In:
Journal of Nanoscience and Nanotechnology, American Scientific Publishers, Vol. 20, No. 11 ( 2020-11-01), p. 7018-7026
Abstract:
Diesel fuel can produce higher concentrations of H 2 and CO gases than other types of hydrocarbon fuels via a reforming reaction for solid oxide fuel cells (SOFCs). However, in addition to sulfur compounds and aromatic hydrocarbons in diesel fuel are a major cause of catalyst
deactivation. To elucidate the phenomenon of catalyst deactivation in the presence of an aromatic hydrocarbon, dodecane (C 12 H 26 ) and hexadecane (C 16 H 34 ) were blended with an aromatic hydrocarbon such as 1-methylnaphthalene (C 11 H 10 )
to obtain a diesel surrogate fuel. The experiments were performed for autothermal reforming of the diesel surrogate fuel under conditions of S/C = 1.17, O 2 /C = 0.24, 750°C and GHSV= 12,000 h −1 . Three Ni–Al-based catalysts with 10 wt% (N10A), 30 wt% (N30A)
and 50 wt% (N50A) of NiO were prepared via the polymer modified incipient method. Whereas all of the Ni–Al-based catalysts were deactivated with increasing reaction time, the catalysts with greater Ni contents tended to maintain their catalytic performance for a longer time. Correlation between the catalytic performances and Ni content were analyzed by temperature-programmed reduction (TPR), Fourier transform infrared (FT-IR) spectroscopy, scanning electron microscope with energy-dispersive X-ray spectroscopy (SEM-EDX), Brunauer-Emmett-Teller(BET) analysis, X-ray diffraction
(XRD) and X-ray photoelectron spectroscopy (XPS). Also, we concluded that ethylene (C 2 H 4 ), which was detected by gas chromatography-mass spectrometry (GC-MS), was the fundamental cause of deactivation of the Ni–Al-based catalysts by accelerating the deposition of
wire-type carbon on the catalytic surface.
Type of Medium:
Online Resource
ISSN:
1533-4880
DOI:
10.1166/jnn.2020.18848
Language:
English
Publisher:
American Scientific Publishers
Publication Date:
2020
SSG:
11
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