Renewable biosurfactants for energy-efficient storage of methane: An experimental and computational investigation

Farhadian, Abdolreza; Heydari, Atousa; Maddah, Mina; Hosseini, Masoomeh Sadat; Sadeh, Elaheh; Peyvandi, Kiana; Varaminian, Farshad

doi:10.1016/j.cej.2021.131723

Cited by 18 publications

(32 citation statements)

References 68 publications

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“…Some critical parameters to evaluate the promoting power of GHPs include the induction period of hydrate formation, the rate of hydrate growth, and the water-to-hydrate conversion. ,, Considering that the experiments were carried out in the isochoric condition, the incorporation of gas molecules into the hydrate cavities leads to a gradual decrease in pressure and, consequently, the driving force of the process. Additionally, the temperature and torque values sharply increase due to gas hydrate formation as depicted in Figure a.…”

Section: Resultsmentioning

confidence: 99%

“…Thus, it can be concluded that the presence of sodium sulfonic acid groups in the structure of a surfactant has a positive effect on its promotion property. Although SDS is known as an effective kinetic GHP, poor biodegradability and foam generation during the hydrate melting step strictly limit its applications. , The formation of excessive foam makes it difficult to handle the hydrate-based methane storage even on a lab-scale setup; it is expected to be a serious obstacle to the commercialization of this technology. , Therefore, it is necessary to develop new biosurfactants for improving the kinetic of gas hydrate formation with lower foam formation. , The present study aims to use castor oil in order to synthesize a branched biosurfactant with a sulfonated group as a green GHP for methane gas hydrate. The promotion activity of sulfonated castor oil (SCO) was assessed using a high-pressure microdifferential scanning calorimeter and a high-pressure autoclave.…”

Section: Introductionmentioning

confidence: 99%

“…Although SDS is known as an effective kinetic GHP, poor biodegradability and foam generation during the hydrate melting step strictly limit its applications. 23,66 The formation of excessive foam makes it difficult to handle the hydrate-based methane storage even on a lab-scale setup; it is expected to be a serious obstacle to the commercialization of this technology. 12,67 Therefore, it is necessary to develop new biosurfactants for improving the kinetic of gas hydrate formation with lower foam formation.…”

Section: ■ Introductionmentioning

confidence: 99%

“…12,67 Therefore, it is necessary to develop new biosurfactants for improving the kinetic of gas hydrate formation with lower foam formation. 66,68 The present study aims to use castor oil in order to synthesize a branched biosurfactant with a sulfonated group as a green GHP for methane gas hydrate. The promotion activity of sulfonated castor oil (SCO) was assessed using a high-pressure microdifferential scanning calorimeter and a high-pressure autoclave.…”

Section: ■ Introductionmentioning

confidence: 99%

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Sulfonated Castor Oil as an Efficient Biosurfactant for Improving Methane Storage in Clathrate Hydrates

Farhadian

Stoporev

Varfolomeev

et al. 2022

ACS Sustainable Chem. Eng.

