Abstract
This paper focuses on the model of gas hydrate formation in an experimental device, which allows the circulation of the resulting mixture (water and gas) and significantly accelerates the process of hydrate formation in the laboratory. A 3D model was developed to better imagine the placement of individual parts of the device. The kinetics of hydrate formation were predicted from equilibrium values of chemical potentials. The aim of solving the equations of state gases in the mathematical model was to optimize the parameters involved in the formation of hydrates. The prediction of the mathematical model was verified by numerical simulation. The mathematical model and numerical simulation predict the chemical reaction evolving over time and determine the amount of crystallized water in the reactor. A remarkable finding is that the deviation of the model and simulation at the initiation the calculation of crystallized water starts at 76% and decreases over time to 2%. Subsequently, the number of moles of bound gas in the hydrate acquires the same percentage deviations. The amount of water supplied to the reactor is expressed by both methods identically with a maximum deviation of 0.10%. The different character is shown by the number of moles of gas remaining in the reactor. At the beginning of the calculation, the deviation of both methods is 0%, but over time the deviation slowly increases, and at the end it expresses the number of moles in the reactor with a deviation of 0.14%. By previous detection, we can confirm that the model successfully determines the amount of methane hydrate formed in the reactor of the experimental equipment. With the attached pictures from the realized experiment, we confirmed that the proposed method of hydrate production is tested and takes minutes. The article calculates the energy efficiency of natural gas hydrate in the proposed experimental device.
Highlights
Global warming is largely caused by increasing concentrations of CO2 and high amounts of greenhouse gases released into the atmosphere
The article deals with the design of an experimental device designed for the continuous production of synthetic methane hydrate
Hydrates of natural gas or methane have an interesting potential in terms of storage capacity, and the future need for energy from hydrocarbon sources may be a requirement to improve the synthetic processes of hydrate formation
Summary
Global warming is largely caused by increasing concentrations of CO2 and high amounts of greenhouse gases released into the atmosphere. Natural gas produces less CO2 during combustion and can be an alternative fuel to oil and coal Their amount is demonstrably reduced by the storage of these gases in stable hydrate structures, and we quickly need to reach a consensus on limiting global warming. The main reasons are storage capacity, non-explosive character, higher temperature compared to LNG and lower pressure compared to CNG They are beginning to be considered as an energy source for the decade. Its industrial use discourages random induction time, slow rate of formation, low gas absorption and energy intensity of formation These basic disadvantages need to be implemented for hydrates to enter into industrial transport
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