Performance evaluation of methane separation from coal mine gas by gas hydrate formation in a stirred reactor and in a fixed bed of silica sand

In order to explore the method of accelerating hydration separation process to recover methane from mine gas, propane hydrate phase equilibrium was used to measure the equilibrium points of three kinds of mine gas in NaCl solution. Driving force was set as 1 MPa on this basis and high-pressure experimental apparatus of mine gas hydrate was used to carry out the nucleation kinetics experiments of mine gas hydrate for three gas samples in different concentrations of sodium chloride (NaCl) and sodium dodecyl sulfate (SDS) compound systems, which was to study the effect of propane and NaCl-SDS solution on nucleation process of mine gas hydrate. The results showed that induction time of multicomponent mine gas hydrate formation was shortened with the decrease of methane concentration and increase of propane concentration. The induction time of mine gas hydrate formation was shortened with the reduction of NaCl concentration and the increase of SDS concentration. It was found that methane and propane in multicomponent mine gas nucleated collaboratively, which simplified its nucleation process compared with the single component. NaCl has two kinds of functions.

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Investigation on methane recovery from low-concentration coal mine gas by tetra-n-butyl ammonium chloride semiclathrate hydrate formation

Applied Energy ◽

10.1016/j.apenergy.2017.08.069 ◽

2018 ◽

Vol 227 ◽

pp. 686-693 ◽

Cited By ~ 27

Author(s):

Dong-Liang Zhong ◽

Wen-Chun Wang ◽

Zhen-Lin Zou ◽

Yi-Yu Lu ◽

Jin Yan ◽

...

Keyword(s):

Ammonium Chloride ◽

Coal Mine ◽

Hydrate Formation ◽

Methane Recovery ◽

Low Concentration ◽

Coal Mine Gas ◽

Mine Gas ◽

Semiclathrate Hydrate

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Natural Gas Hydrate Formation and Decomposition in the Presence of Kinetic Inhibitors. 2. Stirred Reactor Experiments

Energy & Fuels ◽

10.1021/ef200813v ◽

2011 ◽

Vol 25 (10) ◽

pp. 4384-4391 ◽

Cited By ~ 112

Author(s):

Nagu Daraboina ◽

Praveen Linga ◽

John Ripmeester ◽

Virginia K. Walker ◽

Peter Englezos

Keyword(s):

Natural Gas ◽

Gas Hydrate ◽

Hydrate Formation ◽

Natural Gas Hydrate ◽

Stirred Reactor ◽

Gas Hydrate Formation

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Investigation of CO2 Capture from a CO2 + CH4 Gas Mixture by Gas Hydrate Formation in the Fixed Bed of a Molecular Sieve

Industrial & Engineering Chemistry Research ◽

10.1021/acs.iecr.5b03989 ◽

2015 ◽

Vol 55 (29) ◽

pp. 7973-7980 ◽

Cited By ~ 8

Author(s):

Dong-Liang Zhong ◽

Zheng Li ◽

Yi-Yu Lu ◽

Jia-Le Wang ◽

Jin Yan ◽

...

Keyword(s):

Co2 Capture ◽

Gas Hydrate ◽

Molecular Sieve ◽

Fixed Bed ◽

Hydrate Formation ◽

Gas Mixture ◽

Gas Hydrate Formation

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Combination of Silica Gel and Surfactin Promoting Methane Hydrate Formation

Journal of Energy Resources Technology ◽

10.1115/1.4049318 ◽

2020 ◽

pp. 1-31

Author(s):

Amit Arora ◽

Swaranjit Singh cameotra ◽

Chandrajit Balomajumder ◽

Rajnish Kumar ◽

Anil Kumar Singh ◽

...

Keyword(s):

Silica Gel ◽

Gas Hydrate ◽

Methane Hydrate ◽

Fixed Bed ◽

Hydrate Formation ◽

Subtilis Strain ◽

Chemical Additives ◽

Gas Hydrate Formation ◽

Novel Applications

Abstract Recently gas hydrates based technologies have been exploited for few novel applications such as Storage and transpiration of natural gas, gas mixtures separation, CO2 capture ,seawater desalination etc. Most of these applications are currently facing a challenge of low rate of gas hydrate formation. Chemical additives like surfactants can play a role of a good kinetic promoter for gas hydrate formation. The present study reports application of biosurfactant for enhancing gas hydrate formation. Biosurfactant was produced by Bacillus subtilis strain A21. These types of microbes show their presence in the real gas hydrate sites also. The surfactin was characterized using many sophisticated technique conforming the formation of surfactin. It was used in presence of fixed bed media of silica gel and it was observed that surfactin in the presence of silica gel has increased the consumption of moles of methane as well as reduced the induction time also as well as the conversion was also increase up to 27.9 % for 390 minutes for 1000 ppm surfactin hence indicating it to be a clean and novel promoter of methane hydrate formation in combination with silica gel which can replace its synthetic counter parts which are having environmental concerns.

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