Abstract
Visual observation of the THF hydrate formation process in the presence of a 3A molecular sieve has been made at normal atmosphere and below a temperature of zero by microscopy. The results indicate that a 3A molecular sieve can induce the nucleation of the THF hydrate and promote the THF hydrate growth. With the existence of a 3A molecular sieve, the growth rate of THF hydrate is between 0.01 and 0.05 μm/s. In comparison with the system without any 3A molecular sieve, the growth rate increases about 4 nm/s. After the THF hydrate grows into megacryst, the crystals will recombine and partially change under the same condition.
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References
Fan S S. Storage and transport technology of natural gas hydrate, Beijing: Chemical Industry Press, 2005
Ma Y H, Gou L T, He X X, Liu F R. Kinetics research of THF hydrate at temperature up 0°C. Nat Gas Glob Sci, 2006, 17(2): 244–248
Andersson O, Suga H. Thermal conductivity of normal and deuterated tetrahydrofuran clathrate hydrates. J Phys & Chem Solids, 1995, 57: 125–132
Akiya T, Shimazaki T, Oowa M, Nakaiwa M, Nakane T, Usuda T, Ebinuma T, Kamesaki K. Formation characteristics of tetrahydrofuran hydrate to be used as a cool storage medium (in Japanese). Abstracts of 62nd Annual Meeting of the Society of Chemical Engineers, Japan, 1997(3), Tokyo, Japan, 174
Cha S B, Ouar H, Wildeman T R, Sloan E D. A third-surface effect on hydrate formation. J Phys Chem, 1988, 92(23): 6492–6494
Wilson P W, Daniel Lester, Haymet A D J. Heterogeneous nucleation of clathrates from supercooled tetrahydrofuran (THF)/water mixtures, and the effect of an added catalyst. Chem Eng Sci, 2005, 60: 2937–2941
Tian J, Zhang M H, Dong X Q. Adsorption and diffusion equilibrium research about water on 3A molecular sieve. Petr Chem Eng, 2004, 33: 932–936
Ohmura R, Ogawa M, Yasuoka K, Mori Y H. Statistical study of clathrate-hydrate nucleation in a water/hydrochlorofluorocarbon system: Search for the nature of the “memory effect”, J Phys Chem B, 2003, 107: 5289–5293
Iidaa T, Moria H, Mochizuki T, Moria Y H. Formation and dissociation of clathrate hydrate in stoichiometric tetrahydrofuran-water mixture subjected to one-dimensional cooling or heating. Chem Eng Sci, 2001, 56: 4747–4758
Kashchieva D, Firoozabadi A. Nucleation of gas hydrates. J Cryst Gr, 2002, 243: 476–489
Kvamme B. Kinetics of hydrate formation from nucleation theory. Int J Offsh, 2002, 12(4): 1053–5381
Yao L Z. Crystal growth base. China University of Science and Technology Press, 1995
Laudise R A. The growth of single crystals. Prentice-Hall, Inc, 1970
Bollavaram P, Devarakonda S, Selim M S, Sloan E D. Growth kinetics of single crystal sII hydrates. Elimination of mass and heat transfer effects. Annals of the New York Academy of Sciences, 2000, 912: 533–543
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Zang, X., Fan, S., Liang, D. et al. Influence of 3A molecular sieve on tetrahydrofuran (THF) hydrate formation. Sci. China Ser. B-Chem. 51, 893–900 (2008). https://doi.org/10.1007/s11426-008-0035-2
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DOI: https://doi.org/10.1007/s11426-008-0035-2