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 | |
| Publication status | Published - 2015 May 1 |
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ASJC Scopus subject areas
- Catalysis
- Process Chemistry and Technology
- Environmental Science(all)
Cite this
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, SukWoo; Yoon, Chang Won.
In: Applied Catalysis B: Environmental, Vol. 166-167, 01.05.2015, p. 335-344.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Steam reforming of simulated biogas over plate Ni-Cr catalysts
T2 - Influence of pre-oxidation on catalytic activity
AU - Bui, Quynh Thi Phuong
AU - Kim, Yongmin
AU - Yoon, Sung Pil
AU - Han, Jonghee
AU - Ham, Hyung Chul
AU - Nam, SukWoo
AU - Yoon, Chang Won
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.
KW - Biogas
KW - NiCr
KW - Plate catalyst
KW - Pretreatment
KW - Steam reforming
UR - http://www.scopus.com/inward/record.url?scp=84916917720&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84916917720&partnerID=8YFLogxK
U2 - 10.1016/j.apcatb.2014.11.045
DO - 10.1016/j.apcatb.2014.11.045
M3 - Article
AN - SCOPUS:84916917720
VL - 166-167
SP - 335
EP - 344
JO - Applied Catalysis B: Environmental
JF - Applied Catalysis B: Environmental
SN - 0926-3373
ER -