Effect of microwave drying, calcination and aging of Pt/Al2O3 on platinum dispersion
Artikel i vetenskaplig tidskrift, 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.

Microwave

Pt/Al O 2 3

Catalyst synthesis

Platinum dispersion

DOC

Aging

Drying

Författare

Xavier Auvray

Kompetenscentrum katalys (KCK)

Chalmers, Kemi och kemiteknik, Kemiteknik, Kemisk apparatteknik

Norges teknisk-naturvitenskapelige universitet

Anthony Thuault

Université de Valenciennes et du Hainaut-Cambrésis

Catalysts

2073-4344 (ISSN)

Vol. 8 9 348

Ämneskategorier

Energiteknik

Keramteknik

Kompositmaterial och -teknik

DOI

10.3390/catal8090348

Mer information

Senast uppdaterat

2018-09-26