Development of a Surface‐Active Coating for Promoted Gas Hydrate Formation

Filarsky, Florian; Schmuck, Carsten; Schultz, H. J.

doi:10.1002/cite.201800002

Cited by 26 publications

(22 citation statements)

References 36 publications

(38 reference statements)

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“…47,48 Furthermore, this procedure was the subject of a previous study, which included the development of a coating with a kinetic promotion effect. 49 Before silanization, the slides and spheres were cleansed by oxidation with peroxymonosulfuric acid (POMSA) for 24 h. The slides and spheres were then washed with deionized water and dried at 70 °C. In another step, the materials were conditioned with ethanol (EtOH) and dried again at 70 °C before a fresh solution of ethanol and 1 vol % DS or ES was added.…”

Section: Methodsmentioning

confidence: 99%

“…In addition, object slides delivered from Thermo Scientific were analogously silanized to determine the contact angles. Processing of the slides and the glass spheres for the reactor bed was performed based on Kutelova et al and Jradi et al using the following procedure. , Furthermore, this procedure was the subject of a previous study, which included the development of a coating with a kinetic promotion effect . Before silanization, the slides and spheres were cleansed by oxidation with peroxymonosulfuric acid (POMSA) for 24 h. The slides and spheres were then washed with deionized water and dried at 70 °C.…”

Section: Experimental Sectionmentioning

confidence: 99%

See 1 more Smart Citation

Impact of Modified Silica Beads on Methane Hydrate Formation in a Fixed-Bed Reactor

Filarsky

Schmuck

Schultz

2019

Ind. Eng. Chem. Res.

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The work deals with the optimization of methane hydrate storage in fixed-bed reactor systems made up of modified silica beads. Under transient conditions, rapid hydrate growth is achieved at 4 °C. Glass beads are modified via silanization and treated with peroxymonosulfuric acid. It is proven that the fixed-bed surface properties significantly determine the gas hydrate growth and final gas uptake and therefore determine the successful technical design of the system. The capillary pressure is calculated in each bed configuration and is set in relation to the overall gas uptake. A negative capillary pressure leads to a holdback of water in the fixed-bed system. A high water-to-hydrate conversion is obtained for an untreated fixed bed with a positive capillary pressure. In the presence of SDS, the capillary effects are negated by the kinetic promotion effects. An inhibiting behavior is observed when using hydrophilic beads after treatment with peroxymonosulfuric acid.

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Section: Methodsmentioning

confidence: 99%

Section: Experimental Sectionmentioning

confidence: 99%

Impact of Modified Silica Beads on Methane Hydrate Formation in a Fixed-Bed Reactor

Filarsky

Schmuck

Schultz

2019

Ind. Eng. Chem. Res.

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“…The mode of operation of kinetic promoters, essentially surfactants, is based on accelerating gas hydrate formation by reducing the surface tension, which leads to improved mass transport of gas into the liquid phase [36]. An alternative approach to improving hydrate formation is apparatus engineering measures, for instance, by using a stirred [37][38][39], packed bed [37,40,41], bubble column [42,43] or spray reactor design [44,45]; this investigation focuses on the latter approach.…”

Section: Introductionmentioning

confidence: 99%

Rapid Gas Hydrate Formation—Evaluation of Three Reactor Concepts and Feasibility Study

Filarsky¹,

Wieser²,

Schultz³

2021

Molecules

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Gas hydrates show great potential with regard to various technical applications, such as gas conditioning, separation and storage. Hence, there has been an increased interest in applied gas hydrate research worldwide in recent years. This paper describes the development of an energetically promising, highly attractive rapid gas hydrate production process that enables the instantaneous conditioning and storage of gases in the form of solid hydrates, as an alternative to costly established processes, such as, for example, cryogenic demethanization. In the first step of the investigations, three different reactor concepts for rapid hydrate formation were evaluated. It could be shown that coupled spraying with stirring provided the fastest hydrate formation and highest gas uptakes in the hydrate phase. In the second step, extensive experimental series were executed, using various different gas compositions on the example of synthetic natural gas mixtures containing methane, ethane and propane. Methane is eliminated from the gas phase and stored in gas hydrates. The experiments were conducted under moderate conditions (8 bar(g), 9–14 °C), using tetrahydrofuran as a thermodynamic promoter in a stoichiometric concentration of 5.56 mole%. High storage capacities, formation rates and separation efficiencies were achieved at moderate operation conditions supported by rough economic considerations, successfully showing the feasibility of this innovative concept. An adapted McCabe-Thiele diagram was created to approximately determine the necessary theoretical separation stage numbers for high purity gas separation requirements.

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“…Mixing and bubbling are traditionally used as mechanical initiation of GH synthesis processes [46][47][48][49][50][51][52][53][54][55]. The use of mechanical mixing improves gas-liquid contact since mixing contributes to the renewal of the gas-liquid interface to improve hydrate formation.…”

Section: Research Backgroundmentioning

confidence: 99%

Intensification of Gas Hydrate Formation Processes by Renewal of Interfacial Area between Phases

Pavlenko

Koshlak

2021

Energies

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This paper presents the analysis of the main reasons for a significant decrease in the intensity of diffusion processes during the formation of gas hydrates; solutions to this problem are proposed in a new process flow diagram for the continuous synthesis of gas hydrates. The physical processes, occurring at the corresponding stages of the process flow, have been described in detail. In the proposed device, gas hydrate is formed at the boundary of gas bubbles immersed in cooled water. The dynamic effects arising at the bubble boundary contribute to the destruction of a forming gas hydrate structure, making it possible to renew the contact surface and ensure efficient heat removal from the reaction zone. The article proposes an assessment technique for the main process parameters in the synthesis of hydrates based on the criterion of thermodynamic parameters optimization. The optimization criterion determines the relationship of intensity of heat and mass transfer processes at the phase contact interface of reacting phases, correlating with the maximum GH synthesis rate, and makes it possible to determine optimum thermodynamic parameters in the reactor zone.

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Development of a Surface‐Active Coating for Promoted Gas Hydrate Formation

Cited by 26 publications

References 36 publications

Impact of Modified Silica Beads on Methane Hydrate Formation in a Fixed-Bed Reactor

Impact of Modified Silica Beads on Methane Hydrate Formation in a Fixed-Bed Reactor

Rapid Gas Hydrate Formation—Evaluation of Three Reactor Concepts and Feasibility Study

Intensification of Gas Hydrate Formation Processes by Renewal of Interfacial Area between Phases

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