多孔介质粒径及含冰量对CO_(2)水合物生成特性的影响  

The Influence of Porous Media Particle Size and Ice Content on CO_(2) Hydrate Formation Characteristics

作　　者：张学民 张梦军[1,2,3] 张山岭 贺冠宇 李金平 王英梅[1,2,4] ZHANG Xuemin;ZHANG Mengjun;ZHANG Shanling;HE Guanyu;LI Jinping;WANG Yingmei(School of Energy and Power Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Key Lab of Complementary Energy System of Biomass and Solar Energy Gansu Province,Lanzhou 730050,China;Western China Energy&Environment Research Center,Lanzhou University of Technology,Lanzhou 730050,China;Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730050,China)

机构地区：[1]兰州理工大学能源与动力工程学院,兰州730050 [2]甘肃省生物质能与太阳能互补供能系统重点实验室,兰州730050 [3]兰州理工大学西部能源与环境研究中心,兰州730050 [4]中国科学院西北生态环境资源研究院冻土工程国家重点实验室,兰州730050

出　　处：《工程热物理学报》2022年第12期3184-3191,共8页Journal of Engineering Thermophysics

基　　金：国家自然科学基金项目(No.51906093);甘肃省高等学校创新能力提升项目(No.2019A-019);中科院天然气水合物重点实验室开放基金(No.Y907ke1001,No.E029kf1501);兰州理工大学“红柳优秀青年人才支持计划”(2018)。

摘　　要：为研究冰点以下多孔介质体系中CO_(2)水合物的生成特性,本文在初始压力3.0 MPa、温度270.15 K条件下研究了不同粒径石英砂(24目、32目和60目)以及不同含冰量(11.11%、20.00%和33.33%)对多孔介质体系中CO_(2)水合物生成特性的影响。研究结果表明:多孔介质对冰粉生成水合物具有一定的促进作用;当石英砂粒径在24~60目范围内时,石英砂的粒径越大,冰到水合物的最终转化率越高,单位体积冰的储气量越大,但在实验初始阶段,60目石英砂中CO_(2)水合物的形成速率和冰到水合物的转化率最高。研究结果还表明:当含冰量在11.11%~33.33%范围内时,含冰量越小,水合物生成过程中冰到水合物的转化率越高,转化率随时间增长越快,单位体积冰的储气量越大,冰到水合物的转化率和储气量最高分别达到了48.82%和90.58 L/L。In order to study the formation characteristics of CO_(2) hydrate in porous media below the freezing point,effects of different particle sizes of quartz sand(24 mesh,32 mesh and 60 mesh)and different ice content(11.11%,20.00% and 33.33%)on the reaction were studied under the condition of initial pressure was 3.0 MPa and temperature was 270.15 K.The results show that porous media has a certain promoting effect on the formation of hydrate with ice powder.Within the particle size of 24-60 mesh,the larger the particle size of quartz sand was,the higher the final conversion rate of ice to hydrate and the larger the amount of gas stored per unit volume of ice would be.However,in the initial stage of the experiment,the formation rate of CO_(2) hydrate and the conversion rate of ice to hydrate were the highest with the quartz sand of 60 mesh.The results also indicated that,within the range of ice content was 11.11%~33.33%,the smaller the ice content was,the higher the conversion rate of ice to hydrate during the hydrate formation process,the faster the increase of conversion rate with time and the greater the gas storage capacity of unit ice would be.And the highest conversion rate of ice to hydrate and the highest gas storage capacity reached 48.82% and 90.58 L/L,respectively.

关 键 词：CO_(2)水合物 多孔介质 含冰量 生成速率 储气量 

分 类 号：O643.1[理学—物理化学]