摘要
石墨因其良好的综合性能被广泛用于核工业,截至目前全球现存放射性废石墨超过25万吨,但各国并未开发出能被广泛接受的处理方式。放射性废石墨焚烧处理被广泛研究并已验证该工艺可行,但焚烧过程中会产生^(14)CO_(2),而^(14)CO_(2)的处理成为当前制约废石墨焚烧技术发展的主要问题之一。随着碳中和目标的提出,碳捕集与封存技术有了长足发展,有学者提出可使用碳封存工艺处理^(14)CO_(2),本文主要针对各碳封存技术应用于处理^(14)CO_(2)可能面临的风险因素进行探讨。表明:海洋封存^(14)CO_(2)现阶段不具备合法性;工业利用的封存周期过短,不适宜处理^(14)C;矿石碳化能将^(14)CO_(2)固定为稳定的碳酸盐,但存在增容增重的问题;地质封存中深部咸水层封存埋藏深度最深能至地下数千米,在理论上存在一定可行性,但仍需开展深入研究。
Graphite is widely used in the nuclear industry due to its excellent comprehensive performance.As of now,there are over 250000 tons of radioactive waste graphite worldwide,but countries have not developed a widely accepted treatment method.The incineration treatment of radioactive waste graphite has been widely studied and verified to be feasible.However,the incineration process produces^(14)CO_(2),and the treatment of^(14)CO_(2)has become one of the main problems currently restricting the development of waste graphite incineration technology.Scholars have proposed using carbon sequestration technology to treat^(14)CO_(2).This article mainly explores the potential risk factors that may arise from applying various carbon sequestration technologies to treat^(14)CO_(2).Indicating that marine storage of^(14)CO_(2)currently does not have legitimacy;The storage cycle for industrial utilization is too short and not suitable for treating C14;Carbonization of ores can fix^(14)CO_(2)into stable carbonates,but there is a problem of increasing capacity and weight;The burial depth of deep saline water layers in geological sealing can reach several thousand meters underground,which is theoretically feasible,but further research is still needed.
作者
高东亮
徐卫
张禹
赵世杰
袁永太
郑博文
Gao Dongliang;Xu Wei;Zhang Yu;Zhao Shijie;Yuan Yongtai;Zheng Bowen(China Institute of Radiation Protection Department of Radioactive Waste Management,Taiyuan 030000,China)
出处
《广东化工》
2025年第14期55-57,47,共4页
Guangdong Chemical Industry
关键词
放射性废石墨
C14
焚烧
碳封存
地质封存
radioactive waste graphite
C14
incineration
carbon sequestration
geological sequestration
