SAPO-11分子筛的形态与多孔结构以及硅铝磷酸盐凝胶的化学和相组成之间的关系

Relation between Morphology and Porous Structure of SAPO-11 Molecular Sieves and Chemical and Phase Composition of Silicoaluminophosphate Gels.

作者信息

Agliullin Marat R, Yakovenko Roman E, Kolyagin Yury G, Serebrennikov Dmitry V, Vildanov Farkhad S, Prosochkina Tatyana R, Kutepov Boris I

机构信息

Institute of Petrochemistry and Catalysis, Ufa Federal Research Centre of the Russian Academy of Sciences (UFRC RAS), 450075 Ufa, Russia.

Faculty of Chemical Engineering, Ufa State Petroleum Technological University, 450062 Ufa, Russia.

出版信息

Gels. 2022 Feb 24;8(3):142. doi: 10.3390/gels8030142.

DOI:10.3390/gels8030142

PMID:35323255

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8955599/

Abstract

The formation of silicoaluminophosphate gels using boehmite, Al isopropoxide, and di-n-propylamine as a template of silicoaluminophosphate gels as well as their subsequent crystallization into SAPO-11 molecular sieves was studied in detail using X-ray fluorescence spectroscopy (XRF), powder X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), and N adsorption-desorption methods. The effect of the chemical and phase composition of silicoaluminophosphate gels on the physicochemical properties of SAPO-11 molecular sieves was shown. The secondary structural units that the AEL lattice is composed of were found to be formed at the initial stage of preparation involving aluminum isopropoxide. Several approaches to control their morphology and secondary porous structure are also proposed.

摘要

使用勃姆石、异丙醇铝和二正丙胺作为硅铝磷酸盐凝胶的模板来制备硅铝磷酸盐凝胶，以及随后将其结晶为SAPO-11分子筛，利用X射线荧光光谱法（XRF）、粉末X射线衍射（XRD）、拉曼光谱、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和N吸附-脱附方法进行了详细研究。研究表明了硅铝磷酸盐凝胶的化学和相组成对SAPO-11分子筛物理化学性质的影响。发现AEL晶格所由组成的二级结构单元是在涉及异丙醇铝的制备初始阶段形成的。还提出了几种控制其形态和二级多孔结构的方法。