Synthesis of FER zeolite with piperidine as structure-directing agent and its catalytic application

Direct synthesis of ultrathin FER zeolite nanosheets via a dual-template approach

“…The total BET surface area (359 m 2 g −1 ), total pore volume (0.28 cm 3 g −1 ) and micropore volume (0.14 cm 3 g −1 ) are all close to those reported in the previous researche. 35 The external specific surface area is 18 m 2 g −1 , which contributes little to the total specific surface area. In contrast, SCM-37 shows a type IV isotherm along with a moderate uptake of N 2 in a medium relative pressure range, as well as a remarkable capillary condensation step above a relative pressure of 0.9 due to the inter-crystal voids arising from the stacking of nanosheet crystals.…”

Advances in the Synthesis of Ferrierite Zeolite

“…Recently, a pure phase of aluminosilicate FER zeolite with high crystallinity could be directly synthesized with the use of Pi as an organic template by carefully adjusting the ratio of the starting gel. The obtained product exhibited good catalytic performance in the skeletal isomerization reaction of 1-butene [6]. Meanwhile, Long's group reported the successful synthesis of FER zeolite with the use of THF as an organic template under the hydrothermal and VPT condition [36].…”

“…In the zeolite synthesis, the application of organic templates has many advantages such as reducing the crystallization temperature and time, increasing the Si/Al ratio of the products, adjusting the properties of the products and so on. So far, a variety of organic templates, including alkylamines, cyclic amines, and alcohols have been reported to be used in the synthesis of aluminosilicate FER zeolites [ 6 , 18 , 20 , 26 , 27 , 29 , 32 , 36 , 37 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 ]. The detailed information of organic templates for synthesizing FER zeolite is shown in Table 2 .…”

“…Other than the THP as an organic template for synthesizing FER zeolites, some other cyclic molecules, which have the similar molecular structure to THP, such as pyridine (Py) [ 57 , 58 ], piperidine (Pi) [ 6 , 29 , 37 ], tetrahydrofuran (THF) [ 26 , 36 , 60 ], N , N -diethyl- cis -2,6-dimethyl piperidinium (DMPi) [ 18 , 61 ] and 1,3-dimethyimidazolium (DMI) [ 62 , 63 ] could also be used as the organic templates in the synthesis of aluminosilicate FER zeolites. For example, in 1989, Smith et al reported the hydrothermal synthesis of aluminosilicate FER zeolite with the range of Si/Al ratios at 15.1–19.3 using Py as an organic template [ 57 ].…”

“…Zeolites are crystalline microporous materials which have been widely applied on an industrial scale in heterogeneous catalysis, adsorption, separation and ion exchange in the past decades [ 1 , 2 , 3 , 4 , 5 ]. Among them, Ferrierite (FER) zeolite is one of the industrialized types, which has excellent catalytic properties in skeletal isomerization of n-alkene, methanol to olefin, N 2 O decomposition, CO 2 hydrogenation, dehydration of methanol or ethanol, dimethyl ether carbonylation, and so on [ 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ].…”