Gas-liquid mass transfer in gas-liquid-liquid dispersions
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2016, International Journal of Greenhouse Gas ControlCitation Excerpt :The special performance of sound wave in degassing has caused widely concern in researchers. Wilhelms research group from France (Laugier et al., 2008; Lekhal et al., 1997; Monnier et al., 1999; Pandit et al., 2004; Ratoarinoro et al., 1992; Sochard et al., 1998) studied the gas solubility and gas-liquid mass transfer in different type of ultrasonic reactor, and the results showed that the effect of ultrasonic on reduction of apparent solubility was not significant (less than 12%),while gas-liquid mass transfer was promoted through micro-mixing effect of ultrasonic. According to results, the degassing efficiency could be increased by more than 2 times, and gas removal and gas-liquid mass transfer at low frequencies were better than those at the high frequencies.
Innovative method to prepare a stable emulsion liquid membrane for high CO<inf>2</inf> absorption and its performance evaluation for a natural gas feed in a rotating disk contactor
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2016, Chemical Engineering Research and DesignCitation Excerpt :These results show that the speed of RDC also influences absorption of CO2. Earlier studies also suggest that increasing the speed of rotating packed bed and stirred autoclave reactor improves the efficiency of CO2 separation (Albal et al., 1983; Chaudhari et al., 1987; Karandikar et al., 1986; Ledakowicz et al., 1984; Lekhal et al., 1997; Lin and Chen, 2007; Lin et al., 2008). High speed of RDC developed rapid contact between dispersed aqueous droplets and the feed gas.
Experimental study on gas-liquid-liquid macro-mixing in a stirred tank
2012, Chemical Engineering ScienceCitation Excerpt :Typical applications include hydroformylation, hydrogenation, microorganism fermentation, liquid–liquid extraction, etc. Previous investigations concerning the gas–liquid–liquid dispersions in stirred tanks were mainly focused on the minimum agitation speed for complete liquid–liquid dispersion (Armenante and Abu-Hekmeh, 1994; Kamil et al., 2001), the effect of a dispersed second inert liquid phase on gas–liquid interfacial area (Das et al., 1985; Mehta and Sharma, 1971), gas absorption rate (Bruining et al., 1986; Cents et al., 2001; Dumont and Delmas, 2003; Lekhal et al., 1997; Linek and Benes, 1976; Van der Meer et al., 1992; Van Ede et al., 1995) and homogeneous biphasic catalytic aspects (Purwanto and Delmas, 1995). The knowledge of macro-mixing time is essential when the rate of mixing is comparable with or slower than that of chemical reaction or mass transfer (Raghav Rao and Joshi, 1988).
Mass transfer enhancement of gas absorption by adding the dispersed organic phases
2011, Chinese Journal of Chemical Engineering