A method for properties evaluation of activated charcoal sorbents in iodine capture under dynamic conditions

Improvement of Quality Control Methods for Filters’ Adsorbents in Purification of Gas Emissions of Nuclear Power Plants

“…Gas chromatographyy (GC) methods are not specified. In [4], the methods of performing measurements to determine the adsorption capacity of adsorbents using radioactive CH 3 J vapors are considered, and the scheme of the measuring installation is described. In this case, equipment is used to measure the radioactivity of the adsorber sections with the adsorbent.…”

“…These emissions must be discharged into the surrounding atmosphere after appropriate purification [2] using various adsorbents (activated carbons, silica gels, alum gels, zeolites) in special filters [3]. Quality control of such adsorbents before loading them into adsorption filters and during their operation is a prerequisite for reliable operation of gas purification systems for NPP emissions [4]. One of the main types of quality control of these adsorbents is to determine the aerodynamic drag of adsorbents to the flow of gaseous air [5] and the adsorption capacity of adsorbents for vaporous impurities of radioactive iodomethane (CH3J) [4].…”

“…Quality control of such adsorbents before loading them into adsorption filters and during their operation is a prerequisite for reliable operation of gas purification systems for NPP emissions [4]. One of the main types of quality control of these adsorbents is to determine the aerodynamic drag of adsorbents to the flow of gaseous air [5] and the adsorption capacity of adsorbents for vaporous impurities of radioactive iodomethane (CH3J) [4]. The emergence of various brands of adsorbents and an increase in their quality require improving the schemes and designs of installations for determining the aerodynamic drag and adsorption capacity of adsorbents.…”

Evaluating the Physisorption and Chemisorption of Iodine on Bismuth-Functionalized Carbon Foams

“…The considerable challenge of capturing iodine from the off-gas stream has been approached using many different chemical methods, including solution-based processes and solid sorbents. , In regard to sorbent substrates, several viable candidate materials have been identified, such as zeolites, − silica aerogels, − and carbon-based materials. − Silica aerogels offer promising properties as sorbent, such as easy functionalization, pore-tunability, , and the ability to be transformed into a chemically and mechanically durable waste form . Unfortunately, the friable nature of the nanostructured silica skeleton of these materials complicates their deployment as iodine off-gas adsorbents.…”