Synthesis of β zeolite using Tetraethyl ammonium bromide as a template agent

β zeolite is an embedded porous material with strong acidity and thermal stability, which is widely used in fields such as catalysis, adsorption, and separation. In the molecular structure of Tetraethylammonium bromide, ammonium ions are connected to four ethoxyl groups, while bromide ions attach to ammonium ions. Due to the presence of four ethoxy groups in TEABr molecules, a large number of hydrogen bonds and van der Waals forces can be formed, resulting in β zeolite acts as a template during the formation process.

• The role of TEABr in the synthesis of β zeolite

1. As a stimulant to promote crystal formation

TEABr, due to its large amount of ethoxyl groups in its molecules, therefore, a stable film can be formed on the surface of β zeolite seeds, which promotes the formation of crystals.

2. Increase β zeolite pore channels

TEABr molecules and β formation of hydrogen bonds and van der Waals forces between the silicon aluminum framework on the surface of zeolite seeds can increase the number and size of pores during crystal formation.

3. Promoting the crystal growth of β zeolite

A mixture of TEABr and solvents such as methyl isobutyl ketone (MIBK) can be deposited at high temperatures β on the surface of zeolite seeds, it promotes crystal growth.

• The practical application of TEABr synthesis of β zeolite

The application of TEABr in the vapor phase synthesis of β zeolite has been widely applied in practice. For example, using TEABr as a template can synthesize H-BEA and H-BETA catalysts with high selectivity and reactivity. In addition, TEABr can also combine with alkaline metal ions to hybridize and form coordinated covalent organic framework materials (COFs). This type of COFs can be applied in fields such as catalysis, adsorption, and environmental governance due to its high acidity and thermal stability.

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