Synthesis of the Zeolites from SBU: An SSZ-13 Study,Chemistry of Materials

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Synthesis of the Zeolites from SBU: An SSZ-13 Study
Chemistry of Materials ( IF 7.2 ) Pub Date : 2021-02-24 , DOI: 10.1021/acs.chemmater.0c04710
Kinga Mlekodaj ₁ , Milan Bernauer ₁ , Joanna E. Olszowka ₁ , Petr Klein ₁ , Veronika Pashkova ₁ , Jiri Dedecek ₁

Affiliation

Zeolite SSZ-13 was successfully synthesized via interzeolite conversion of zeolites X, A, and ZSM-5. Si(4Al) and Si(1Si, 3Al) were monitored by ²⁹Si MAS NMR spectroscopy and together with the ion exchange capacity to Co(II) ions were employed to monitor secondary building units (SBU) and (SiAl)_n sequences transferred from parent X and A zeolites to the structure of SSZ-13. The starting material serves as an Al and partial Si source and has to be disintegrated into linear or branched (SiAl)_n sequences. Also, no mutual structural building units, e.g., hexagonal prisms or 6 rings, are required for the formation of SSZ-13 zeolite. Among transferred (SiAl)_n sequences, a significant fraction (ca. 45%) is relocated in the form of chains with at least five T atoms containing three Al atoms (Al_TRI), decreasing the ion exchange capacity as only two of the three Al atoms are involved in balancing one Co(II).

中文翻译：

SBU合成沸石的SSZ-13研究

通过沸石X，A和ZSM-5的沸石间转化成功合成了SSZ-13沸石。Si（4Al）和Si（1Si，3Al）通过²⁹ Si MAS NMR光谱仪进行监测，并与Co（II）离子的离子交换能力一起用于监测从S转移的二级构建单元（SBU）和（SiAl）_n序列X和A沸石的母体为SSZ-13的结构。起始材料用作Al和部分Si源，必须分解为线性或支化（SiAl）_n序列。同样，SSZ-13沸石的形成不需要相互的结构构建单元，例如六棱柱或6个环。间转印（硅铝）_ñ序列中，很大一部分（约45％）以至少五个包含三个Al原子（Al _TRI）的T原子的链形式重新定位，由于三个Al原子中只有两个参与平衡，因此降低了离子交换能力一Co（II）。

更新日期：2021-03-09

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