Effect of Thermal Treatment on Hydrogen Uptake and Characteristics of Ni-, Co-, and Mo-Containing Catalysts
Artikel i vetenskaplig tidskrift, 2015

Nonsulfided alumina supported Ni, Co, Mo, NiMo, and CoMo hydrotreating catalysts were synthesize. The TEM results indicated low dispersions of the active metals for Mo, NiMo, and CoMo, samples but significantly higher dispersion for the Ni sample. The effect of calcination and reduction on the hydrogen uptake capacity of the samples was investigated. The H-2-chemisorption and XPS results together showed that the precalcination step had a detrimental effect on the hydrogen absorption of the Ni sample formation of stable metal oxides. The XPS results revealed that the metal oxides of all calcined samples reached with the alumina support to form very stable spinels. Futher, the positive effects of a hydrogen atmosphere during the reduction, on the hyderogen uptake of the samples were cinfirmed by H-2-chemisorption measurements. Finally, the heats of adsorption (Delta H) of hydrogen for the Ni and Co samples were calculated to be 140 and 98 kJ mol(-1), respectively.

Författare

Houman Ojagh

Chalmers, Kemi och kemiteknik

Kompetenscentrum katalys

Derek Creaser

Chalmers, Kemi och kemiteknik

Kompetenscentrum katalys

Stefanie Tamm

Kompetenscentrum katalys

Chalmers, Kemi och kemiteknik

Hu Chaoquan

Kompetenscentrum katalys

Chalmers, Kemi och kemiteknik

Louise Olsson

Chalmers, Kemi och kemiteknik

Kompetenscentrum katalys

Industrial & Engineering Chemistry Research

0888-5885 (ISSN) 1520-5045 (eISSN)

Vol. 54 46 11511-11524

Styrkeområden

Energi

Ämneskategorier

Materialkemi

DOI

10.1021/acs.iecr.5b02510

Mer information

Senast uppdaterat

2019-07-23