Scientific and Engineering Literature Mini Review of Molten Salt Oxidation for Radioactive Waste Treatment and Organic Compound Gasification as well as Spent Salt Treatment

Abstract

Literature review was performed for the molten salt oxidation technology in order to collect all available scientific and engineering information for further use of this technology in nuclear applications. This report provides a summary of a review of scientific and engineering literature on MSO treatment of a wide variety of radioactive wastes, organic compound gasification, and related studies such as radioactive spent salt processing that was found important for further development of the MSO technology in the nuclear field for radioactive waste treatment. Miscellaneous nonnuclear uses of molten salts, such as converting carbon monoxide to carbon dioxide, are not discussed.

Preparation and reactivation of magnetic biochar by molten salt method: Relevant performance for chlorine-containing pesticides abatement

“…Hydrocarbons are converted to carbon dioxide and steam (Kovarik, Navratil, and John 2015). Meanwhile, acid gases cannot escape from the trap of alkaline molten medium, leading to a harmless effect on the atmosphere (eqs 9-10).…”

Degradation mechanisms of organic compounds in molten hydroxide salts: a radical reaction yielding H2 and graphite

“…Therefore, new treatments have to be developed to treat and valorise these wastes. In recent years, the Molten Salt Oxidation process (MSO) using molten carbonates has been put forward for the gasification of organic wastes 2 and even chlorinated organics. 3,4 This pyrochemical process allows the treatment of wastes at lower temperatures than incineration, with the absorption of acid gases, 5 absence of carbon monoxide gas emission 6 and degradation of fumes without any formation of dioxins.…”

Feasibility Study on A Novel Waste Heat Recovery Process of Industrial Waste Salt Based on High Temperature Melting Dry Method

“…The high temperature melting method uses the temperature higher than the melting point of the waste salt (usually 800-1200℃) to completely melt the waste salt into a liquid state, and completely removes the organic matter. Due to the high temperature, this method avoids the softening temperature range of salt, prevents salt from forming circles and agglomeration in equipment and pipelines, and enables the removal effect of organic matter to reach more than 99% [3] . At present, the resource utilization of high-temperature molten industrial waste salt mainly adopts the rotary kiln treatment process (Figure 1), and its main process flow is:…”