CO_(2)地质利用与封存(CO_(2) geological utilization and storage,CGUS)是实现“碳中和”目标的重要技术手段,解决CGUS过程中的钢材腐蚀问题对于降低CGUS技术风险、实现CGUS技术规模化推广应用至关重要。综述了目前已经提出的CO_(2)...CO_(2)地质利用与封存(CO_(2) geological utilization and storage,CGUS)是实现“碳中和”目标的重要技术手段,解决CGUS过程中的钢材腐蚀问题对于降低CGUS技术风险、实现CGUS技术规模化推广应用至关重要。综述了目前已经提出的CO_(2)腐蚀钢材反应机制,总结了CO_(2)腐蚀钢材的主要影响因素,阐明了CO_(2)分压、温度、矿化度及pH值、CO_(2)封存环境中含有杂质、流体流动等因素对钢材腐蚀行为的影响,归纳了适用于CO_(2)腐蚀钢材防护的主要措施。基于此,提出了CGUS环境下钢材遭受CO_(2)腐蚀问题的重点研究方向。主要包括:CO_(2)腐蚀钢材反应机制的进一步探究;各项环境因素耦合作用影响CO_(2)腐蚀规律和腐蚀程度的量化研究;高浓度CO_(2)条件下腐蚀防护技术的开发与应用。展开更多
In order to improve CO_(2) capture,utilization and storage(CCUS) to solve carbon emission,sandstone from the Triassic Liujiagou Formation(LF) from the Ordos Basin in China was investigated using permeability tests and...In order to improve CO_(2) capture,utilization and storage(CCUS) to solve carbon emission,sandstone from the Triassic Liujiagou Formation(LF) from the Ordos Basin in China was investigated using permeability tests and computed X-ray tomography(CT) scanning.The presence of reactive minerals within the geological CO_(2) sequestration target storage formation can allow reaction with injected CO_(2),which changes the porosity and permeability of the LF beds,affecting storage effectiveness.To investigate the effect of chemical reactions on the pore structure and permeability of sandstone cores representing the LF CO_(2) storage,tests were conducted to analyze the changes in porosity and permeability of sandstone cores induced by CO_(2)-saturated brine at different reaction times(28-day maximum reaction period).Porosity and permeability of the sandstone increased after reaction with CO_(2)-saturated brine due to mineral dissolution.The sandstone exhibited an increase in porosity and permeability after 15 days of reaction with CO_(2)-saturated brine.Moreover,there was an increase in the volume of large pores in the sandstone after the 28-day period.The pore network of the sandstone was established through CT results,and the porosity calculated based on the obtained pore network was close to that measured in the test,demonstrating the feasibility to use CT to study the evolution of the microstructure of sandstone after long-time exposure to CO_(2)-saturated brine.展开更多
文摘CO_(2)地质利用与封存(CO_(2) geological utilization and storage,CGUS)是实现“碳中和”目标的重要技术手段,解决CGUS过程中的钢材腐蚀问题对于降低CGUS技术风险、实现CGUS技术规模化推广应用至关重要。综述了目前已经提出的CO_(2)腐蚀钢材反应机制,总结了CO_(2)腐蚀钢材的主要影响因素,阐明了CO_(2)分压、温度、矿化度及pH值、CO_(2)封存环境中含有杂质、流体流动等因素对钢材腐蚀行为的影响,归纳了适用于CO_(2)腐蚀钢材防护的主要措施。基于此,提出了CGUS环境下钢材遭受CO_(2)腐蚀问题的重点研究方向。主要包括:CO_(2)腐蚀钢材反应机制的进一步探究;各项环境因素耦合作用影响CO_(2)腐蚀规律和腐蚀程度的量化研究;高浓度CO_(2)条件下腐蚀防护技术的开发与应用。
基金the funding support provided by the National Natural Science Foundation of China (Grant Nos. U1967208 and 42172315)。
文摘In order to improve CO_(2) capture,utilization and storage(CCUS) to solve carbon emission,sandstone from the Triassic Liujiagou Formation(LF) from the Ordos Basin in China was investigated using permeability tests and computed X-ray tomography(CT) scanning.The presence of reactive minerals within the geological CO_(2) sequestration target storage formation can allow reaction with injected CO_(2),which changes the porosity and permeability of the LF beds,affecting storage effectiveness.To investigate the effect of chemical reactions on the pore structure and permeability of sandstone cores representing the LF CO_(2) storage,tests were conducted to analyze the changes in porosity and permeability of sandstone cores induced by CO_(2)-saturated brine at different reaction times(28-day maximum reaction period).Porosity and permeability of the sandstone increased after reaction with CO_(2)-saturated brine due to mineral dissolution.The sandstone exhibited an increase in porosity and permeability after 15 days of reaction with CO_(2)-saturated brine.Moreover,there was an increase in the volume of large pores in the sandstone after the 28-day period.The pore network of the sandstone was established through CT results,and the porosity calculated based on the obtained pore network was close to that measured in the test,demonstrating the feasibility to use CT to study the evolution of the microstructure of sandstone after long-time exposure to CO_(2)-saturated brine.
基金This project is supported by the National Basic Research Program of China （＂973＂ Program） under Grant No. 2014CB339900 and the National Natural Science Foundation of China under Grant No. 61372056.
