The choice of materials for containment systems is critical. Materials must be resistant to the chemicals and conditions of the catalytic process. For example: - Stainless Steel: Commonly used for high-pressure and high-temperature reactions due to its strength and corrosion resistance. - Glass: Preferred for reactions requiring visual monitoring or those involving non-corrosive substances. - Teflon: Utilized for its chemical inertness, especially in reactions involving strong acids or bases.