Diagnosing the cause of decreased conversion involves a systematic approach:
Characterize the Catalyst: Techniques like X-ray diffraction (XRD), scanning electron microscopy (SEM), and BET surface area analysis can reveal changes in catalyst structure or surface area. Evaluate Reaction Conditions: Assess if the temperature, pressure, and pH are within the optimal range for the reaction. Check for Poisoning or Fouling: Identify any potential poisons or fouling agents that might have contaminated the catalyst. Mass Transfer Analysis: Ensure that mass transfer limitations are not hindering the reaction by improving mixing or flow rates.
