Experimental investigation of mass transfer of active ions in silica nanofluids

Effect of nanoparticles on oxygen absorption enhancement during sulfite forced oxidation

“…Thus, there is an optimum nanoparticle loading for enhancing the oxygen absorption rate. Similar trends were found by Keshishian et al [14]. Nanoparticle amount and mutual interference increase with the increase in the solid loading, which can enhance the mass transfer according to the shuttle effect and the boundary mixing effect.…”

“…The agglomeration effect is not included in the model, but the change in the particle size can be taken into account by Eq. (14). The nanoparticle agglomeration weakens the Brownian motion which reduces the effective diffusion coefficient and then the enhancement factor.…”

“…The research on micro particles has led to the use of nanoparticles to accelerate the mass transfer due to their excellent mass transfer effects [10][11][12][13]. Keshishian et al [14] studied the effect of silica nanoparticles on the mass transfer in both laminar and turbulent flow regimes and found an optimum nanoparticle volume fraction for enhancing mass transfer. Matin and Pop [15] studied the heat and mass transfer in a nanofluid flowing through a porous channel with a first order chemical reaction.…”

Mass transfer into/from nanofluid drops in a spray liquid‐liquid extraction column

“…18 In the field of mass transfer in nanofluids, there are a few researches dealt with mass diffusion in nanofluids 10,12,[19][20][21][22][23][24][25] and more researches investigated the influence of nanoparticles on convective mass transfer. 13,15,16,[26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44] Nevertheless, most researches on convective mass transfer in nanofluids are related to the gas absorption processes [26][27][28][29][30][31][32][33][34][35] and there have been limited attempts to use nanofluids in other popular separation processes such as liquid-liquid extraction. 13,[37][38][39][40][41]<...>…”

Experimental study of CO 2 absorption in aqueous MEA and MDEA solutions enhanced by nanoparticles

“…Seyf and Nikaaein (2012) investigated the effect of nanoparticle size and Brownian motion of nanoparticles on the thermal performance of a micro-channel heat sink. Keshishian et al (2013) studied the effect of silica nanoparticles on the mass transfer in a circular tube by using the electrochemical limiting current technique, and they found that there existed an optimum volume fraction of nanoparticles for enhancing the mass transfer. However, the use and disposal of nanoparticles will inevitably lead to discharges to air, soils and aquatic systems and then they transport into and through the environment which can cause environmental pollution and do harm to human health due to their reactivity and toxicity (Ju-Nam and Lead, 2008).…”