Scale-down of Heterogeneous Catalytic Reduction Using a Bubble Column: Controlled Mass Transfer down to 3 cm3 Working Volume

Autor:	John H. Atherton, H. M. Williams, Ahmed Elmekawy, Alan Hall
Rok vydání:	2015
Předmět:	Mass transfer coefficient Effective mass (solid-state physics) Chemistry Bubble Mass transfer Organic Chemistry Analytical chemistry chemistry.chemical_element Selective catalytic reduction Physical and Theoretical Chemistry Helium Dilution Catalysis
Zdroj:	Organic Process Research & Development. 19:1159-1163
ISSN:	1520-586X 1083-6160
DOI:	10.1021/acs.oprd.5b00034
Popis:	Best practice for scale-down of gas–liquid reactions requires control of the volumetric mass transfer coefficient, kLa. It is demonstrated that the use of small bubble columns can provide well-controlled kLa and catalyst dispersion down to a scale of 3 cm3. This scale is several times less than has been previously demonstrated for heterogeneously catalysed reduction using gaseous hydrogen and is more easily reproduced than small scale stirred vessels. Measurements have been made at a fixed total gas flow, with the effective mass transfer rate being adjustable by dilution of the hydrogen flow with either helium or nitrogen.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::24e02e5ce618a3b0b735324896dbc1c6 https://doi.org/10.1021/acs.oprd.5b00034 Zobrazit plný text záznamu