Silicoaluminophosphate (SAPO)-Templated Activated Carbons.

Area of Science:

• Materials Science
• Nanotechnology
• Chemical Engineering

Background:

• Microporous carbons are crucial for adsorption and catalysis.
• Zeolite-templated carbons (ZTCs) offer ordered pore structures.
• Developing efficient synthesis routes for ZTCs is an ongoing challenge.

Purpose of the Study:

• To synthesize microporous activated carbon using SAPO-37 as a hard template.
• To characterize the resulting carbon's properties, including surface area and pore volume.
• To evaluate the feasibility of using a milder template removal process compared to traditional methods.

Main Methods:

• Propylene was deposited and pyrolyzed within the SAPO-37 framework.
• The SAPO-37 template was removed using hydrochloric acid (HCl) and sodium hydroxide (NaOH).
• The synthesized carbon was characterized for its yield, crystallinity, morphology, and adsorption properties.

Main Results:

• A microporous activated carbon with high surface area and significant micropore/ultramicropore volumes was successfully prepared.
• The synthesized carbon exhibited comparable properties to zeolite-Y-templated carbons.
• Template removal was achieved without the need for hydrofluoric acid (HF).

Conclusions:

• SAPO-37 is an effective template for synthesizing high-performance microporous activated carbon.
• The developed synthesis route offers a potentially safer and more industrially viable alternative to HF-based methods.
• The resulting carbon's properties suggest suitability for various adsorption and separation applications.