Influence of external factors on the process of hydrates development in laboratory conditions

Authors

DOI:

https://doi.org/10.15587/2312-8372.2018.141302

Keywords:

gas hydrates, gas content of hydrate, external factors, statistical analysis

Abstract

The object of research is the influence of various factors on the process of synthesis of propane hydrate in laboratory conditions. It is known that a synthesized gas hydrate can contain a significant amount of ice, which reduces its gas content. The quality of the hydrate is affected by: gas pressure, water temperature, time of the experiment and the concentration of surfactants.

To study the complex effect of these factors on the quality of the hydrate obtained, an experimental setup is developed. After synthesis of the gas hydrate, its gas content is determined using a specially designed stand. In the course of the research, various measuring instruments were used: manometers, thermometers, measuring utensils, electronic scales, etc., which made it possible to obtain reliable information on the thermophysical characteristics of the synthesis and dissociation of gas hydrate.

As a result of the multivariate experiment, an array of data for analysis by mathematical statistics methods is obtained. Correlation coefficients are determined and found that the dominant factors are the gas pressure and concentration of surfactants. The water temperature should be within the operating range of 1–5 °C. The formation time of the hydrate in the bubbling regime within 0.5–5 h also does not significantly affect the quality of the obtained hydrate. For all factors, regression dependencies and graphs are constructed. It is established that for standard regression dependencies (linear, exponential, logarithmic and polynomial), the coefficients of multiple correlation are in the range 0.19–0.46. This means that the standard regression relationships do not allow to take into account all the features of the obtained results. Therefore, the selection of the optimal dependence is carried out by the method of variation of the coefficients and types of functional dependencies and an approximate formula is obtained for determining the predicted gas content of the hydrate.

The research results show that due to the complex consideration of various factors, it is possible to determine the range of optimum values of pressure, temperature and concentration of surfactants, which makes it possible to quickly produce a high-quality hydrate.

Author Biographies

Nashwan Abdullah, Poltava National Technical Yuri Kondratyuk University, 24, Pershotravnevyi аve., Poltava, Ukraine, 36011

Postgraduate Student

Department of Heat Gas Supply, Ventilation and Heating

Bohdan Kutnyi, Poltava National Technical Yuri Kondratyuk University, 24, Pershotravnevyi аve., Poltava, Ukraine, 36011

PhD, Associate Professor

Department of Heat Gas Supply, Ventilation and Heating

References

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Published

2018-04-24

How to Cite

Abdullah, N., & Kutnyi, B. (2018). Influence of external factors on the process of hydrates development in laboratory conditions. Technology Audit and Production Reserves, 4(1(42), 39–45. https://doi.org/10.15587/2312-8372.2018.141302

Issue

Vol. 4 No. 1(42) (2018): Industrial and Technology Systems

Section

Technology and System of Power Supply: Original Research

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Copyright (c) 2018 Nashwan Abdullah, Bohdan Kutnyi

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