摘要
基于水合物法的二氧化碳气体地层封存和固化技术是实现温室气体减排的有效方法之一。进行液化条件下多孔介质水合物的生成过程及其生成特性研究,有助于进一步丰富不同相态CO_(2)的地层存储规律。为此,利用气体水合物生成与分解模拟实验装置研究了粒径分别为24、32、40、60目4种不同的石英砂体系中多孔介质水合物的生成过程,实验温度选定276.5 K,初始压力为4.85 MPa。结果表明:在液化条件下,水合物生成的诱导时间随多孔介质粒径的减小而缩短,并且当粒径减小到40目附近时,诱导时间将急剧减小,与32目的石英砂体系相比,此时诱导时间明显缩短超过2/3;多孔介质对水合物生成速率和储气量的影响较为显著且存在一临界粒径尺寸,在40目的石英砂介质中,液化条件下水合物的最大生成速率和储气量分别达到了12.35×10-4 mol/h和30.599 L/L。
The technology of carbon dioxide geological storage and solidification based on gas hydrate method has been considered to be an effective way to reduce greenhouse gas emissions.And the study on the formation process and characteristics of hydrate in porous media under liquefaction condition is helpful to further enrich the formation storage rule of CO_(2) in different phases.To this end,with the simulation experimental equipment of gas hydrate formation and decomposition used,the experiment of CO_(2) hydrate formation was conducted in porous media of quartz sand with the particle size of 24,32,40 and 60 mesh,respectively.The experimental temperature was fixed at 276.5 K and the initial pressure was 4.85 MPa.The results show that the induction time of hydrate formation shorten with the particle size of porous media decrease under the condition of liquefaction.The induction time reduces sharply as the particle size is around 40 mesh and it shorten even more 2/3 compared with the particle size 32 mesh at this time.Meanwhile,the formation rate and gas storage capacity of hydrate are affected significantly by the porous media,and there is a critical particle size in this process.In addition,under the condition of liquefaction and the quartz sand medium of 40 mesh,the maximum formation rate of hydrate and gas storage capacity reaches 12.35×10-4 mol/h and 30.599 L/L,respectively.
作者
张学民
王佳贤
张梦军
李银辉
李金平
王英梅
ZHANG Xue-min;WANG Jia-xian;ZHANG Meng-jun;LI Yin-hui;LI Jin-ping;WANG Ying-mei(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)
出处
《科学技术与工程》
北大核心
2021年第30期12930-12938,共9页
Science Technology and Engineering
基金
国家自然科学基金(51906093)
甘肃省高等学校创新能力提升项目(2019A-019)
甘肃省工业绿色低碳转型升级研究项目(GGLD-2019-058)
中科院天然气水合物重点实验室开放基金(Y907ke1001)
兰州理工大学“红柳优秀青年人才支持计划”(Q201809)。
关键词
二氧化碳水合物
多孔介质
液化
诱导时间
储气量
生成速率
carbon dioxide hydrate
porous media
liquefaction
induction time
gas storage
generation rate