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High toxicity and huge foaming are two severe challenges for gas storage strategies based on promoting the gas hydrate formation using surfactants. The present study used castor oil as an eco-friendly resource to develop novel biosurfactants for methane storage. Transmission and scanning electron microscopy, dynamic light scattering, and interfacial tension measurements revealed the surfactant properties of sulfonated castor oil (SCO). In addition, a high-pressure autoclave and a microdifferential scanning calorimeter test unveiled SCO as an effective kinetic hydrate promoter. The results showed that SCO significantly enhanced the rate of methane hydrate formation. A maximum of 76% water-tohydrate conversion was observed in 0.1 wt % SCO solution under stirring conditions. Pure water, 0.1 wt % SCO, and 0.1 wt % sodium dodecyl sulfate (SDS) solutions allowed 50% conversion to be achieved for 329, 39, and 27 min, respectively. This made the castor oil-based reagent as effective as the well-known kinetic hydrate promoter SDS. Furthermore, the SCO solution's foam ratio and stability were 8.25 and 2.75 times lower than those of SDS. Additionally, SCO showed a more favorable safety profile for humans and the environment as it is toxic to animals in higher concentrations than SDS according to in vivo studies. In addition, a combination of high-pressure DSC, low-temperature powder Xray diffractometry, and visual analysis of hydrate samples depending on the temperature mode, promoter type, and its concentration revealed that SCO and SDS enhanced hydrate growth by different mechanisms. The loose hydrate mass was squeezed out toward the gas phase in both cases. However, in the case of SDS, the hydrate traditionally climbed the cell walls while SCO seemed to change the wall wettability, which led to the transfer of water into the reaction zone along with the forming hydrate crystals and the domed shape of the hydrate. These findings provide reliable evidence to synthesize efficient and environmentally friendly reagents based on castor oil to improve methane storage in the clathrate hydrate.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Sulfonated Castor Oil as an Efficient Biosurfactant for Improving Methane Storage in Clathrate Hydrates

Farhadian

Stoporev

Varfolomeev

et al. 2022

ACS Sustainable Chem. Eng.

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“…The International Energy Agency predicted a 30% increase in global natural gas demand by 2040 under current policies . Natural gas, as the most environmentally friendly fossil fuel, plays a critical role in meeting global energy demand, accounting for 24% of global consumption. , Thus, an urgent question arises about efficient storage and transportation of natural gas, including associated petroleum gas. The most common gas transportation method is through pipelines, which is not always practical because of distance and accessibility restrictions.…”

Section: Introductionmentioning

confidence: 99%

Dual Promotion–Inhibition Effects of Novel Ethylenediaminetetraacetic Acid Bisamides on Methane Hydrate Formation for Gas Storage and Flow Assurance Applications

et al. 2021

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Surfactants have been reported as the most efficient gas hydrate promoters (GHPs) for gas storage and transportation; however, slow kinetics of nucleation and growth of hydrate crystals and foam formation during hydrate dissociation severely impact their applications. Here, a new class of chemical additives based on ethylenediaminetetraacetic acid bisamides was developed to control methane hydrate formation for gas storage and flow assurance applications. Synthesized molecules contain both polar fragments (carboxyl and amide groups) and hydrophobic alkyl groups with different sizes and branching. The obtained results revealed that bisamides with short alkyl chains (n-propyl and isopropyl) promoted the formation of methane hydrate and significantly reduced foam stability during hydrate decomposition compared to sodium dodecyl sulfate (SDS). Moreover, by increasing the length of the alkyl substituent up to propyl, the nucleation time increased. However, the conversion of gas to hydrate escalated remarkably. A transition from promotion to inhibition properties is observed with a further increase in the alkyl chain from propyl to butyl. Nevertheless, bisamides with hexyl groups showed surfactant properties, which is responsible for their poor promotion efficiency. In addition, the studied compounds practically do not form foam and are less toxic compared to SDS as a wellknown GHP. The results of this study can be useful for the design and development of effective additives for gas storage and flow assurance applications.

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HCFC-141b hydrate formation with amino acid surfactants: Insights into hydrate formation promotion mechanism

Sun

2023

Chemical Engineering Science

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Renewable biosurfactants for energy-efficient storage of methane: An experimental and computational investigation

Cited by 18 publications

References 68 publications

Sulfonated Castor Oil as an Efficient Biosurfactant for Improving Methane Storage in Clathrate Hydrates

Sulfonated Castor Oil as an Efficient Biosurfactant for Improving Methane Storage in Clathrate Hydrates

Dual Promotion–Inhibition Effects of Novel Ethylenediaminetetraacetic Acid Bisamides on Methane Hydrate Formation for Gas Storage and Flow Assurance Applications

HCFC-141b hydrate formation with amino acid surfactants: Insights into hydrate formation promotion mechanism

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