Sulfolane

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Hwayong Kim - One of the best experts on this subject based on the ideXlab platform.

Sungjin Lee - One of the best experts on this subject based on the ideXlab platform.

Jian Chen - One of the best experts on this subject based on the ideXlab platform.

  • co2 absorption using biphasic solvent blends of diethylenetriamine Sulfolane and water
    International Journal of Greenhouse Gas Control, 2016
    Co-Authors: Weiliang Luo, Dongfang Guo, Jinhong Zheng, Shiwang Gao, Jian Chen
    Abstract:

    Abstract We report a new cyclic process using a biphasic solvent as a potential technology for energy conservation during CO 2 capture. In this work, a biphasic solvent comprising diethylenetriamine (DETA), Sulfolane, and H 2 O was used. The solubility of CO 2 in the blends of DETA-Sulfolane-H 2 O was measured at different temperatures (313.2–393.2 K) and CO 2 partial pressures (up to 400 kPa). Distributions of components at different CO 2 loadings were analyzed for both phases by total organic carbon and elemental analyses. The results indicate that DETA and CO 2 were concentrated in the upper phase and Sulfolane stayed mostly in the lower phase. The separation of the biphasic system was due to the limited solubility of the carbamate, dicarbamate, and tricarbamate products that formed when DETA reacted with CO 2 in Sulfolane. A biphasic cyclic process with a blend of 20% DETA + 40% Sulfolane + 40% H 2 O in absorption, and then, 60% of a blend with 30% DETA + 10% Sulfolane + 60% H 2 O regenerated in desorption was established. The cyclic loading of the new process was 35% higher than that of 30% monoethanolamine (MEA) aqueous solution.

  • Liquid−Liquid Equilibria of Quaternary and Quinary Systems Including Sulfolane at 298.15 K
    Journal of Chemical & Engineering Data, 2001
    Co-Authors: Jian Chen, And Weiyang Fei
    Abstract:

    Liquid−liquid equilibria (LLE) were measured at 298.15 K for three quaternary systemshexane + heptane + toluene + Sulfolane, heptane + octane + m-xylene + Sulfolane, and heptane + benzene + toluene + Sulfolaneand for two quinary systemshexane + heptane + toluene + m-xylene + Sulfolane and heptane + octane + benzene + m-xylene + Sulfolane. The equilibrium data of these systems are compared with those predicted using the nonrandom two-liquid (NRTL) model with parameters fitted from ternary LLE data. The predicted data are in good agreement with experimental ones.

  • liquid liquid equilibria of quaternary and quinary systems including Sulfolane at 298 15 k
    Journal of Chemical & Engineering Data, 2001
    Co-Authors: Jian Chen, And Weiyang Fei
    Abstract:

    Liquid−liquid equilibria (LLE) were measured at 298.15 K for three quaternary systemshexane + heptane + toluene + Sulfolane, heptane + octane + m-xylene + Sulfolane, and heptane + benzene + toluene + Sulfolaneand for two quinary systemshexane + heptane + toluene + m-xylene + Sulfolane and heptane + octane + benzene + m-xylene + Sulfolane. The equilibrium data of these systems are compared with those predicted using the nonrandom two-liquid (NRTL) model with parameters fitted from ternary LLE data. The predicted data are in good agreement with experimental ones.

  • liquid liquid equilibria of multi component systems including n hexane n octane benzene toluene xylene and Sulfolane at 298 15 k and atmospheric pressure
    Fluid Phase Equilibria, 2000
    Co-Authors: Jian Chen, Jianguo Mi, Liping Duan, Zongcheng Li
    Abstract:

    Abstract Liquid–liquid equilibrium (LLE) data were measured at 298.15 K and atmospheric pressure for six ternary systems: n- hexane + benzene + Sulfolane ,n- hexane + toluene + Sulfolane ,n- hexane + xylene + Sulfolane ,n- octane + benzene + Sulfolane ,n- octane + toluene + Sulfolane ,n- octane + xylene + Sulfolane ; three quaternary systems :n- hexane +n- octane + benzene + Sulfolane ,n- hexane + benzene + toluene + Sulfolane and n- octane + toluene + xylene + Sulfolane ; one quinary system :n- hexane +n- octane + benzene + toluene + Sulfolane . The equilibrium data of ternary systems were used to regress interaction parameters in non-random two-liquid (NRTL) equation. These parameters were directly used to predict equilibrium data of quaternary and quinary systems. The predicted data are in good agreement with experimental data.

