Study on the activity of Ni-Co/ZSM-5 catalyst for dehydroaromatization of methane at low temperature

DOI

10.2991/icmmct-17.2017.181How to use a DOI?

Keywords

methane; dehydro-aromatization; activation; Ni-Co/HZSM-5 catalyst

Abstract

The Ni-Co/HZSM-5 methane dehydroaromatization (DHA) catalyst was prepared using wet impregnation. The catalysts were characterized by XRD, TEM, TG-DSC, FT-IR and XPS techniques before and after reaction. The results show that the maximum conversion rate of methane DHA at 580 reached 39.8%. The carbon-silicon-oxygen compound after reaction is the main component of coke on surface of the catalyst. The carbon content of the spent catalyst was 490% higher than that of the fresh sample, indicating a vigorous reaction formed, and there's the possibility of co-catalysis of cobalt and nickel metal in the methane DHA reaction. XPS analysis showed that the catalyst surface coking and deactivation were due to the polymerization of ethylene. The formation of ethylene is believed to be the result of the dehydrogenation of CH4 in the synergistic action of lattice oxygen and cobalt-nickel in the molecular sieve. The decrease of oxygen content on the surface of the catalyst indirectly proves that the oxygen in the catalyst is involved in the methane dehydrogenation reaction.

Copyright

© 2017, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Yi-Heng Lu
AU  - Tao Yang
AU  - Yu-wei Lu
PY  - 2017/04
DA  - 2017/04
TI  - Study on the activity of Ni-Co/ZSM-5 catalyst for dehydroaromatization of methane at low temperature
BT  - Proceedings of the 2017 5th International Conference on Machinery, Materials and Computing Technology (ICMMCT 2017)
PB  - Atlantis Press
SP  - 902
EP  - 907
SN  - 2352-5401
UR  - https://doi.org/10.2991/icmmct-17.2017.181
DO  - 10.2991/icmmct-17.2017.181
ID  - Lu2017/04
ER  -