Effect of pre-treatment and calcination temperature on Al2O3-ZrO2 supported Ni-Co catalysts for dry reforming of methane

Ahmed Al-Fatesh, Jehad Abu-Dahrieh, Hanan Atia, Udo Armbruster, Ahmed A Ibrahim, Wasim Khan, Ahmed Abasaeed, Anis H Fakeeha

Research output: Contribution to journalArticle

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Abstract

In this paper, the effect of pre-treatment and calcination temperature on a series of 5%Co/Al2O3-ZrO2, 5%Ni/Al2O3-ZrO2 and 2.5%Co-2.5%Ni/Al2O3-ZrO2 catalysts for dry reforming of methane was investigated. Main focus of our research was to improve the catalyst stability by proper pre-treatment and reaction conditions. The first approach aimed at the catalyst pre-treatment by using bimetallic systems and the second strategy at the in situ suppression of coke. The catalytic activity of bimetallic system was indeed higher compared to the monometallic in the temperature range of 500–800 °C (space velocity 18000 ml h−1·gcat−1, CH4/CO2 = 1). The bimetallic catalyst calcined at 800 °C showed highest CH4 conversion without deactivation and gave a H2/CO ratio of 91% and 0.96, respectively, and good stability with less coke deposition over 28 h at 800 °C reaction temperature. This improvement is assigned to the synergism between Co and Ni, their high dispersion according to interaction with support. It has been shown in our work that pretreatment temperatures and atmospheres have strong impact on stability of the catalyst. TEM, XRD and TPO investigations confirmed that the slight catalyst deactivation was related to the formation of multiwall carbon nanotubes with hollow inner tube structure. The addition of small amounts of steam or oxygen during DRM improved both the catalyst activity and stability as the bimetallic catalyst lost around 9.4% conversion in DRM, 5.4% in presence of water and only 3.2% in presence of O2.
Original languageEnglish
Pages (from-to)21546-21558
Number of pages13
JournalInternational Journal of Hydrogen Energy
Volume44
Issue number39
DOIs
Publication statusPublished - 04 Jul 2019

Fingerprint

Reforming reactions
pretreatment
Calcination
roasting
Methane
methane
catalysts
Catalysts
Coke
Temperature
temperature
coke
Catalyst activity
deactivation
Catalyst deactivation
Carbon nanotubes
Steam
steam
Transmission electron microscopy
catalytic activity

Keywords

  • Bimetallic catalyst
  • Dry reforming
  • Methane
  • Stability
  • Deactivation
  • Regeneration

Cite this

Al-Fatesh, Ahmed ; Abu-Dahrieh, Jehad ; Atia, Hanan ; Armbruster, Udo ; Ibrahim, Ahmed A ; Khan, Wasim ; Abasaeed, Ahmed ; Fakeeha, Anis H . / Effect of pre-treatment and calcination temperature on Al2O3-ZrO2 supported Ni-Co catalysts for dry reforming of methane. In: International Journal of Hydrogen Energy. 2019 ; Vol. 44, No. 39. pp. 21546-21558.
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Effect of pre-treatment and calcination temperature on Al2O3-ZrO2 supported Ni-Co catalysts for dry reforming of methane. / Al-Fatesh, Ahmed ; Abu-Dahrieh, Jehad; Atia, Hanan; Armbruster, Udo; Ibrahim, Ahmed A; Khan, Wasim ; Abasaeed, Ahmed; Fakeeha, Anis H .

In: International Journal of Hydrogen Energy, Vol. 44, No. 39, 04.07.2019, p. 21546-21558.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Effect of pre-treatment and calcination temperature on Al2O3-ZrO2 supported Ni-Co catalysts for dry reforming of methane

AU - Al-Fatesh, Ahmed

AU - Abu-Dahrieh, Jehad

AU - Atia, Hanan

AU - Armbruster, Udo

AU - Ibrahim, Ahmed A

AU - Khan, Wasim

AU - Abasaeed, Ahmed

AU - Fakeeha, Anis H

PY - 2019/7/4

Y1 - 2019/7/4

N2 - In this paper, the effect of pre-treatment and calcination temperature on a series of 5%Co/Al2O3-ZrO2, 5%Ni/Al2O3-ZrO2 and 2.5%Co-2.5%Ni/Al2O3-ZrO2 catalysts for dry reforming of methane was investigated. Main focus of our research was to improve the catalyst stability by proper pre-treatment and reaction conditions. The first approach aimed at the catalyst pre-treatment by using bimetallic systems and the second strategy at the in situ suppression of coke. The catalytic activity of bimetallic system was indeed higher compared to the monometallic in the temperature range of 500–800 °C (space velocity 18000 ml h−1·gcat−1, CH4/CO2 = 1). The bimetallic catalyst calcined at 800 °C showed highest CH4 conversion without deactivation and gave a H2/CO ratio of 91% and 0.96, respectively, and good stability with less coke deposition over 28 h at 800 °C reaction temperature. This improvement is assigned to the synergism between Co and Ni, their high dispersion according to interaction with support. It has been shown in our work that pretreatment temperatures and atmospheres have strong impact on stability of the catalyst. TEM, XRD and TPO investigations confirmed that the slight catalyst deactivation was related to the formation of multiwall carbon nanotubes with hollow inner tube structure. The addition of small amounts of steam or oxygen during DRM improved both the catalyst activity and stability as the bimetallic catalyst lost around 9.4% conversion in DRM, 5.4% in presence of water and only 3.2% in presence of O2.

AB - In this paper, the effect of pre-treatment and calcination temperature on a series of 5%Co/Al2O3-ZrO2, 5%Ni/Al2O3-ZrO2 and 2.5%Co-2.5%Ni/Al2O3-ZrO2 catalysts for dry reforming of methane was investigated. Main focus of our research was to improve the catalyst stability by proper pre-treatment and reaction conditions. The first approach aimed at the catalyst pre-treatment by using bimetallic systems and the second strategy at the in situ suppression of coke. The catalytic activity of bimetallic system was indeed higher compared to the monometallic in the temperature range of 500–800 °C (space velocity 18000 ml h−1·gcat−1, CH4/CO2 = 1). The bimetallic catalyst calcined at 800 °C showed highest CH4 conversion without deactivation and gave a H2/CO ratio of 91% and 0.96, respectively, and good stability with less coke deposition over 28 h at 800 °C reaction temperature. This improvement is assigned to the synergism between Co and Ni, their high dispersion according to interaction with support. It has been shown in our work that pretreatment temperatures and atmospheres have strong impact on stability of the catalyst. TEM, XRD and TPO investigations confirmed that the slight catalyst deactivation was related to the formation of multiwall carbon nanotubes with hollow inner tube structure. The addition of small amounts of steam or oxygen during DRM improved both the catalyst activity and stability as the bimetallic catalyst lost around 9.4% conversion in DRM, 5.4% in presence of water and only 3.2% in presence of O2.

KW - Bimetallic catalyst

KW - Dry reforming

KW - Methane

KW - Stability

KW - Deactivation

KW - Regeneration

U2 - https://doi.org/10.1016/j.ijhydene.2019.06.085

DO - https://doi.org/10.1016/j.ijhydene.2019.06.085

M3 - Article

VL - 44

SP - 21546

EP - 21558

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

IS - 39

ER -