Renewable Feedstocks: The Problem of Catalyst Deactivation and its Mitigation

Area of Science:

• Catalysis
• Biomass Conversion
• Chemical Engineering

Background:

• Extensive research focuses on bio-based feedstock conversion into fuels and chemicals.
• Catalyst activity and selectivity receive significant attention, while long-term stability is less explored.

Purpose of the Study:

• To review the primary challenges impacting long-term catalyst stability.
• To discuss the fundamental mechanisms behind these challenges.
• To present potential strategies for mitigating stability issues.

Main Methods:

• Literature review of catalyst stability challenges in biomass conversion.
• Analysis of catalyst fouling, poisoning, and destruction mechanisms.
• Discussion of mitigation options for enhanced catalyst longevity.

Main Results:

• Identified catalyst fouling due to feed or intermediate degradation.
• Detailed catalyst poisoning by contaminants affecting acid and hydrogenation sites.
• Highlighted catalyst destruction under hydrothermal conditions due to support and active site instability.

Conclusions:

• Addressing catalyst fouling, poisoning, and destruction is essential for sustainable bio-based feedstock conversion.
• Understanding fundamental mechanisms is key to developing effective mitigation strategies.
• Improved catalyst stability will enhance the economic viability of biofuels and biochemicals production.