TY  - JOUR
AU  - Jiao, Facun
AU  - Kinoshita, Norikazu
AU  - Kawaguchi, Masato
AU  - Asada, Motoyuki
AU  - Honda, Maki
AU  - Sueki, Keisuke
AU  - Ninomiya, Yoshihiko
AU  - Sergeev, Dmitry
AU  - Bläsing, Marc
AU  - Müller, Michael
TI  - Synergistic Mechanisms of CaCl 2 and CaO on the Vaporization of Cs from Cs-Doped Ash during Thermal Treatment
JO  - Energy & fuels
VL  - 32
IS  - 4
SN  - 1520-5029
CY  - Columbus, Ohio
PB  - American Chemical Society
M1  - FZJ-2018-03922
SP  - 5433 - 5442
PY  - 2018
AB  - This study aimed to clarify the roles of CaCl2, CaO, and their mixture in the vaporization of Cs from Cs-doped ash during thermal treatment. In particular, potential mechanisms of the synergistic effect of the addition of a mixture of CaCl2 and CaO on Cs vaporization were investigated. Vaporization experiments were carried out in a lab-scale horizontal furnace at 900, 1000, and 1100 °C. The results indicated that adding a mixture of CaCl2 and CaO produced a synergistic effect on Cs vaporization when the reaction temperature was above 1000 °C and the vaporization ratio was noticeably increased in comparison to that when adding CaCl2 or CaO alone. The formation of wadalite (Ca6Al5Si2O16Cl3) and/or igumnovite [Ca3Al2(SiO4)2Cl4], derived from chemical reactions among CaCl2, CaO, and aluminosilicates in the Cs-doped ash, delayed the release of Cl during thermal treatment, thus extending the contact time of Cs and gaseous Cl. Furthermore, CaO destabilized the aluminosilicate structure, resulting in a higher volatility and reactivity of Cs, and thus, a reaction readily occurred between activated Cs and gaseous Cl released from the decomposition of wadalite and/or igumnovite.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000430783300142
DO  - DOI:10.1021/acs.energyfuels.8b00620
UR  - https://juser.fz-juelich.de/record/849819
ER  -