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- W2737523018 abstract "Abstract Ni-based catalysts supported on various alumina supports with different crystalline phases (γ-, α-, θ- and δ-Al2O3) were prepared and the effects of crystalline phases on the catalytic performance towards acetic acid steam reforming (AASR) were investigated. An acetic acid conversion of nearly 100% was observed in all the four catalysts, and their hydrogen selectivities were in the following order: Ni/α-Al2O3 (90%) > Ni/γ-Al2O3 (79%) > Ni/δ-Al2O3 (53%) > Ni/θ-Al2O3 (25%). Using different characterization methods, the inner relationship between catalyst crystalline phase and catalytic properties was determined. Through TEM, H2-TPR and XPS characterization, Compared with α-Al2O3, on the surface of other crystalline phases of Al2O3 support were formed NiAl2O4 which indicated stronger interaction intensity between these supports and Ni., and that would reduce the formation of metallic Ni. It was confirmed that metallic Ni played a core role of catalytic AASR. More metallic Ni content caused better C C bonds and C H bonds breaking capability and eventually enhanced the selectivity towards hydrogen. That would be the key reason for Ni/α-Al2O3 showed best hydrogen selectivity among these four catalysts." @default.
- W2737523018 created "2017-07-31" @default.
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- W2737523018 date "2017-08-01" @default.
- W2737523018 modified "2023-09-29" @default.
- W2737523018 title "Steam reforming of acetic acid using Ni/Al 2 O 3 catalyst: Influence of crystalline phase of Al 2 O 3 support" @default.
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- W2737523018 doi "https://doi.org/10.1016/j.ijhydene.2017.07.027" @default.
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