二氧化碳水合物浆在圆管中的流动特性  

Flow properties of CO_2 hydrate slurry in circular tube

作　　者：刘妮[1] 戴海凤[1] 余宏毅[1] 由龙涛[1] 

机构地区：[1]上海理工大学能源与动力工程学院,上海200093

出　　处：《化工学报》2014年第2期550-554,共5页CIESC Journal

基　　金：国家自然科学基金项目(50706028);上海市教委科研创新项目(12YZ106)~~

摘　　要：实验研究了固相分数为8.2%～23.1%的CO2水合物浆在内径为8 mm的圆管中的流动特性。结果发现水合物浆在管内的流动压降随着流速的增加而增大。当流速低于0.60 m·s-1时，浆体流变指数小于1，且随着固相体积分数的增大而减小，CO2水合物浆为H-B流体，其表观黏度随着流速的增大而减小，呈剪切变稀特性。剪切速率为600 s-1时，CO2水合物浆的表观黏度为8.5～10.6 mPa·s。实验得到了CO2水合物浆的流变特征参数及其流变方程，可为CO2水合物浆的流动及其应用研究提供理论指导。An experimental setup was established to produce CO2 hydrate slurry by cooling after CO2 injection in precooled water. The flow characteristics of CO2 hydrate slurry with 8.2%-23.1%（vol） in a 8 mm straight stainless steel circular tube were studied in a dynamic loop. The pressure drops of CO2 hydrate slurry were measured and it increased with the increase of flow rate. The flow of CO2 hydrate slurry presente non-Newtonian behavior. At flow rate v＆lt;0.60 m·s-1, behavior index n＆lt;1 and decreased with the increase of solid fraction. CO2 hydrate slurry behaved as a Herschel-Bulkley fluid. Apparent viscosity decreased with the increase of shear rate, showing shear-thinning characteristics. Apparent viscosity of CO2 hydrate slurry was from 8.5 mPa·s to 10.6 mPa·s at shearing rate of 600 s-1. The rheological parameters and equations were determined, providing the guide for the research of CO2 hydrate slurry flow properties and its application.

关 键 词：二氧化碳 水合物浆 流动 压降 黏度 

分 类 号：TQ031[化学工程]