Journal of Catalysts / 2014 / Article / Tab 2

Review Article

Organocatalysis: Key Trends in Green Synthetic Chemistry, Challenges, Scope towards Heterogenization, and Importance from Research and Industrial Point of View

Table 2

Differences between homogeneous catalysts and heterogeneous catalysts.

Homogeneous catalystsHeterogeneous catalysts

Same phase as reaction mediumSolid phase
Difficult separationEasily separable
No recyclabilityRecyclability and regeneration
Often high rates of reactionLow rates of reaction
No diffusion controlDiffusion control
Robust to poisoningPoisoning, deactivation
High selectivityLow selectivity
Short lifeLong catalytic life
Mild conditionsEnergy-consuming process
Well understood mechanismPoor mechanistic understanding