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- W2796217969 abstract "Ceramic foams are a promising alternative to conventional catalyst supports due to their macro-porosity, which should enhance mass transport properties during reactions. Whilst direct foaming is a straightforward production method, the use of kitchen mixers commonly reported in the literature to initially froth the ceramic slurry limits understanding of scale-up. This study reports a systematic experimental investigation of the impact of mixing parameters on the properties of the foams produced in an agitated baffled vessel of diameter, T = 175 mm, equipped with an up-pumping pitch blade turbine with diameter of either D = 0.23 T or 0.51 T and a bottom round sparger with a diameter of 45 mm. The flow conditions in the present study were in the low to mid transitional regime (50 < Re < 1000). Design of Experiments (DoE) was employed to generate a series of screening experiments by variation of sparging time, air flow rate, impeller speed and impeller diameter. The mixing behaviour was described as a function of relevant dimensionless groups (Re, Fr, Flg, etc.) whilst the gas–liquid flow regime was estimated by examination of a ceramic particles free system. The properties of the foams obtained were correlated with key dimensionless numbers, though the exponents obtained deviated from values in the published literature. In addition, the rheology of the foam was correlated to the bubble size distribution showing that rheology measurements have potential for at-line measurement to control the structure of the produced material." @default.
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- W2796217969 date "2018-06-01" @default.
- W2796217969 modified "2023-09-27" @default.
- W2796217969 title "Effect of mixing conditions on the wet preparation of ceramic foams" @default.
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- W2796217969 doi "https://doi.org/10.1016/j.cherd.2018.03.044" @default.
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