Study on the formation mechanism of CO2 hydrate under the action of nanoparticles
Gas hydrate technology has broad application prospects in the seawater desalination,hydrate cold storage,carbon dioxide storage,etc.The rapid hydrate formation is considered to be one of the key issues restricting the application of hydrate technology.The self-built CO2 hydrate visual generation experimental device was used to conduct experimental research on the CO2 hydrate generation characteristics in nanofluids,and the impact of nanoparticles on the CO2 hydrate generation characteristics was analyzed.The results show that in the nanofluidic system,the gas consumption is increased by 2.17 mmol/mol but the induction time is shortened by 277.5 min,comparing with pure water.A study on the characteristics of CO2 hydrate formation in different types of nanofluids found that the induction time of hydrate formation in copper oxide nanofluids was the shortest,only 179 min.There is an optimal concentration of CO2 hydrate promotion with copper oxide nanofluids.The gas consumption of CO2 hydrate increases firstly and then decreases with the increment in the mass fraction of copper oxide nanofluids.There are great differences in the morphological images of CO2 hydrate formation in different nanofluids.
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