Flow Characteristics in Cocurrent Upflow Bubble Column Dispersed with Micro-Bubbles

Autor:	Yoshiyuki Bando, Keiji Yasuda, Masataka Oshima, Yufei Wang, Yasuhiro Funato, Takashi Yoshimatsu, Wenji Luo, Masaaki Nakamura
Rok vydání:	2008
Předmět:	Mass transfer coefficient Bubble column Chromatography Materials science General Chemical Engineering Flow (psychology) General Chemistry Mechanics Wake Decomposition Physics::Fluid Dynamics Reaction rate constant Astrophysics::Galaxy Astrophysics Sparging Micro bubble
Zdroj:	JOURNAL OF CHEMICAL ENGINEERING OF JAPAN. 41:562-567
ISSN:	1881-1299 0021-9592
DOI:	10.1252/jcej.07we105
Popis:	The flow characteristics and decomposition performance in the cocurrent upflow bubble column dispersed with micro-bubbles were experimentally examined. A micro-bubble generator was installed at the bottom of the column, and for comparison the sintered glass gas sparger was set at the lower part of the column.When milli-bubbles coexist with dispersed micro-bubbles, micro-bubbles disappear. This is considered because micro-bubbles are absorbed into the wake of milli-bubbles. The volumetric mass transfer coefficient is higher for micro-bubbles than for milli-bubbles, but the mass transfer coefficient is much lower for the former than for the latter. The apparent decomposition rate constant strongly depends on the volumetric coefficient. When the volumetric coefficient is higher, the rate constant of micro-bubbles is higher than that of milli-bubbles.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::6b3fc11e111b3563d9be35d899c6c6c7 https://doi.org/10.1252/jcej.07we105 Zobrazit plný text záznamu