  • liquid liquid equilibria of ternary and quaternary systems including cyclohexane 1 heptene benzene toluene and Sulfolane at 298 15 k
    Journal of Chemical & Engineering Data, 2000
    Co-Authors: Jian Chen, Liping Duan
    Abstract:

    Liquid−liquid equilibria (LLE) were measured at 298.15 K for six ternary systemsheptane + toluene + Sulfolane, heptane + m-xylene + Sulfolane, cyclohexane + benzene + Sulfolane, cyclohexane + toluene + Sulfolane, 1-heptene + benzene + Sulfolane, and 1-heptene + toluene + Sulfolaneand for two quaternary systemscyclohexane + 1-heptene + benzene + Sulfolane and cyclohexane + 1-heptene + toluene + Sulfolane. LLE data of two systems including heptane are compared with the results of Cassell et al. (J. Chem. Eng. Data 1989, 34, 434−438). The equilibrium data of four ternary systems including cyclohexane and 1-heptene were used to regress interaction parameters in a nonrandom two-liquid (NRTL) model. These parameters were used to predict equilibrium data of the quaternary systems. The predicted data are in good agreement with experimental ones.

Gopal Achari - One of the best experts on this subject based on the ideXlab platform.

  • Enhancement of LED based photocatalytic degradation of Sulfolane by integration with oxidants and nanomaterials.
    Chemosphere, 2020
    Co-Authors: Sripriya Dharwadkar, Gopal Achari
    Abstract:

    Abstract In this study, oxidants and nanomaterials were used to improve titanium dioxide based photocatalytic degradation of Sulfolane. Hydrogen peroxide (H2O2), sodium persulfate (SPS) and ozone (O3) were the oxidants studied and carbon nanotubes (CNT) and nanosized zero valent iron (nZVI) were used as the nanomaterials. The impact of these oxidants and nanomaterials was evaluated at various dosages in both Milli-Q water and groundwater. The results indicate that with a suitable dose of oxidants or nanomaterials, photocatalytic degradation of Sulfolane in Milli-Q water can be enhanced. The addition of ozone contributed to a significant increase in Sulfolane degradation rate in Milli-Q water. The experiments conducted in groundwater showed that oxidants (H2O2, SPS and O3) increased the degradation of Sulfolane while the nanomaterials (CNT and nZVI) impeded Sulfolane degradation in groundwater.

  • integration of aerobic granulation and uv h2o2 processes in a continuous flow system for the degradation of Sulfolane in contaminated water
    Environmental Science: Water Research & Technology, 2020
    Co-Authors: Muhammad Faizan Khan, Jordan Hollman, Joohwa Tay, Gopal Achari
    Abstract:

    Sulfolane contamination has increasingly become a major environmental concern around the world with emerging reports of groundwater, drinking water wells and soil contamination. In this study, a novel approach of integrating aerobic granulation technology with UV/H2O2 process in a continuous flow-through operation sequence was investigated to remediate Sulfolane contaminated waters. The new hybrid technology was able to eliminate more than 99.99% of Sulfolane in less than 6.3 h of combined retention time. The degradation kinetics of Sulfolane were evaluated in batch and continuous flow operation which showed zero and first order for aerobic granulation and UV/H2O2 processes, respectively. In addition, the flow-through system was able to generate and maintain a healthy aerobic granular system characterized by a stable MLVSS/MLSS ratio as well as elemental and bacterial community compositions within the granules. H2O2 concentration was a crucial element for Sulfolane degradation in UV/H2O2 process and various key factors were also identified that govern residual H2O2 concentration in UV/H2O2 effluents.

  • A Field Pilot Study on Treating Groundwater Contaminated with Sulfolane Using UV/H2O2
    Water, 2020
    Co-Authors: Sobhan Iranmanesh, Ian Keir, Gopal Achari
    Abstract:

    Sulfolane is an emerging contaminant in the groundwater and soil nearby gas plants, which has attracted much attention from many researchers and regulatory agencies in the past ten years. In this paper, a field pilot-scale ultraviolet (UV)/hydrogen peroxide (H2O2) system was investigated for treating Sulfolane contaminated groundwater. Different groundwater, as well as different operational parameters such as influent Sulfolane concentration, H2O2 dosage, and water flow rates, were studied. The results showed that a pilot-scale UV/H2O2 system can successfully treat Sulfolane contaminated groundwater in the field, although the presence of iron and other groundwater limited the process efficiency. The lowest electrical energy per order of reduction for treating Sulfolane in groundwater by using the pilot-scale UV/H2O2 system was 1.4 kWh m−3 order−1. The investigated Sulfolane initial concentrations and the water flow rates did not impact the Sulfolane degradation. The enhancement of Sulfolane degradation in an open reservoir by adding ozone was not observed in this study. Furthermore, an operational cost model was formulated to optimize the dosage of H2O2, and a stepwise procedure was developed to determine the power necessary of the UV unit.

