| 多孔介质内气泡熟化特性孔隙尺度研究 |
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| 引用本文： | 周志毅,王进卿,王广鑫,池作和,翁煜侃. 多孔介质内气泡熟化特性孔隙尺度研究[J]. 化工进展, 2022, 41(3): 1265-1271. DOI: 10.16085/j.issn.1000-6613.2021-1831 |
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| 作者姓名： | 周志毅 王进卿 王广鑫 池作和 翁煜侃 |
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| 作者单位： | 中国计量大学计量测试工程学院，浙江 杭州 310018 |
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| 基金项目： | 浙江省自然科学基金（Q20E060017）；;国家自然科学基金（52006207）； |
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| 摘 要： | 多孔介质内的气泡熟化行为广泛存在于CO2封存等领域，为探究多孔介质内气泡的熟化特性，本文采用空气作为模拟气体，通过可视化实验和数值计算，对双孔隙和四孔隙气泡熟化过程进行了研究，阐释了多孔介质非均质性对熟化过程的影响规律。结果表明：在双孔隙气体饱和度较小情况下，虽然也发生正向熟化，但是孔隙结构的存在使熟化速率明显低于自由流体情况；四孔隙研究显示多孔介质非均质性对气泡熟化过程影响显著，由于孔隙的几何限制，气泡在某些情况下会发生逆Ostwald熟化，即生长的气泡在充满当前孔隙空间后会停止生长并反向熟化导致尺寸缩小；在非均质多孔介质中，由于熟化作用，气泡有传质到大孔隙区域趋势，导致大孔隙区域富集大气泡，存在泄漏风险，从而影响封存。
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| 关 键 词： | CO2毛细封存 Ostwald熟化 非均质多孔介质 传质 数值模拟 |
| 收稿时间： | 2021-08-26 |
Study on pore size of bubble maturation characteristics in porous media |
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| ZHOU Zhiyi,WANG Jinqing,WANG Guangxin,CHI Zuohe,WENG Yukan. Study on pore size of bubble maturation characteristics in porous media[J]. Chemical Industry and Engineering Progress, 2022, 41(3): 1265-1271. DOI: 10.16085/j.issn.1000-6613.2021-1831 |
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| Authors: | ZHOU Zhiyi WANG Jinqing WANG Guangxin CHI Zuohe WENG Yukan |
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| Affiliation: | College of Metrology & Measurement Engineering, China Jiliang University, Hangzhou 310018, Zhejiang, China |
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| Abstract: | Ostwald ripening behavior widely exists in bubbles in porous media. In order to explore the ripening characteristics of bubbles in porous media, air was used as the simulation gas to study the ripening process of double porosity and four porosity bubbles through visualization experiment and numerical calculation, and the influence of heterogeneity of porous media on the ripening process was explained. The results showed that although the double porosity gas saturation was small, the forward ripening also occurred. However, due to the existence of pore structure, the ripening rate was obviously lower than that of free fluid. The four porosity study showed that the heterogeneity of porous media had a significant effect on the bubble ripening process. Due to the geometric constraints of pores, the bubble will undergo reverse Ostwald ripening in some cases, that is, the growing bubble will stop growing and reverse ripening after filling the pore space, resulting in the size reduction. In heterogeneous porous media, due to ripening, bubbles tend to transfer to the macropore area, which led to the enrichment of macrobubbles in the macropore area and the risk of leakage, thus affecting the storage. |
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| Keywords: | CO2 capillary storage Ostwald ripening heterogeneous porous media mass transfer numerical simulation |
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