Abstract
The kinetic characteristics of CO, HC and NOx reaction on different kinds of three way catalysts (TWC) has been investigated by using a fixed bed reactor. It was concluded that the three-way reaction on noble metal catalysts is controlled by internal diffusion at high space velocity 16×104 h−1. On non-noble metal catalysts internal diffusion control prevails at space velocities (S.V.) 4×104 h−1. On non-noble metal catalysts containing a small amount of a noble metal, the kinetic control region of the three-way reaction shifts to higher space velocity.
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