  • Advanced Oxidation Based Treatment of Soil Wash Water Contaminated with Sulfolane
    Water, 2019
    Co-Authors: Mariana Brandão, Carlos Garcia, Gopal Achari
    Abstract:

    This study investigates advanced oxidation processes (AOPs) as post-treatment techniques to degrade Sulfolane in soil washing water. Soil washing experiments were conducted with different soil/water ratios, shaking times, and number of extraction cycles. The soil wash water containing Sulfolane was treated with four AOPs including H2O2/ultraviolet (UV), O3/UV, alkaline ozonation, and neutral Fenton reagent. Results show that Sulfolane can be effectively removed from the soil using water as a washing solvent, where optimum conditions were found with 30 min of vigorous shaking, using 1:2 soil/water mass ratio, and a three-cycle extraction procedure. Moreover, the Sulfolane in the soil wash water was also effectively degraded using appropriate AOPs. Among the four AOPs investigated, neutral Fenton was the least effective method to treat Sulfolane in the wash water, while H2O2/UV, O3/UV, and alkaline ozonation can achieve more than 99% of Sulfolane degradation within 1 h.

  • Health Impact Assessment of Sulfolane on Embryonic Development of Zebrafish (Danio rerio).
    Toxics, 2019
    Co-Authors: Soham M Shah, Gopal Achari, Michael Wahba, Hamid R. Habibi
    Abstract:

    Sulfolane is a widely used polar, aprotic solvent that has been detected by chemical analysis in groundwater and creeks around the world including Alberta, Canada (800 µg/mL), Louisiana, USA (2900 µg/mL) and Brisbane, Australia (4344 µg/mL). Previous research provided information on adverse effects of Sulfolane on mammals, but relatively little information is available on aquatic organisms. This study tested the effects of Sulfolane (0-5000 µg/mL) on early development of zebrafish larvae, using various morphometric (survival, hatching, yolk sac and pericardial oedema, haemorrhaging, spinal malformations, swim bladder inflation), growth (larval length, eye volume, yolk sac utilisation), behavioural (touch response, locomotor activity and transcript abundance parameters (ahr1a, cyp1a, thraa, dio1, dio2, dio3, 11βhsd2, gr, aqp3a, cyp19a1b, ddc, gria2b and hsp70) for 120 h. Embryos were chronically exposed to Sulfolane throughout the experimental period. For locomotor activity, however, we also investigated acute response to 2-h Sulfolane treatment. Sulfolane sensitivity causing significant impairment in the observed parameters were different depending on parameters measured, including survival (concentrations greater than 800 µg/mL), morphometric and growth (800-1000 µg/mL), behaviour (500-800 µg/mL) and transcript abundance (10 µg/mL). The overall results provide novel information on the adverse health impacts of Sulfolane on an aquatic vertebrate species, and an insight into developmental impairments following exposure to environmental levels of Sulfolane in fish embryos.

Vahid Taghikhani - One of the best experts on this subject based on the ideXlab platform.

  • DENSITIES, VISCOSITIES AND SURFACE TENSIONS OF AQUEOUS MIXTURES OF Sulfolane+TRIETHANOLAMINE AND Sulfolane + DIISOPROPANOLAMINE
    Journal of Chemical & Engineering Data, 2011
    Co-Authors: Sara Ahmad Kelayeh, Amir Hossein Jalili, Cyrus Ghotbi, Masih Hosseini-jenab, Vahid Taghikhani
    Abstract:

    Densities and viscosities of aqueous solutions containing Sulfolane and ternary aqueous solutions of Sulfolane and triethanolamine and ternary aqueous solutions containing Sulfolane and disopropanolamine and also equilibrium surface tensions of the above ternary aqueous solutions were measured at temperatures ranging from (303.15 to 343.15) K and atmospheric pressure. The overall concentration of Sulfolane, triethanolamine, and diisopropanolamine in solutions varied in the range of 0 to 16.5, 0 to 43, and 0 to 40 mass percent, respectively. Using the density, viscosity, and surface tension of pure water as the solvent, the corresponding experimental values obtained for the investigated solutions were correlated with temperature and concentration by a modified Setchenow equation.

  • densities viscosities and surface tensions of aqueous mixtures of Sulfolane triethanolamine and Sulfolane diisopropanolamine
    Journal of Chemical & Engineering Data, 2011
    Co-Authors: Sara Ahmad Kelayeh, Amir Hossein Jalili, Cyrus Ghotbi, Masih Hosseinijenab, Vahid Taghikhani
    Abstract:

    Densities and viscosities of aqueous solutions containing Sulfolane and ternary aqueous solutions of Sulfolane and triethanolamine and ternary aqueous solutions containing Sulfolane and disopropanolamine and also equilibrium surface tensions of the above ternary aqueous solutions were measured at temperatures ranging from (303.15 to 343.15) K and atmospheric pressure. The overall concentration of Sulfolane, triethanolamine, and diisopropanolamine in solutions varied in the range of 0 to 16.5, 0 to 43, and 0 to 40 mass percent, respectively. Using the density, viscosity, and surface tension of pure water as the solvent, the corresponding experimental values obtained for the investigated solutions were correlated with temperature and concentration by a modified Setchenow equation.

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