Yang Hee-Chul, Cho Yong-Jun, Eun Hee-Chul, Kim Eung-Ho
Nuclear Fuel Cycle R&D Group, Korea Atomic Energy Research Institute, P.O. Box 105, Yuseong, Daejeon 305-600, Republic of Korea.
Chemosphere. 2008 Aug;73(1 Suppl):S311-5. doi: 10.1016/j.chemosphere.2008.03.045. Epub 2008 May 22.
Molten salt oxidation (MSO) is one of the promising alternative destruction technologies for chlorinated organics, because it is capable of trapping chlorine during organic destruction. This study investigated the characteristics of a two-stage MSO reactor system for the destruction of CCl(4) and C(6)H(5)Cl. Investigated parameters were the MSO reactor temperature (from 1023 K to 1223 K) and the excess oxidizing air feed rate (50% and 100%). The destruction of chlorinated solvents is substantial in the Li(2)CO(3)-Na(2)CO(3) eutectic molten salt, irrespective of the tested condition. However, further oxidation of CO, which is found to be the major destruction product, is not substantial due to the limited temperature and gas residence time in the MSO reactor. Increases in the reactor temperature as well as those in the oxidizing air feed rate consistently lead to decreased emissions of carbon monoxide. No significant influence of the MSO reactor operating condition on the chlorine capturing efficiency was found. Over 99.95% and 99.997% of the chlorine was captured in the hot MSO reactors during the C(6)H(5)Cl and CCl(4) destructions, respectively. This result suggests a relatively low potential of the MSO system in the recombination of chlorinated organics, when compared to a conventional incineration system.
熔盐氧化（MSO）是一种很有前景的用于处理氯化有机物的替代销毁技术，因为它能够在有机物销毁过程中捕获氯。本研究调查了用于销毁四氯化碳（CCl₄）和氯苯（C₆H₅Cl）的两级MSO反应器系统的特性。研究参数包括MSO反应器温度（从1023 K到1223 K）和过量氧化空气进料速率（50%和100%）。在Li₂CO₃ - Na₂CO₃共晶熔盐中，无论测试条件如何，氯化溶剂的销毁效果都很显著。然而，由于MSO反应器中温度和气体停留时间有限，作为主要销毁产物的一氧化碳的进一步氧化并不显著。反应器温度的升高以及氧化空气进料速率的增加均会持续导致一氧化碳排放量的降低。未发现MSO反应器操作条件对氯捕获效率有显著影响。在氯苯和四氯化碳销毁过程中，分别有超过99.95%和99.997%的氯在热MSO反应器中被捕获。与传统焚烧系统相比，该结果表明MSO系统在氯化有机物再结合方面的潜力相对较低。
