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Yongchen Song – One of the best experts on this subject based on the ideXlab platform.

  • promotion of hydrate based co2 capture from flue gas by Additive Mixtures thf tetrahydrofuran tbab tetra n butyl ammonium bromide
    Energy, 2016
    Co-Authors: Mingjun Yang, Wen Jing, Jiafei Zhao, Zheng Ling, Yongchen Song
    Abstract:

    HBGS (Hydrate-based gas separation) is a potential method for CO2 capture from fossil fuel power plants. High hydrate formation rates and low energy consumption are still the demands for industrial application of HBGS. The promotion effects of three Additive Mixtures (THF (tetrahydrofuran) + TBAB (tetra-n-butyl ammonium bromide)) on flue gas (CO2/N2) hydrate phase equilibrium and CO2 capture characteristics were experimentally investigated in this study. It was found that hydrate phase equilibrium pressure for the 5% THF + 5% TBAB Mixture was almost the same as that for the 5% THF + 10% TBAB Mixture. Both the gas consumption and CO2 recovery increased substantially with increases in the mass fractions of THF or/and TBAB. The experimental results also showed that the gas consumption increases with the enhancement of initial pressure. Considering the hydrate phase equilibrium conditions and gas separation efficiency, an Additive Mixture with a mass fraction of 5% THF + 10% TBAB was found to be a better choice for hydrate-based CO2 capture from flue gas relative to other Additive Mixtures investigated in this study.

  • Promotion of hydrate-based CO2 capture from flue gas by Additive Mixtures (THF (tetrahydrofuran) + TBAB (tetra-n-butyl ammonium bromide))
    Energy, 2016
    Co-Authors: Mingjun Yang, Wen Jing, Jiafei Zhao, Zheng Ling, Yongchen Song
    Abstract:

    Abstract HBGS (Hydrate-based gas separation) is a potential method for CO 2 capture from fossil fuel power plants. High hydrate formation rates and low energy consumption are still the demands for industrial application of HBGS. The promotion effects of three Additive Mixtures (THF (tetrahydrofuran) + TBAB (tetra-n-butyl ammonium bromide)) on flue gas (CO 2 /N 2 ) hydrate phase equilibrium and CO 2 capture characteristics were experimentally investigated in this study. It was found that hydrate phase equilibrium pressure for the 5% THF + 5% TBAB Mixture was almost the same as that for the 5% THF + 10% TBAB Mixture. Both the gas consumption and CO 2 recovery increased substantially with increases in the mass fractions of THF or/and TBAB. The experimental results also showed that the gas consumption increases with the enhancement of initial pressure. Considering the hydrate phase equilibrium conditions and gas separation efficiency, an Additive Mixture with a mass fraction of 5% THF + 10% TBAB was found to be a better choice for hydrate-based CO 2 capture from flue gas relative to other Additive Mixtures investigated in this study.

  • Effects of an Additive Mixture (THF + TBAB) on CO2 hydrate phase equilibrium
    Fluid Phase Equilibria, 2015
    Co-Authors: Mingjun Yang, Wen Jing, Pengfei Wang, Lanlan Jiang, Yongchen Song
    Abstract:

    Abstract A decrease in hydrate formformation pressure is crucial for the development of hydrate-based gas separations. Both tetrahydrofuran (THF) and tetra- n -butyl ammonium bromide (TBAB) are thermodynamic Additives for hydrate-based CO 2 capture, which can effectively decrease the CO 2 hydrate formformation pressure. To obtain fundamental data, the effects of an Additive Mixture (THF + TBAB) on CO 2 hydrate phase equilibrium were investigated. The experiments were conducted using an isochoric method to study the effects of Additive Mixtures with different compositions. A mass fraction of 1% THF with the mass fraction of 0.5%, 1%, 2%, 3% and 5% TBAB, and 5% THF with 3%, 5% and 8% TBAB were used. The experiments were conducted at 276.35–291.05 K and 0.9–4.4 MPa. For all Mixtures with the mass fraction of 1% THF, the effect was subtle (with the exception of the 1% THF + 5% TBAB Mixture). On the other hand, the hydrate equilibrium pressure decreased dramatically when Mixtures containing 5% THF were added. Compared with the addition of only THF, only TBAB or a THF + SDS Additive Mixture, a THF + TBAB Additive Mixture had numerous advantages, such as drastically decreasing the hydrates phase equilibrium pressure. In addition, the influence of the Additive Mixture on the induction time of hydrate formation was examined and discussed. In the present study, a mass fraction of 5% THF + 5% TBAB greatly reduced the induction time of hydrate formation compared with the other concentrations tested.

Rolf Sporndly – One of the best experts on this subject based on the ideXlab platform.

