TY - JOUR
T1 - Hydrodynamics and mechanism of hydrophobic foam column tray
T2 - Contact angle hysteresis effect
AU - Yan, Peng
AU - Li, Xingang
AU - Li, Hong
AU - Shao, Yuanyuan
AU - Zhang, Hui
AU - Gao, Xin
PY - 2020
Y1 - 2020
N2 - Interfacial wettability adjustment is a new method for intensifying vapor–liquid mass transfer process. Contact angle effect has been well investigated but not complete due to interfacial wettability consisting of both static behavior (contact angle) and dynamic behavior (contact angle hysteresis). Here, methods of adjusting contact angle hysteresis (CAH) were proposed, and then, the CAH effect on the hydrodynamics was investigated. A multiscale analysis of CAH effect, from interfacial force and wettability to single-bubble and gas–liquid two-phase flow inside the foam to bubble swarm hydrodynamics, was conducted, and thus, the hydrodynamic performance criteria were derived. The interfaces had similar contact angles, whereas a significant difference in the CAH was prepared by using the developed sol dip-coating and spray coating methods. Subsequent experiments revealed that lower CAH can decrease the pressure drop, homogenize the gas distribution, and increase the weeping rate, which are consistent with the derived criteria.
AB - Interfacial wettability adjustment is a new method for intensifying vapor–liquid mass transfer process. Contact angle effect has been well investigated but not complete due to interfacial wettability consisting of both static behavior (contact angle) and dynamic behavior (contact angle hysteresis). Here, methods of adjusting contact angle hysteresis (CAH) were proposed, and then, the CAH effect on the hydrodynamics was investigated. A multiscale analysis of CAH effect, from interfacial force and wettability to single-bubble and gas–liquid two-phase flow inside the foam to bubble swarm hydrodynamics, was conducted, and thus, the hydrodynamic performance criteria were derived. The interfaces had similar contact angles, whereas a significant difference in the CAH was prepared by using the developed sol dip-coating and spray coating methods. Subsequent experiments revealed that lower CAH can decrease the pressure drop, homogenize the gas distribution, and increase the weeping rate, which are consistent with the derived criteria.
KW - contact angle hysteresis
KW - distillation
KW - foam
KW - gas–liquid contacting
KW - process intensification
UR - http://www.scopus.com/inward/record.url?scp=85074478530&partnerID=8YFLogxK
U2 - 10.1002/aic.16793
DO - 10.1002/aic.16793
M3 - Article
AN - SCOPUS:85074478530
SN - 0001-1541
VL - 66
JO - AIChE Journal
JF - AIChE Journal
IS - 1
M1 - e16793
ER -