featured by its high content of linear α-olefins (C 5 –C 13 ). The utilization of C 6 –C 8 α-olefins for the synthesis of alkyl benzene sulfonate surfactants was performed in the present work via dimerization, benzene alkylation, and sulfonation. The effects of the reaction conditions on benzene alkylation over a trimethyl amine hydrochloride-acidic anhydrous aluminum chloride ionic liquid catalyst (Et 3 NHCl-AlCl 3 ) have been studied in detail using C 6 α-olefin dimers as a model alkylation agent. Under the optimal reaction conditions (molar ratio of AlCl 3 to Et 3 NHCl = 2, catalyst loading = 0.29 mol %, reaction temperature = 30 °C, and molar ratio of benzene to C 6 α-olefin dimer = 10) the conversion of the C 6 α-olefin dimer was 100% and the selectivity toward the mono alkylbenzene product was 91.0%. C 6 –C 8 α-olefin dimer alkylbenzene sulfonates (C 6 –C 8 DBS) were synthesized via sulfonation using chlorosulfonic acid and characterized using Fourier Transform Infrared (FT-IR) spectroscopy and Liquid Chromatography–Mass Spectrometry (LC–MS). The surfactant properties of the C 6 –C 8 DBS, including their equilibrium and dynamic surface tension, foaming, wetting and emulsifying capabilities, were closely explored and compared with a commercial linear alkylbenzene sulfonate (LAS). The limiting surface tension ( γ
CMC = 34.62 mN m −1 ) and critical micelle concentration (CMC = 2.15 mmol L −1 ) of C 6 α-olefin dimer alkylbenzene sulfonate (C 6 -DBS) were similar to those of LAS. Upon increasing the hydrocarbon chain length, the γ
CMC of C 6 -DBS, C 7 -DBS, and C 8 -DBS remained unchanged, while the CMC decreased. C 6 –C 8 -DBS exhibited foaming, emulsifying, and wetting properties comparable to LAS.
研究领域:
化学工程
·
材料科学
·
表面化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2020
·
IF 1.701
Yulian Jiang,Changming Zhao,Yue Wang,Tiexin Cheng,Guangdong Zhou
The interfacial properties of sodium para-dimethyl alkylbenzene sulfonate surfactant p-S14-41 (formula is C22H37SO3Na) at the oil-water interface in the presence of monovalent metal counterions (Li+, Na+, K+ and Cs+) are investigated by the spinning drop tensiometry. In the presence of monovalent metal counterions (Na+, K+ and Cs+), the interfacial tension (IFT) of oil-water first decreases and then increases with the increase of counterion concentration, while for Li+ concentration in the studied concentration range, the IFT decreases continuously. The reason why the latter (Li+) does not appear the optimum salinity is that the salt concentration is not high enough. The most noteworthy feature is that not only the different counterions affect differently the optimum salinity but also the concentration of p-S14-4 in the studied concentration range for the same counterion has no effect on the optimum salinity. Besides, the optimum salinity is affected by the electrostatic interaction, water-oil ratio (WOR), salting-out effect, and the hydrated radius of counterion, under the synergistic effect of which, the optimum salinity value order under various monovalent metal counterions is as follows: Li+ > Na+ > Cs+ > K+. The influence mechanism of counterions on the adsorption of p-S14-4 at the oil-water interface is also discussed in detail.
研究领域:
表面化学
·
胶体科学
✓ 已验证
产品关联
DOI
高影响因子
WATER RESEARCH
·
2022
·
IF 13.4
Lingyue Zhang,Chu Tang,Mingchun Li,Huijing Wang,Sijia Zhang,Jianchao Wang,Xinwei Dong,Ding Fang,Hao Bai,Yue Sun,Dongbei Yue
Serious foaming problems and the excessive consumption of defoamer have undoubtedly become one of the most critical problems that hinder municipal solid waste (MSW) leachate treatment efficiency and industry development. Since there is limited research penetrating the foaming mechanism and identification of the key surfactants, current defoaming and surfactant removal techniques lack pertinence and orientation. In this study, a foaming characterization device was developed and ultra-performance liquid chromatography-tandem mass spectrometry (UPLC/MS/MS) was optimized to accurately identify the key surfactants affecting leachate foaming and offer a glimpse into their interaction mechanisms. This study collected leachate samples from 9 typical landfills and waste-to-energy facilities of various waste compositions, climatic conditions, ages, and geographical locations. The foaming problem of leachate was mainly centered on raw leachate and nanofiltration membrane concentrate (NFC). Fresh leachate performed with relatively low foaming capacity and foam stability, associated with low surfactant concentration. The pH value of the system was positively correlated with the concentration of anionic surfactants, indicating significant impacts on surfactant release in MSW. Since the distribution characteristics of linear alkylbenzene sulfonate (LAS) in leachate were consistent with the variety of foaming performances, LAS proved to be an indispensable surfactant in the leachate involved in this study, and its content proportion escalated to 92.87% in aged leachate.
研究领域:
环境科学
·
废弃物管理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）