低碳化学与化工2024，Vol.49Issue(4)：124-130,7.DOI:10.12434/j.issn.2097-2547.20230164
细粒砂矿物成分及粒径配比对CO2水合物合成特性影响的实验研究
Experimental study on influence of mineral composition and particle size ratio of fine-grained sand on synthesis characteristics of CO2 hydrate
摘要
Abstract
The use of hydrate-based technology for CO2 sequestration in permafrost layers is a promising and potential CO2 sequestration technique.In order to investigate the influence of formation properties on CO2 sequestration,CO2 hydrate synthesis experiments were conducted under the conditions of initial pressure of 5.5 MPa and temperature of 1.27℃and the influence of different mineral compositions and particle size ratio of fine-grained.The pressure-temperature changes,CO2 hydrate average synthesis rates,CO2 consumptions,and phase saturations during the CO2 hydrate formation process were analyzed during the experiment.The results show that the CO2 hydrate average synthesis rate is the smallest when the ratio of fine-grained sand to coarse-grained sand particle sizes(mass ratio of each component,the same below)is 1.0:2.0,which is 12.60 mmol/min.With the increase of coarse sand proportion,the CO2 hydrate average synthesis rate decelerateds due to the reduction of specific surface area.Montmorillonite clay is not conducive to CO2 hydrate formation,and the CO2 hydrate average synthesis rate of the silty sand group(contains fine-grained sand and coarse-grained sand)is higher than that of the silty clay group(contains fine-grained sand and montmorillonite clay).And the experiments in the silty sand group are more likely to achieve high hydrate saturation and CO2 consumption,making it more suitable for CO2 sequestration in areas with mineral compositions containing fine-grained sand and coarse-grained sand.The CO2 consumption rates for the ratio of fine-grained sand to coarse-grained sand or clay mineral particle sizes of 1.0:0.5 are 0.86 mol and 0.77 mol,respectively.With the increase of the proportion of coarse-grained sand and clay minerals,both the hydrate saturation and CO2 consumption gradually decrease.The ratio of fine-grained sand to coarse-grained sand or clay mineral particle sizes of 1.0:0.5 is suitable for CO2 sequestration using the hydrate-based method.关键词
CO2/水合物/碳封存/黏土/粒径配比Key words
CO2/hydrate/carbon sequestration/clyey-silt/particle size ratio分类
化学化工引用本文复制引用
马越,赵建忠,高强,张驰..细粒砂矿物成分及粒径配比对CO2水合物合成特性影响的实验研究[J].低碳化学与化工,2024,49(4):124-130,7.基金项目
科技部地球深部钻探与深地资源开发国际联合研究中心开放基金(DEDRD-2022-05) （DEDRD-2022-05）
博士后面上71批基金(2022M712337) （2022M712337）
山西省回国留学人员科研资助项目(2020-046). （2020-046）
