Publication detail

Catalytic and Heating Behavior of Nanoscaled Perovskites under Microwave Radiation

SCHOLZ, P. ONDRUSCHKA, B. CIHLÁŘ, J. EMMERICH, R. KRECH, T. MOSER, C.

Original Title

Type

journal article - other

Language

English

Original Abstract

Perovskite powders of the types La-Ca-Al-M-O , M = Fe, Cr, Mn, Co and La-Sr-Mn-Co-O were prepared via a sol-gel route according to the modified Pechini method. Incineration of the resins was performed before final sintering at 1273 K for 6 h. The phase composition of the samples was established by X-ray powder diffraction analysis, and the lattice parameters were calculated using Rietveld analysis. The shape and size of the particles were determined via scanning electron microscopy and the specific surface area of the powder perovskites was established by the BET method. The principal particles were ca. 100 nm in size and formed agglomerates larger than 1.0 lm. The composition of the perovskites was established by EDX analysis. Following this, the catalytic behavior was tested by means of total oxidation of propane. The catalytic performance was measured at atmospheric pressure with 3 g of catalyst in a fixed-bed quartz reactor (i.d. = 18 mm) under thermal-assisted and microwaveassisted conditions. Initial results show a strong dependence of the catalytic and heating behavior on the nature of the M-atom and its number of unpaired d-electrons as well as on the particle size and its specific surface area. No significant difference in the results could be detected from comparison of the two heating methods.

Keywords

Heterogeneous catalysis, Nanoparticles, Oxidation, Perovskites

Authors

SCHOLZ, P.; ONDRUSCHKA, B.; CIHLÁŘ, J.; EMMERICH, R.; KRECH, T.; MOSER, C.

RIV year

2008

Released

9. 7. 2008

Publisher

WILEY-VCH Verlag GmbH & Co. KGaA,

Location

Weinheim

ISBN

0930-7516

Periodical

CHEMICAL ENGINEERING & TECHNOLOGY

Year of study

Number

State

Federal Republic of Germany

Pages from

1000

Pages to

1006

Pages count

BibTex

@article{BUT49578,
  author="Peter {Scholz} and Bernd {Ondruschka} and Jaroslav {Cihlář} and Rudolf {Emmerich} and Thomas {Krech} and Christina {Moser}",
  title="Catalytic and Heating Behavior of Nanoscaled Perovskites under Microwave Radiation",
  journal="CHEMICAL ENGINEERING & TECHNOLOGY",
  year="2008",
  volume="31",
  number="7",
  pages="1000--1006",
  issn="0930-7516"
}