Steam reforming of simulated biogas over plate Ni-Cr catalysts: Influence of pre-oxidation on catalytic activity

Quynh Thi Phuong Bui; Yongmin Kim; Sung Pil Yoon; Jonghee Han; Hyung Chul Ham; Suk Woo Nam; Chang Won Yoon

doi:10.1016/j.apcatb.2014.11.045

Steam reforming of simulated biogas over plate Ni-Cr catalysts: Influence of pre-oxidation on catalytic activity

Quynh Thi Phuong Bui, Yongmin Kim, Sung Pil Yoon, Jonghee Han, Hyung Chul Ham, Suk Woo Nam, Chang Won Yoon

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

The activity and stability of NiCr plate catalysts were significantly enhanced by a pretreatment process involving pre-oxidation at ≥600°C with subsequent reduction at 700°C. Analytical techniques including SEM, TEM, and XPS-depth profiling studies revealed that the pretreatment induced surface reconstruction in the bulk NiCr material generating new Ni sites with improved activity. The catalytic activity was highly dependent upon the oxidation temperature. In addition to the creation of novel Ni sites, chromium oxide acted as a structural promoter to suppress sintering of the Ni active sites. Activation of the NiCr plate catalyst via pretreatment at 700°C resulted in improved stability for biogas reforming reactions over a period of 100h. Moreover, the stability of the reforming catalyst was sustained over 100h with a steam/CH₄ ratio of ≥1.5. The influences of temperature, inlet H₂O/CH₄ ratio, and CH₄/CO₂ ratios on the steam reforming of biogas were further studied.

Original language	English
Pages (from-to)	335-344
Number of pages	10
Journal	Applied Catalysis B: Environmental
Volume	166-167
DOIs	https://doi.org/10.1016/j.apcatb.2014.11.045
Publication status	Published - 2015 May 1

Keywords

Biogas
NiCr
Plate catalyst
Pretreatment
Steam reforming

ASJC Scopus subject areas

Catalysis
Environmental Science(all)
Process Chemistry and Technology

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10.1016/j.apcatb.2014.11.045

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Steam reforming of simulated biogas over plate Ni-Cr catalysts : Influence of pre-oxidation on catalytic activity. / Bui, Quynh Thi Phuong; Kim, Yongmin; Yoon, Sung Pil; Han, Jonghee; Ham, Hyung Chul; Nam, Suk Woo; Yoon, Chang Won.

In: Applied Catalysis B: Environmental, Vol. 166-167, 01.05.2015, p. 335-344.

Research output: Contribution to journal › Article › peer-review

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abstract = "The activity and stability of NiCr plate catalysts were significantly enhanced by a pretreatment process involving pre-oxidation at ≥600°C with subsequent reduction at 700°C. Analytical techniques including SEM, TEM, and XPS-depth profiling studies revealed that the pretreatment induced surface reconstruction in the bulk NiCr material generating new Ni sites with improved activity. The catalytic activity was highly dependent upon the oxidation temperature. In addition to the creation of novel Ni sites, chromium oxide acted as a structural promoter to suppress sintering of the Ni active sites. Activation of the NiCr plate catalyst via pretreatment at 700°C resulted in improved stability for biogas reforming reactions over a period of 100h. Moreover, the stability of the reforming catalyst was sustained over 100h with a steam/CH4 ratio of ≥1.5. The influences of temperature, inlet H2O/CH4 ratio, and CH4/CO2 ratios on the steam reforming of biogas were further studied.",

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AU - Nam, Suk Woo

AU - Yoon, Chang Won

N1 - Funding Information: This research was supported by the Global Research Laboratory Program through the National Research Foundation of Korea funded by the Ministry of Science, ICT and Future Planning of Republic of Korea . Part of this research was also supported by the Fundamental Technology Development Programs for the Future through the Korea Institute of Science and Technology as well as by the National Research Foundation of Korea Grant funded by the Korean Government (MSIP) (University-Institute cooperation program . Publisher Copyright: © 2014 Elsevier B.V.

PY - 2015/5/1

Y1 - 2015/5/1

N2 - The activity and stability of NiCr plate catalysts were significantly enhanced by a pretreatment process involving pre-oxidation at ≥600°C with subsequent reduction at 700°C. Analytical techniques including SEM, TEM, and XPS-depth profiling studies revealed that the pretreatment induced surface reconstruction in the bulk NiCr material generating new Ni sites with improved activity. The catalytic activity was highly dependent upon the oxidation temperature. In addition to the creation of novel Ni sites, chromium oxide acted as a structural promoter to suppress sintering of the Ni active sites. Activation of the NiCr plate catalyst via pretreatment at 700°C resulted in improved stability for biogas reforming reactions over a period of 100h. Moreover, the stability of the reforming catalyst was sustained over 100h with a steam/CH4 ratio of ≥1.5. The influences of temperature, inlet H2O/CH4 ratio, and CH4/CO2 ratios on the steam reforming of biogas were further studied.

AB - The activity and stability of NiCr plate catalysts were significantly enhanced by a pretreatment process involving pre-oxidation at ≥600°C with subsequent reduction at 700°C. Analytical techniques including SEM, TEM, and XPS-depth profiling studies revealed that the pretreatment induced surface reconstruction in the bulk NiCr material generating new Ni sites with improved activity. The catalytic activity was highly dependent upon the oxidation temperature. In addition to the creation of novel Ni sites, chromium oxide acted as a structural promoter to suppress sintering of the Ni active sites. Activation of the NiCr plate catalyst via pretreatment at 700°C resulted in improved stability for biogas reforming reactions over a period of 100h. Moreover, the stability of the reforming catalyst was sustained over 100h with a steam/CH4 ratio of ≥1.5. The influences of temperature, inlet H2O/CH4 ratio, and CH4/CO2 ratios on the steam reforming of biogas were further studied.

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Steam reforming of simulated biogas over plate Ni-Cr catalysts: Influence of pre-oxidation on catalytic activity

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