Journal
CHEMISTRYOPEN
Volume 7, Issue 10, Pages 789-796Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/open.201800162
Keywords
carbon nanotubes; chemical vapor deposition; CO2 hydrogenation; methane formation; supported catalysts
Categories
Funding
- Ministry of Human Capacities
- Ministry of the Hungarian Research Development and Innovation Office [NKFIH OTKA PD 115769, OTKA 128543, OTKA K120115]
- European Union
- Hungarian State
- European Regional Development Fund [GINOP-2.3.4-15-2016-00004]
- [GINOP-2.3.2-15-2016-00013]
Ask authors/readers for more resources
Nitrogen-doped, bamboo-like carbon nanotubes (BCNTs) were synthesized from butylamine by catalytic chemical vapor deposition (CCVD method). The nanotubes were oxidized by H2SO4/HNO3 treatment and used to prepare calcium alginate gelled BCNT spheres. These beads were first carbonized and then Pd, Rh and Ni nanoparticles were anchored on the surface of the spheres. These systems were then applied as catalysts in CO2 hydrogenation. The BCNT support was examined by Raman spectroscopy, dynamic light scattering (DLS) and X-ray photoelectron spectroscopy (XPS). The prepared catalysts were characterized by HRTEM and SEM. The oxidation pretreatment of BCNTs was successful, with the electrokinetic potential of the water-based dispersion of BCNTs measuring -59.9 mV, meaning the nanotube dispersion is stable. Pyridinic and graphitic types of incorporated nitrogen centers were identified in the structure of the nanotubes, according to the XPS measurements. The Pd-containing BCNT sphere catalyst was the most efficient in the catalytic studies. The highest conversion was reached on the Pd catalyst at 723 K, as well as at 873 K. The difference in the formation rate of CO was much less at 873 K between the Pd and Rh compared to the 723 K values. Accordingly, the application of Pd-containing BCNT/carbon-supported catalyst favored the generation of CO. However, the Ni-BCNT/carbon catalyst leads to the formation of CH4 as the major product.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available