  • short communication use of a Mixture of sodium nitrite sodium benzoate and potassium sorbate in aerobically challenged silages
    Journal of Dairy Science, 2015
    Co-Authors: Martin Knicky, Rolf Sporndly
    Abstract:

    Abstract Aerobic instability is still a common problem with many types of silages, particularly well-fermented silages. This study evaluated the effect of adding an Additive Mixture based on sodium nitrnitrite, sodium benzoate, and potassium sorbate to a variety of crop materials on fermentation quality and aerobic stability of silages. Ensiling conditions were challenged by using a low packing density (104±4.3kg of dry matter/m 3 ) of forage and allowing air ingression into silos (at 14 and 7 d before the end of the storage, for 8 h per event). Additive-treated silages were found to have significantly lower pH and reduced formation of ammonia-N, 2.3-butanediol, and ethanol compared with untreated control silages. Yeast growth was significantly reduced by Additive treatment in comparison with untreated control silage. Consequently, Additive-treated silages were considerably more aerobically stable (6.7 d) than untreated control silages (0.5 d). Overall, adding 5mL/kg of fresh crop of the Additive based on sodium nitrnitrite, sodium benzoate, and potassium sorbate reduced undesirable microorganisms in silages and thereby provided suitable ensiling conditions and prolonged aerobic stability, even under air-challenged laboratory ensiling conditions.

  • the ensiling capability of a Mixture of sodium benzoate potassium sorbate and sodium nitrite
    Journal of Dairy Science, 2011
    Co-Authors: Martin Knicky, Rolf Sporndly
    Abstract:

    Abstract The objective of this study was to evaluate the effects of an Additive comprising sodium benzoate, potassium sorbate, and sodium nitrnitrite on the quality of silages fermented from various forage crops. Thirteen crops in 3 groups (differing in dry matter concentration and degree of ensilability) were treated with the Additive Mixture and compared with untreated control silages. The main focus was on yeast and Clostridia spp. activity in the silages, although other silage quality criteria also were measured. Treated silages from difficult-to-ensile crops at low dry matter were found to have significantly lower silage pH, fewer clostridial spores, and reduced concentrations of ammonia N, butyric acid, and ethanol. In addition, dry matter losses were reduced in treated silages compared with those receiving no Additive. Similar results were observed in silages from easy or intermediate ensilable crops when the dry matter concentration was 350 g/kg, the treated silages contained less ammonia N, ethanol, and yeast for 3 out of 4 forages. All treated silages from all crops were aerobically stable during the examination time. The application of the tested Additive Mixture reduced the growth of undesirable microflora and thereby reduced silage losses and prolonged the aerobic stability of the silages.

Mingjun Yang – One of the best experts on this subject based on the ideXlab platform.

  • promotion of hydrate based co2 capture from flue gas by Additive Mixtures thf tetrahydrofuran tbab tetra n butyl ammonium bromide
    Energy, 2016
    Co-Authors: Mingjun Yang, Wen Jing, Jiafei Zhao, Zheng Ling, Yongchen Song
    Abstract:

    HBGS (Hydrate-based gas separation) is a potential method for CO2 capture from fossil fuel power plants. High hydrate formation rates and low energy consumption are still the demands for industrial application of HBGS. The promotion effects of three Additive Mixtures (THF (tetrahydrofuran) + TBAB (tetra-n-butyl ammonium bromide)) on flue gas (CO2/N2) hydrate phase equilibrium and CO2 capture characteristics were experimentally investigated in this study. It was found that hydrate phase equilibrium pressure for the 5% THF + 5% TBAB Mixture was almost the same as that for the 5% THF + 10% TBAB Mixture. Both the gas consumption and CO2 recovery increased substantially with increases in the mass fractions of THF or/and TBAB. The experimental results also showed that the gas consumption increases with the enhancement of initial pressure. Considering the hydrate phase equilibrium conditions and gas separation efficiency, an Additive Mixture with a mass fraction of 5% THF + 10% TBAB was found to be a better choice for hydrate-based CO2 capture from flue gas relative to other Additive Mixtures investigated in this study.

  • Promotion of hydrate-based CO2 capture from flue gas by Additive Mixtures (THF (tetrahydrofuran) + TBAB (tetra-n-butyl ammonium bromide))
    Energy, 2016
    Co-Authors: Mingjun Yang, Wen Jing, Jiafei Zhao, Zheng Ling, Yongchen Song
    Abstract:

    Abstract HBGS (Hydrate-based gas separation) is a potential method for CO 2 capture from fossil fuel power plants. High hydrate formation rates and low energy consumption are still the demands for industrial application of HBGS. The promotion effects of three Additive Mixtures (THF (tetrahydrofuran) + TBAB (tetra-n-butyl ammonium bromide)) on flue gas (CO 2 /N 2 ) hydrate phase equilibrium and CO 2 capture characteristics were experimentally investigated in this study. It was found that hydrate phase equilibrium pressure for the 5% THF + 5% TBAB Mixture was almost the same as that for the 5% THF + 10% TBAB Mixture. Both the gas consumption and CO 2 recovery increased substantially with increases in the mass fractions of THF or/and TBAB. The experimental results also showed that the gas consumption increases with the enhancement of initial pressure. Considering the hydrate phase equilibrium conditions and gas separation efficiency, an Additive Mixture with a mass fraction of 5% THF + 10% TBAB was found to be a better choice for hydrate-based CO 2 capture from flue gas relative to other Additive Mixtures investigated in this study.

