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Perm researchers can predict gas pipeline ice clogging
Perm researchers can predict gas pipeline ice clogging
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Experts at Perm National Research Polytechnic University have learned to foresee ice clogging inside gas pipelines with an accuracy of 99.5%. Their findings have been published in the Geology and Minerals journal.According to the Eastern State Planning Center, Russia accounts for almost 75% of global Arctic natural gas reserves. However, weather conditions create technological problems hampering gas production and transportation via pipelines, according to the scientists at Perm National Research Polytechnic University.The most effective method to eliminate these formations is to pump chemical substances inside pipelines that can slow down the formation of major clogs. However, hydrogen sulfide, an aggressive admixture to natural gas, contained in 40% of discovered gas deposits, offsets the effect of these chemicals. The presence of hydrogen sulfide in Arctic natural gas causes clogs even where they normally would not form, university sources added.The scientists developed a model to foresee the probability of hydrate accumulation inside pipelines for transporting natural gas with hydrogen sulfide at preset temperatures and pressure. Arctic gas pipelines are usually subjected to pressure ranging between 56 and 122 atmospheres, and temperatures between +9°C and +15°C.“Our experiments determined optimal pressure and temperature levels when hydrates do not form inside the gas and hydrogen sulfide mixture. We also developed mathematical models to foresee these processes. As the main outcome, our calculations only show 0.5% deviation from real laboratory data,” Director of the university’s Kogalym branch Vladimir Poplygin noted. He added that the current models deviated from preset levels by 7-8% in the calculation of parameters for LNG and hydrogen sulfide.The research project was completed with the support of the Russian Ministry of Science and Higher Education.
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Perm researchers can predict gas pipeline ice clogging
Experts at Perm National Research Polytechnic University have learned to foresee ice clogging inside gas pipelines with an accuracy of 99.5%. Their findings have been
published in the Geology and Minerals journal.
According to the Eastern State Planning Center, Russia accounts for almost 75% of global Arctic natural gas reserves. However, weather conditions create technological problems hampering gas production and transportation via pipelines, according to the scientists at Perm National Research Polytechnic University.
“Solid crystal compounds resembling ice accumulate during gas production and transportation via pipelines, due to high pressure and low temperatures. They build up on pipeline walls, eventually clogging the pipelines completely. Gas production has to be stopped as a result, leading to accidents and multi-billion-ruble losses,” the scientists noted.
The most effective method to eliminate these formations is to pump chemical substances inside pipelines that can slow down the formation of major clogs. However, hydrogen sulfide, an aggressive admixture to natural gas, contained in 40% of discovered gas deposits, offsets the effect of these chemicals. The presence of hydrogen sulfide in Arctic natural gas causes clogs even where they normally would not form, university sources added.
The scientists developed a model to foresee the probability of hydrate accumulation inside pipelines for transporting natural gas with hydrogen sulfide at preset temperatures and pressure. Arctic gas pipelines are usually subjected to pressure ranging between 56 and 122 atmospheres, and temperatures between +9°C and +15°C.
“Our experiments determined optimal pressure and temperature levels when hydrates do not form inside the gas and hydrogen sulfide mixture. We also developed mathematical models to foresee these processes. As the main outcome, our calculations only show 0.5% deviation from real laboratory data,” Director of the university’s Kogalym branch Vladimir Poplygin noted. He added that the current models deviated from preset levels by 7-8% in the calculation of parameters for LNG and hydrogen sulfide.
The research project was completed with the support of the Russian Ministry of Science and Higher Education.
