Effect of microwave drying, calcination and aging of Pt/Al2O3 on platinum dispersion
Journal article, 2018

The effect of heating method employed for drying and calcination during the synthesis of 1 wt% Pt/Al2O3catalyst was investigated. Conventional heating (CH) in resistive oven and microwave heating (MW) in single mode were applied, and the Pt dispersion and Brunauer-Emmett-Teller (BET) surface area were measured to characterize the samples. It was evidenced that the fast and homogeneous heating offered by the microwave heating led to higher Pt dispersion. However, this benefit was only achieved when the subsequent calcination was performed in a conventional oven. The aging in microwave oven of conventionally prepared—as well as MW-prepared—catalysts demonstrated the great ability of microwave irradiation to accelerate platinum sintering. After 1 h at 800°C under microwave, catalysts showed a dispersion of 5%. Therefore, microwave treatment should be considered for accelerated catalyst aging but should be avoided as a calcination technique for the synthesis of highly dispersed Pt/Al2O3.

Platinum dispersion

Drying

Catalyst synthesis

DOC

Microwave

Pt/Al O 2 3

Aging

Author

Xavier Auvray

Competence Centre for Catalysis (KCK)

Norwegian University of Science and Technology (NTNU)

Chalmers, Chemistry and Chemical Engineering, Chemical Technology, Chemical Engineering Design

Anthony Thuault

Université de Valenciennes et du Hainaut-Cambrésis

Catalysts

2073-4344 (ISSN)

Vol. 8 9 348

Subject Categories

Energy Engineering

Ceramics

Composite Science and Engineering

DOI

10.3390/catal8090348

More information

Latest update

12/10/2018