Comparative study of CHA- and AEI-type zeolytic catalysts for the conversion of chloromethane into light olefins

The investigation of the NH3-SCR performance of a copper-based AEI-CHA intergrown zeolite catalyst

“…Figure 4B shows the temperature-programmed ammonia desorption curves of the series of copper-based SAPO-34/SAPO-18 zeolite catalysts. The three main characteristic peaks were attributed to weak, medium-strong, and strong acid sites, respectively ( Pérez-Uriarte et al, 2016 ; Xu et al, 2017 ; Shin et al, 2018 ). The weak acid site at low temperatures corresponded to a weak Lewis acid (T = 220°C), the medium strong acid site at middle temperatures corresponds to strong Lewis acids and some active copper species sites (T = 420°C), and the strong acid adsorption site at high temperatures corresponded to a Brønsted acid (T = 510°C).…”

Advances in the synthesis and application of the SSZ-39 zeolite

“…Besides the two above mentioned catalytic applications, the SSZ-39 zeolite could also be applied to several other applications. 56,[74][75][76][77][78][79][80][81][82] Tian et al reported that the SSZ-39 zeolite doped with Eu 2+ cations had strong tuneable blue emission and good thermal stability, which suggested a potential application of the Eu-SSZ-39 zeolite in light-emitting diode (LED) phosphors (Fig. 8).…”

Controlled electropositive catalytic sites on zeolites for achieving high CH3Cl selectivity via electrophilic CH4 chlorination using Cl2

“…The C 2 H 6 may be produced from the conversion of in situ formed CH 3 Cl that can be coupled to form C 2 H 6 on the acidic catalytic sites on the zeolite wall as reported in the literature. 14,15,53 The design of tandem catalysts for converting CH 4 to hydrocarbons via CH 3 Cl as the intermediate under the chlorination condition is in progress in this laboratory.…”