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Enhanced Mass Transfer by Density-Driven Convection during CO2 Geological Storage
Industrial & Engineering Chemistry Research ( IF 4.2 ) Pub Date : 2020-04-02 , DOI: 10.1021/acs.iecr.0c00525 Sijia Wang 1 , Yu Liu 1 , Yuechao Zhao 1 , Yi Zhang 1 , Lanlan Jiang 1 , Bin Yu 2 , Yong Yin 2 , Yongchen Song 1
Industrial & Engineering Chemistry Research ( IF 4.2 ) Pub Date : 2020-04-02 , DOI: 10.1021/acs.iecr.0c00525 Sijia Wang 1 , Yu Liu 1 , Yuechao Zhao 1 , Yi Zhang 1 , Lanlan Jiang 1 , Bin Yu 2 , Yong Yin 2 , Yongchen Song 1
Affiliation
CO2 capture and storage (CCS) is an effective way to reduce greenhouse gas emissions. Density-driven background flow in some deep saline aquifers is of interest in the geoengineering field, which can enhance dissolution rates compared with the diffusion process. This study aimed to investigate the instability of dissolution-driven convection using high-resolution magnetic resonance imaging (MRI) technology under injection conditions. A detailed discussion on the instability of the displacement front is presented. As the Rayleigh number (Ra) increased, the onset time decreased, and the finger number density increased, while the finger growth velocity increased with increasing Péclet number (Pe). Moreover, increasing the injection rate is beneficial to the mass flux for the same value of Ra. The transverse dispersion coefficient (DT)–Pe curve in the range of 2.34 < Pe < 33.09 agrees with previous studies. The results provide a theoretical basis for dissolution-driven convection in CCS projects.
中文翻译:
CO 2地质存储过程中通过密度驱动对流增强了质量传递
CO 2捕获和存储(CCS)是减少温室气体排放的有效方法。在地球工程领域中,一些深层盐水含水层中的密度驱动背景流是令人关注的,与扩散过程相比,它可以提高溶出速率。这项研究的目的是调查使用高分辨率磁共振成像(MRI)技术在注入条件下溶解驱动对流的不稳定性。详细介绍了位移前沿的不稳定性。随着瑞利数(Ra)的增加,发病时间减少,并且手指数密度增加,而手指的生长速度随Péclet数(Pe)。此外,对于相同的Ra,增加注入速率对质量通量是有益的。横向弥散系数(D T)– Pe曲线在2.34 < Pe <33.09的范围内与先前的研究一致。研究结果为CCS项目中溶蚀驱动的对流提供了理论依据。
更新日期:2020-04-02
中文翻译:
CO 2地质存储过程中通过密度驱动对流增强了质量传递
CO 2捕获和存储(CCS)是减少温室气体排放的有效方法。在地球工程领域中,一些深层盐水含水层中的密度驱动背景流是令人关注的,与扩散过程相比,它可以提高溶出速率。这项研究的目的是调查使用高分辨率磁共振成像(MRI)技术在注入条件下溶解驱动对流的不稳定性。详细介绍了位移前沿的不稳定性。随着瑞利数(Ra)的增加,发病时间减少,并且手指数密度增加,而手指的生长速度随Péclet数(Pe)。此外,对于相同的Ra,增加注入速率对质量通量是有益的。横向弥散系数(D T)– Pe曲线在2.34 < Pe <33.09的范围内与先前的研究一致。研究结果为CCS项目中溶蚀驱动的对流提供了理论依据。