Surface tensions of aqueous solutions of lithium dodecyl sulfate, sodium oleate, and dodecylbenzene sulfonic acid in contact with methane under hydrate-forming conditions

Ando, Naoki; Kuwabara, Yui; Kodama, Takehide; Mori, Yasuhiko H.

doi:10.1016/j.fluid.2011.11.011

Cited by 6 publications

(7 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Dodecylbenzene sulfonic acid (95%) was purchased from TCI (TCI, Shanghai, China). Its critical micelle concentration (CMC) is 0.4134 g/L [ 18 ]. The biomasses of corn straw and poplar leaf were collected from Inner Mongolia and Beijing, China.…”

Section: Methodsmentioning

confidence: 99%

Adsorption Mechanisms of Dodecylbenzene Sulfonic Acid by Corn Straw and Poplar Leaf Biochars

et al. 2017

View full text Add to dashboard Cite

Biochar is an eco-friendly, renewable, and cost-effective material that can be used as an adsorbent for the remediation of contaminated environments. In this paper, two types of biochar were prepared through corn straw and poplar leaf pyrolysis at 300 °C and 700 °C (C300, C700, P300, P700). Brunaer–Emmett–Teller N2 surface area, scanning electron microscope, elemental analysis, and infrared spectra were used to characterize their structures. These biochars were then used as adsorbents for the adsorption of dodecylbenzene sulfonic acid (DBSA). The microscopic adsorption mechanisms were studied by using infrared spectra, 13C-nuclear magnetic resonance spectra, and electron spin resonance spectra. The surface area and pore volume of C700 (375.89 m2/g and 0.2302 cm3/g) were the highest among all samples. Elemental analysis results showed that corn straw biochars had a higher aromaticity and carbon to nitrogen (C/N) ratio than the poplar leaf biochars. High temperature caused the increase of carbon content and the decrease of oxygen content, which also gave the biochars a higher adsorption rate. Pseudo-second order kinetic provided a better fit with the experimental data. Adsorption isotherm experiments showed that the adsorption isotherm of C300 fit the linear model. For other biochars, the adsorption isotherms fitted Langmuir model. Biochars with high temperatures exhibited enhanced adsorption capacity compared with ones at low temperatures. The qmax values of biochars to DBSA followed the order of P700 > C700 > P300. The adsorption mechanisms were complex, including partition, anion exchange, the formation of H bonds, covalent bonds, and charge transfer. The adsorption by covalent bonding might be the key mechanism determining the adsorption capacity of P700.

show abstract

Section: Methodsmentioning

confidence: 99%

Adsorption Mechanisms of Dodecylbenzene Sulfonic Acid by Corn Straw and Poplar Leaf Biochars

et al. 2017

View full text Add to dashboard Cite

show abstract

“…This problem has been addressed by several authors by using promoters, such as thermodynamic coformers (tetrahydrofuran and other cyclic ethers, propylene oxide, cyclopentane, etc.) and their mixtures with kinetic promoters, semiclathrate formers (tetra-alkyl ammonium salts, e.g., tetrabutylammonium bromide), , and anionic surfactants. ,− The former two families of promoters act by decreasing the hydrate equilibrium pressures but have their main drawbacks in the amounts needed (several mol %), which raises an environmental concern when considering that a separation technology based on hydrates is targeted to very large volume applications such as landfill biogas plants. Furthermore, the relatively high amounts of thermodynamic or semiclathrate former promoters decrease the occupancy of the gas components to be separated, thus dramatically reducing the overall yield of the process.…”

Section: Introductionmentioning

confidence: 99%

Separation of CO₂ and CH₄ from Biogas by Formation of Clathrate Hydrates: Importance of the Driving Force and Kinetic Promoters

