摘要
在自行搭建的实验台上利用恒压预冷法研究了不同压力(5.3 MPa、6.8 MPa7、.9 MPa)、恒定温度(273 K)下甲烷水合物在冰粉(154—300μm)与石英砂(154—300μm)混合物中的生成过程。结果表明:甲烷水合物在此混合物中聚集生长;压力对反应中期冰粉的转化速度有影响,其随压力的升高而呈指数级加快,但压力对最终的冰粉转化率影响不大。与甲烷水合物在冰粉中的生成过程进行比较发现:石英砂的存在提高了冰粉转化速率和最终冰粉转化率(约80%);基于冰粉中水合物生成的敛核模型或原位偏离模型,不能很好地解释本实验条件下的实验现象。
The formation of methane hydrate in a mixed system of ice powders and sand was studied at 273 K and at different pressure（5.3 MPa,6.8 MPa,7.9 MPa）. The results showed that the formation of methane hydrate was in the shape of aggregation, the vdocity of the reaction increased exponentially and the hydrate mole fraction could reach 80%, the sand increased the vdocity of the formation of methane hydrate and the hydrate mole fraction. Both the shrinking modal and the swdling modal based on the condition of pure ice powders were not suitable for the condition of mixture of ice powders and sand.
出处
《武汉理工大学学报》
EI
CAS
CSCD
北大核心
2007年第3期86-89,共4页
Journal of Wuhan University of Technology
基金
中国科学院知识创新项目(KZCX3-SW-224)
关键词
甲烷水合物
冰粉
石英砂
聚集生成
methane hydrate
ice powder
sand
aggregation formation