  • Effects of an Additive Mixture (THF + TBAB) on CO2 hydrate phase equilibrium
    Fluid Phase Equilibria, 2015
    Co-Authors: Mingjun Yang, Wen Jing, Pengfei Wang, Lanlan Jiang, Yongchen Song
    Abstract:

    Abstract A decrease in hydrate formation pressure is crucial for the development of hydrate-based gas separations. Both tetrahydrofuran (THF) and tetra- n -butyl ammonium bromide (TBAB) are thermodynamic Additives for hydrate-based CO 2 capture, which can effectively decrease the CO 2 hydrate formation pressure. To obtain fundamental data, the effects of an Additive Mixture (THF + TBAB) on CO 2 hydrate phase equilibrium were investigated. The experiments were conducted using an isochoric method to study the effects of Additive Mixtures with different compositions. A mass fraction of 1% THF with the mass fraction of 0.5%, 1%, 2%, 3% and 5% TBAB, and 5% THF with 3%, 5% and 8% TBAB were used. The experiments were conducted at 276.35–291.05 K and 0.9–4.4 MPa. For all Mixtures with the mass fraction of 1% THF, the effect was subtle (with the exception of the 1% THF + 5% TBAB Mixture). On the other hand, the hydrate equilibrium pressure decreased dramatically when Mixtures containing 5% THF were added. Compared with the addition of only THF, only TBAB or a THF + SDS Additive Mixture, a THF + TBAB Additive Mixture had numerous advantages, such as drastically decreasing the hydrates phase equilibrium pressure. In addition, the influence of the Additive Mixture on the induction time of hydrate formation was examined and discussed. In the present study, a mass fraction of 5% THF + 5% TBAB greatly reduced the induction time of hydrate formation compared with the other concentrations tested.

Lanlan Jiang – One of the best experts on this subject based on the ideXlab platform.

  • Effects of an Additive Mixture (THF + TBAB) on CO2 hydrate phase equilibrium
    Fluid Phase Equilibria, 2015
    Co-Authors: Mingjun Yang, Wen Jing, Pengfei Wang, Lanlan Jiang, Yongchen Song
    Abstract:

    Abstract A decrease in hydrate formation pressure is crucial for the development of hydrate-based gas separations. Both tetrahydrofuran (THF) and tetra- n -butyl ammonium bromide (TBAB) are thermodynamic Additives for hydrate-based CO 2 capture, which can effectively decrease the CO 2 hydrate formation pressure. To obtain fundamental data, the effects of an Additive Mixture (THF + TBAB) on CO 2 hydrate phase equilibrium were investigated. The experiments were conducted using an isochoric method to study the effects of Additive Mixtures with different compositions. A mass fraction of 1% THF with the mass fraction of 0.5%, 1%, 2%, 3% and 5% TBAB, and 5% THF with 3%, 5% and 8% TBAB were used. The experiments were conducted at 276.35–291.05 K and 0.9–4.4 MPa. For all Mixtures with the mass fraction of 1% THF, the effect was subtle (with the exception of the 1% THF + 5% TBAB Mixture). On the other hand, the hydrate equilibrium pressure decreased dramatically when Mixtures containing 5% THF were added. Compared with the addition of only THF, only TBAB or a THF + SDS Additive Mixture, a THF + TBAB Additive Mixture had numerous advantages, such as drastically decreasing the hydrates phase equilibrium pressure. In addition, the influence of the Additive Mixture on the induction time of hydrate formation was examined and discussed. In the present study, a mass fraction of 5% THF + 5% TBAB greatly reduced the induction time of hydrate formation compared with the other concentrations tested.

