Study on the formation of CO2 hydrate promoted by amino acids in natural sand system
It is a promising technology to store CO2 by hydrate formation in seafloor sediments.In this paper,the evolution process of CO2 hydrate formation promoted by amino acids in natural sand system was studied by hydrate formation test in a visible reactor.The experimental results showed that the formation rate and amount of CO2 hydrates in 8 mmol/L L-methionine solution were significantly higher than those in deionized water system;The natural sand with medium particle size had the best promotion effect on the formation of CO2 hydrate,and a large amount of CO2 hydrates were generated in it,which effectively filled the gap between natural sands;Secondly,a lot of CO2 hydrates were also generated in small size natural sand;The effect of large particle size natural sand on promoting the formation of CO2 hydrate was not obvious,and no obvious CO2 hydrate formation was found inside,only a small amount of CO2 hydrates was observed on the inner wall of the reactor.
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