Ethane Chlorination Toward Vinyl Chloride Synthesis: Mechanistic and Catalytic Perspectives

Area of Science:

• Chemical Engineering
• Catalysis
• Green Chemistry

Background:

• Conventional vinyl chloride monomer (VCM) production relies on ethylene or acetylene.
• Ethane chlorination presents a potentially more sustainable alternative using radical chemistry.

Purpose of the Study:

• To critically assess the mechanistic basis of ethane chlorination for VCM production.
• To review advances in rare-earth oxychloride catalysts and deactivation mechanisms.
• To highlight the potential of ethane chlorination as a low-carbon VCM route.

Main Methods:

• Review of mechanistic studies on radical-mediated and surface-catalyzed ethane chlorination.
• Analysis of rare-earth oxychloride catalyst performance and stabilization of intermediates.
• Investigation of catalyst deactivation pathways like phase transformation and hydroxylation.

Main Results:

• Ethane chlorination involves complex gas-phase radical chemistry and surface catalysis.
• Rare-earth oxychloride catalysts show potential for stabilizing key intermediates.
• Catalyst deactivation due to phase transformation and hydroxylation limits long-term stability.

Conclusions:

• Ethane chlorination is a feasible low-carbon VCM production pathway, especially with decarbonized energy.
• Further research in catalyst design, mechanistic understanding, and process integration is crucial for industrial viability.