Migration behavior of heavy metals in coal fly ash-derived Cu-SSZ-13 during synthesis and NH3-SCR application

Solvent-free synthesis of FAU zeolite from coal fly ash

“…Notably, impurities such as Fe 2 O 3 , TiO 2 and K 2 O do not influence the synthesis of FAU zeolite, and do not need to be removed in the synthesis. The mineral phases present in CFA were identified by XRD as quartz (SiO 2 ) and mullite (3Al 2 O 3 •2SiO 2 ), together with some amorphous silica, as shown in Fig.S1, † in good agreement with the literature 34,[39][40][41]. Fig.…”

“…S1,† in good agreement with the literature. 34,39–41 Fig. S2† shows SEM images of CFA, indicating spherical particles with different diameters.…”

Synthesis of ZSM-5 Zeolites from Quang Ninh Coal Ash Components and Activity for Catalytic Cracking of Low-density Polyethylene

“…The stability of CFA-based β-zeolite in the hot liquid phase was assessed 57),58) . SSZ-13 prepared from CFA was ion-exchanged with Cu and used for NH3-SCR, in which the Cu-SSZ-13 absorbed hazardous heavy metals of Pb, Cr, and Cd within the structure and showed high performance during NH3-SCR 59) . MCM-41 prepared from CFA and successive modification by a silane with an amino group formed NH2-MCM-41 nanoparticles which were dispersed in diethylenetriamine (DETA) by ultrasonic dispersion 60) .…”