Efficient Synthesis of Hydrothermally Stable Mesoporous Aluminosilicates Using Trace Amounts of an Anionic Surfactant as a Co-Template

Abstract

Mesoporous aluminosilicates (MAs) with excellent hydrothermal stability have been a growing interest because of their potential application in face-centered cubic. The process of improving the P123 utilization efficiency and reducing the water consumption is an important issue for the synthesis and application of MAs. In this study, trace amounts of alcohol ether sulphate (AES) being the co-template were introduced into high P123 concentration to synthesize MAs. The water consumption is reduced 77.3%, and P123 utilization efficiency is increased 1.2 times in comparison to that of the conventional method. In high P123 concentration solution, micelle aggregates were formed without AES, resulting in the formation of less ordered MAs. However, well-dispersed micelles were formed in the presence of AES, which is beneficial for the subsequent assembling process. In addition, the micellar state corresponding to different AES contents and the influence on physicochemical properties of MAs were discussed.

Scalable Synthesis of Uniform Mesoporous Aluminosilicate Microspheres with Controllable Size and Morphology and High Hydrothermal Stability for Efficient Acid Catalysis

“…Mesoporous amorphous alumimosilicates carry moderately strong acid sites that are desirable for mass transportation because of their large mesopore sizes. Thus, they are promising for weak and moderate acid catalysis with bulky or large molecules involved. ,,, However, their hydrothermal stability is inferior to that of zeolites. ,− In addition, particle size and morphology control in the micrometer-scale level for mesoporous alumimosilicates are still insufficient. Therefore, the development of mesoporous aluminosilicates with controlled particle size and morphology, high hydrothermal stability, and strong acidity is highly desirable.…”

Hydrophobic Polypropylene Glycol Integration into the Micelles: A General Approach for High Utilization Efficiency of Organic Template

“…For example, P123 demand for per g MAs is decreased from 1.92 g (M 0 ) to 0.85 g (P 0.4 ). For comparison, our previous investigation concerning decreasing assumption amount of P123 by using mixed P123/AES micelles has reported the assumption of P123 per g MAs is 0.89 g . Generally, organic structure agent P123 constitutes about 70% the synthesis cost of MAs.…”

“…The surfactants were removed through calcined at 550 °C for 10 h. The obtained samples are denoted P x ( x = 0, 0.2, 0.4, 0.6, and 0.8). In comparison, conventional MAs were synthesized according to the literature and denoted as M-0 …”

“…In comparison, conventional MAs were synthesized according to the literature and denoted as M-0. 34 Hydrothermal Stability Test. To examine the hydrothermal stability of the synthesized materials, P 0.4 was hydrothermally treated at 800 °C, 100% water steam for 10 h, and the obtained sample was denoted HP 0.4 .…”

Obtaining of Mesoporous Aluminosilicates with High Hydrothermal Stability by Composite Organic Templates: Utility and Mechanism

“…A series of mesoporous aluminosilicates (MAs) with good hydrothermal stability have been prepared by self-assembly of basic characteristic structure units of microporous zeolite Y by our group. − Much attention has been focused on these materials obtained by this novel strategy because of their distinct textural structures and their potential application in heavy oil catalytic cracking . As we know, active micelles are prerequisite for the assembly of aluminosilicate raw materials. , On the other hand, active micelles will exist only in low concentration of P123 solution, leading to the low utilization efficiency of both organic template and water .…”