Multinuclear high resolution solid state NMR characterization of zeolites Nu-10 and ZSM-5 synthesized in the presence of tetraethylenepentamine and diaminopropane

Design and Synthesis of a Catalytically Active Cu-SSZ-13 Zeolite from a Copper-Amine Complex Template

“…It has been reported that TEPA is an effective template for synthesizing zeolites Nu-10 and ZSM-5 [46]. In our experiments, when TEPA was introduced in the absence of Cu 2+ , we could not get the ZJM-1 zeolite (Table 2, Runs 5-8).…”

“…UV-Vis spectra of Cu-TEPA complex in solution, Cu-ZJM-1-10, and Cal-Cu-ZJM-1-10. 由于四乙烯五胺可用作模板剂合成 ZSM-5 分 子 筛 [46] ,…”

“…TEPA 单独存在的条件下, TEPA 是以长链的形式存 在于体系中, 大约长度为 1.82 nm [46] , 这种长链构型 与 CHA 笼是不相匹配的, 因此, 不能够合成出 CHA 结构的 ZJM-1 沸石产品.…”

“…In our experiments, when TEPA was introduced in the absence of Cu 2+ , we could not get the ZJM-1 zeolite (Table 2, Runs 5-8). TEPA is a linear molecule that has a length of 1.82 nm [46], which does not match the CHA cage (0.73 nm × 1.20 nm), which are the building units of Cu-ZJM-1 zeolites.…”

A reconstruction strategy for the synthesis of Cu-SAPO-34 with excellent NH3-SCR catalytic performance and hydrothermal stability

“…The peaks at 10 ppm are ascribed to the -CH3 groups of DEA, and the peaks at around 41 ppm are obviously widened, probably arising from the combination of two signals from the -CH2groups of DEA and those from the -CH2groups linked to the primary amine groups of TEPA. The peaks at 48 ppm are assigned to -CH2-groups connected to the secondary amine groups of TEPA [23,24]. The results imply that both DEA and Cu-TEPA are still present in the samples.…”