Profio¹,

Canale²,

d’Alessandro³

et al. 2017

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

This paper relates to the upgrading of model biogas mixtures, typically 60/40 CH 4 /CO 2 , by clathrate (gas) hydrates, which have recently been considered as a safe alternative to high-pressure or liquefied gas storage, and as an economic, chemical-free process for the separation of gas mixtures. Several factors affecting the driving force to hydrate formation are considered, such as the degree of overpressurization and the presence of chemical promoters. Promoters used were several anionic and zwitterionic surfactants which are demonstrated to affect the hydrate-forming ability of water. Some lignin derivatives were also tested. Promoted hydrates were also compared to hydrate-based separation starting from nonpromoted water. Separation experiments were conducted under pressures of 4 and 2.5 MPa at 274 K, under either pressure-dropping or constant pressure conditions. Results show that the separation ability of clathrate hydrates as determined by the separation factor S is highest when no promoters are added to the water phase; the well-known promoter sodium dodecyl sulfate (SDS) shows a value of S which is approximately half the value of that in pure water while higher separations were obtained with some lignin derivatives and a non-surface-active naphthalenesulfonate derivative. We also show that the contribution of CO 2 solubility in water to S is a main player in the overall process. Finally, the separation ability of hydrates seems to be inversely proportional to the amount of gas mixture enclathrated, i.e., the occupancy.

show abstract

“…The critical micelle concentration (CMC) is reported as 0.4134 g L -1 (Ando et al 2012). It is soluble in water.…”

Section: Methodsmentioning

confidence: 99%

Sorption behavior of dodecylbenzene sulfonic acid on humic acids from Mollisol and Alluvial soils

Zhao

Song³

et al. 2016

Environ Earth Sci

View full text Add to dashboard Cite

Dodecylbenzene sulfonic acid (DBSA), the acid form of sodium dodecylbenzenesulfonate (SDBS), is often identified and detected in soils. However, it still has less awareness of the sorption behavior of DBSA with soil organic matter. In this paper, the sorption behaviors of DBSA on two different types of soils (Mollisol and Alluvial soils) and soil humic acids (HAs) were studied and compared, and the mechanisms of HAs and DBSA interactions were discussed. Sorption dynamics and isotherms were studied using the batch equilibrium method. The sorption kinetics was relatively slow, and the sorption equilibrium can be reached within 10 h. In the designed concentration range of DBSA in this work, the maximum DBSA sorption capacities on the Alluvial soil HA (AHA) and the Mollisol soil HA (MHA) were 115.0 and 112.2 mg/ g, respectively, which were higher than those of the Alluvial soil (AS) and Mollisol soil (MS). The sorption isotherms were well fitted by the Freundlich equation. The sorption capacity of the AHA was greater than that of the MHA, AS and MS. Furthermore, the sorption complexes of HAs and DBSA were characterized using elemental analysis, micro-Fourier transform infrared spectroscopy (FTIR), solid-state 13 C nuclear magnetic resonance (NMR) spectroscopy and electron spin resonance spectroscopy (ESR), it reveals that the sorption of DBSA on HAs mainly occurred on the C=O, C-O and aromatic functional groups. Moreover, the sorption data indicated that the sorption behavior was complicated, probably due to the formation of H bonds, hydrophobic interactions and electron donoracceptor mechanisms.

show abstract

Surface tensions of aqueous solutions of lithium dodecyl sulfate, sodium oleate, and dodecylbenzene sulfonic acid in contact with methane under hydrate-forming conditions

Cited by 6 publications

References 15 publications

Adsorption Mechanisms of Dodecylbenzene Sulfonic Acid by Corn Straw and Poplar Leaf Biochars

Adsorption Mechanisms of Dodecylbenzene Sulfonic Acid by Corn Straw and Poplar Leaf Biochars

Separation of CO₂ and CH₄ from Biogas by Formation of Clathrate Hydrates: Importance of the Driving Force and Kinetic Promoters

Sorption behavior of dodecylbenzene sulfonic acid on humic acids from Mollisol and Alluvial soils

Contact Info

Product

Resources

About

Surface tensions of aqueous solutions of lithium dodecyl sulfate, sodium oleate, and dodecylbenzene sulfonic acid in contact with methane under hydrate-forming conditions

Cited by 6 publications

References 15 publications

Adsorption Mechanisms of Dodecylbenzene Sulfonic Acid by Corn Straw and Poplar Leaf Biochars

Adsorption Mechanisms of Dodecylbenzene Sulfonic Acid by Corn Straw and Poplar Leaf Biochars

Separation of CO2 and CH4 from Biogas by Formation of Clathrate Hydrates: Importance of the Driving Force and Kinetic Promoters

Sorption behavior of dodecylbenzene sulfonic acid on humic acids from Mollisol and Alluvial soils

Contact Info

Product

Resources

About

Separation of CO₂ and CH₄ from Biogas by Formation of Clathrate Hydrates: Importance of the Driving Force and Kinetic Promoters