Inhibition of gas hydrate formation by means of chemical additives - I. Development of an experimental set-up for characterization of gas hydrate inhibitor efficiency with respect to flow properties and deposition

1996 ◽  
Vol 22 ◽  
pp. 102
Author(s):  
O Urdahl
Keyword(s):  
Gas Hydrate ◽  
Hydrate Formation ◽  
Flow Properties ◽  
Chemical Additives ◽  
Inhibitor Efficiency ◽  
Gas Hydrate Formation ◽  
Set Up

Combination of Silica Gel and Surfactin Promoting Methane Hydrate Formation

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.

Thermodynamic Modelling of Gas Hydrate Formation in the Presence of Inhibitors and the Consideration of their Effect

2014 ◽  
Vol 14 (1) ◽  
pp. 45
Author(s):  
Peyman Sabzi ◽  
Saheb Noroozi
Keyword(s):  
Gas Hydrates ◽  
Gas Hydrate ◽  
Low Temperatures ◽  
Hydrate Formation ◽  
Transportation Systems ◽  
Flow Lines ◽  
Main Approach ◽  
Efficient Inhibitor ◽  
System A ◽  
Gas Hydrate Formation

Gas hydrates formation is considered as one the greatest obstacles in gas transportation systems. Problems related to gas hydrate formation is more severe when dealing with transportation at low temperatures of deep water. In order to avoid formation of Gas hydrates, different inhibitors are used. Methanol is one of the most common and economically efficient inhibitor. Adding methanol to the flow lines, changes the thermodynamic equilibrium situation of the system. In order to predict these changes in thermodynamic behavior of the system, a series of modelings are performed using Matlab software in this paper. The main approach in this modeling is on the basis of Van der Waals and Plateau's thermodynamic approach. The obtained results of a system containing water, Methane and Methanol showed that hydrate formation pressure increases due to the increase of inhibitor amount in constant temperature and this increase is more in higher temperatures. Furthermore, these results were in harmony with the available empirical data.Keywords: Gas hydrates, thermodynamic inhibitor, modelling, pipeline blockage

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