Design and fabrication of an automated temperature programmed reaction system to evaluate 3-way catalysts Ce 1-x-y(La/Y) xPt yO 2-δ

Abstract

A completely automated temperature-programmed reaction (TPR) system for carrying out gas-solid catalytic reactions under atmospheric flow conditions is fabricated to study CO and hydrocarbon oxidation, and NO reduction. The system consists of an all-stainless steel UHV system, quadrupole mass spectrometer SX200 (VG Scientific), a tubular furnace and micro-reactor, a temperature controller, a versatile gas handling system, and a data acquisition and analysis system. The performance of the system has been tested under standard experimental conditions for CO oxidation over well-characterized Ce 1-x-yPt x(La/Y) yO 2-δ catalysts. Testing of 3-way catalysis with CO, NO and C 2H 2 to convert to CO 2, N 2 and H 2O is done with this catalyst which shows complete removal of pollutants below 325°C. Fixed oxide-ion defects in Pt substituted Ce 1-y(La/Y) yO 2-y/2 show higher catalytic activity than Pt ion-substituted CeO 2. © Indian Academy of Sciences.