Tri-reforming of surrogate blogs over Ni/Mg/ceria-zirconia/alumina pellet catalysts [electronic resource]

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Ngôn ngữ: eng

Ký hiệu phân loại: 621.48 Nuclear engineering

Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Science ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2018

Mô tả vật lý: Size: p. 1129-1142 : , digital, PDF file.

Bộ sưu tập: Metadata

ID: 262990

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The performance of catalytic tri-reforming under industrially relevant situations (e.g., pellet catalysts, pressurized reactor) was investigated using surrogate biogas as the feedstock. Tri-reforming using Ni/Mg/Ce
0.6
Zr
0.4
O
2
/Al
2
O
3
pellet catalysts was studied in a bench scale fixed-bed reactor. The feed molar ratio for CH
4
: CO
2
: air was fixed as 1.0: 0.70: 0.95. The effects of temperature (800 ? 860 �C), pressure (1 ? 6 bar), and H
2
O/CH
4
molar feed ratio (0.23 ? 0.65) were examined. Pressure has substantial impact on the reaction and transport rates and equilibrium conversions, making it a key variable. At 860 �C, CO
2
conversion increased from 4 to 61% and H
2
/CO molar ratio decreased from 2.0 to 1.1 as the pressure changed from 1 to 6 bar. CO
2
conversion and H
2
/CO molar ratio were also influenced by the temperature and H
2
O/CH
4
molar ratio. At 3 bar, CO
2
conversion varied between 4 and 43% and the H
2
/CO molar ratio varied between 1.2 and 1.9 as the temperature changed from 800 to 860 �C. At 3 bar and 860 �C, CO
2
conversion decreased from 35 to 8% and H
2
/CO molar ratio increased from 1.7 to 2.4 when the H
2
O/CH
4
molar ratio was increased from 0.23 to 0.65. This work demonstrates that the tri-reforming technology is feasible for converting biogas under scaled-up conditions in a fixed-bed reactor.

1. 09 biomass fuels
2. Biogas
3. Biomass
4. Catalyst
5. Fts

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