Combined photolysis and catalytic ozonation of dimethyl phthalate in a high-gravity rotating packed bed

Treatment of a simulated phenolic effluent by heterogeneous catalytic ozonation using Pt/Al2O3

“…The most susceptible compounds to ozonation are those containing C−C double bonds outside the aromatic ring and specific functional groups (e.g. OH, CH 3 , CH 3 O) [23]. It is therefore possible to establish a relation between the number and type of aromatic ring substitute groups, the type of bonds and the reactivity of the acids once molecular ozone attacks preferentially through electrophilic pathways, which is enhanced by the presence of a high electronic density due to donating groups in the benzenic ring, such as methoxy (CH 3 O) and hydroxyl (OH) [30].…”

“…Those utilized in ozonation comprise mostly transient metals, with and without ceramic supports, while, in recent literature, some noble metals such as Ru, Pt, Rh, Ir and Pd have also been applied in the gaseous and aqueous phase [19][20][21]. Pt/Al 2 O 3 was the most effective for formic acid removal, according to Lin et al [22], and Pt/γ -Al 2 O 3 clearly enhanced the mineralization of phenol and intermediates and, to a lesser extent, the dimethyl phthalate under the experimental conditions used by Chang et al [21,23]. The mechanism of these catalysts was explained by Legube and Karpel Vel Leitner [24].…”

Carbon dioxide absorption in a cross-flow rotating packed bed

“…Chen et al, 2005a,b;Liu, 2006, 2007), reactive precipitation (Chen et al, 2000(Chen et al, , 2003Wang et al, 2004) and ozone oxidation Y.H. Chen et al, , 2005Shang et al, 2006;Chiu et al, 2007;Ku et al, 2008;Chang et al, 2009). To remove CO 2 from a gas stream containing CO 2 with a huge flow rate, Lin and Chen (2007) first adopted the crossflow RPB for the CO 2 removal by chemical absorption with the NaOH aqueous solution, proposing that the cross-flow RPB had a great potential for the CO 2 removal from the exhausted gases.…”

Removal of methanol and 1-butanol from binary mixtures by absorption in rotating packed beds with blade packings

“…Hence, the RPB increased the area of contact between gas and liquid and reduced the total resistance to mass transfer, considerably reducing the size of the equipment and the capital and operating costs [10]. The RPB has been extensively utilized for distillation [11][12][13], VOCs absorption [14][15][16][17][18][19][20], CO 2 absorption [21][22][23][24][25][26][27][28][29], O 3 absorption [30][31][32], ozonation [33][34][35][36][37][38][39][40], reactive precipitation [41][42][43][44][45][46][47][48][49][50][51][52], and stripping [53,54].…”