  • Effects of Additive Mixture (THF/SDS) on the Thermodynamic and Kinetic Properties of CO2/H2 Hydrate in Porous Media
    Industrial & Engineering Chemistry Research, 2013
    Co-Authors: Mingjun Yang, Yongchen Song, Weiguo Liu, Xuke Ruan, Xiaojing Wang, Jiafei Zhao, Lanlan Jiang
    Abstract:

    The separation of CO2 from fuel gas (CO2/H2) as hydrates was studied. In this investigation, the effects and mechanism thereof of the Additive Mixture (1, 2, 3, and 4 mol % tetrahydrofuran (THF), with 1000 mg/L sodium dodedodecyl sulfate) on the thermodynamic and kinetic properties of the hydrate in porous media were measured using an isochoric method, keeping the volume constant. The experimental results show that an increasing THF concentration increases the driving force for hydrate formation and decreases the hydrate induction time. The Langmuir constants of H2 and CO2 showed that H2 may occupy the small cavities of s-II hydrate in the H2–CO2–THF–H2O system. The presence of THF results in a drastic decrease of the hydrate phase equilibrium pressure. Higher THF concentrations correspond to lower hydrate phase equilibrium pressures, but the decrease in pressure with concentration slows when the THF concentration exceeds 3 mol %. An improved thermodynamic model was used to predict the hydrate phase equilibri…

  • effects of Additive Mixture thf sds on the thermodynamic and kinetic properties of co2 h2 hydrate in porous media
    Industrial & Engineering Chemistry Research, 2013
    Co-Authors: Mingjun Yang, Yongchen Song, Weiguo Liu, Xuke Ruan, Xiaojing Wang, Jiafei Zhao, Lanlan Jiang
    Abstract:

    The separation of CO2 from fuel gas (CO2/H2) as hydrates was studied. In this investigation, the effects and mechanism thereof of the Additive Mixture (1, 2, 3, and 4 mol % tetrahydrofuran (THF), with 1000 mg/L sodium dodedodecyl sulfate) on the thermodynamic and kinetic properties of the hydrate in porous media were measured using an isochoric method, keeping the volume constant. The experimental results show that an increasing THF concentration increases the driving force for hydrate formation and decreases the hydrate induction time. The Langmuir constants of H2 and CO2 showed that H2 may occupy the small cavities of s-II hydrate in the H2–CO2–THF–H2O system. The presence of THF results in a drastic decrease of the hydrate phase equilibrium pressure. Higher THF concentrations correspond to lower hydrate phase equilibrium pressures, but the decrease in pressure with concentration slows when the THF concentration exceeds 3 mol %. An improved thermodynamic model was used to predict the hydrate phase equilibri…

Martin Knicky – One of the best experts on this subject based on the ideXlab platform.

  • short communication use of a Mixture of sodium nitrite sodium benzoate and potassium sorbate in aerobically challenged silages
    Journal of Dairy Science, 2015
    Co-Authors: Martin Knicky, Rolf Sporndly
    Abstract:

    Abstract Aerobic instability is still a common problem with many types of silages, particularly well-fermented silages. This study evaluated the effect of adding an Additive Mixture based on sodium nitrite, sodium benzoate, and potassium sorbate to a variety of crop materials on fermentation quality and aerobic stability of silages. Ensiling conditions were challenged by using a low packing density (104±4.3kg of dry matter/m 3 ) of forage and allowing air ingression into silos (at 14 and 7 d before the end of the storage, for 8 h per event). Additive-treated silages were found to have significantly lower pH and reduced formation of ammonia-N, 2.3-butanediol, and ethanol compared with untreated control silages. Yeast growth was significantly reduced by Additive treatment in comparison with untreated control silage. Consequently, Additive-treated silages were considerably more aerobically stable (6.7 d) than untreated control silages (0.5 d). Overall, adding 5mL/kg of fresh crop of the Additive based on sodium nitrite, sodium benzoate, and potassium sorbate reduced undesirable microorganisms in silages and thereby provided suitable ensiling conditions and prolonged aerobic stability, even under air-challenged laboratory ensiling conditions.

  • the ensiling capability of a Mixture of sodium benzoate potassium sorbate and sodium nitrite
    Journal of Dairy Science, 2011
    Co-Authors: Martin Knicky, Rolf Sporndly
    Abstract:

    Abstract The objective of this study was to evaluate the effects of an Additive comprising sodium benzoate, potassium sorbate, and sodium nitrite on the quality of silages fermented from various forage crops. Thirteen crops in 3 groups (differing in dry matter concentration and degree of ensilability) were treated with the Additive Mixture and compared with untreated control silages. The main focus was on yeast and Clostridia spp. activity in the silages, although other silage quality criteria also were measured. Treated silages from difficult-to-ensile crops at low dry matter were found to have significantly lower silage pH, fewer clostridial spores, and reduced concentrations of ammonia N, butyric acid, and ethanol. In addition, dry matter losses were reduced in treated silages compared with those receiving no Additive. Similar results were observed in silages from easy or intermediate ensilable crops when the dry matter concentration was 350 g/kg, the treated silages contained less ammonia N, ethanol, and yeast for 3 out of 4 forages. All treated silages from all crops were aerobically stable during the examination time. The application of the tested Additive Mixture reduced the growth of undesirable microflora and thereby reduced silage losses and prolonged the aerobic stability of the silages.