Absorption of VOCs in a Rotating Packed Bed

Abstract

A Higee absorption process was developed to remove VOCs (volatile organic compounds) from air into an aqueous phase under a centrifugal field. The experimental results showed that the overall volumetric gas-phase mass-transfer coefficient (K G a) increased as a function of the gas Grashof number (Gr G ) to the power of 0.18. In analyzing k G and a individually, it was found that the enhancement of mass transfer by the centrifugal force can mainly be attributed to an increase in the effective gas-liquid interfacial area. The values of k G lie in a range similar to that for conventional packed beds.

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].…”

“…Chen and Liu [14] adopted an RPB that was equipped with random packings to remove single VOCs by absorption. They separately used the VOCs used isopropyl alcohol, acetone, and ethyl acetate.…”

Performance and Kinetic Evaluation of Ethyl Acetate Biodegradation in a Biofilter Using Pseudomonas Putida

“…Current technologies for the VOCs removal are physical techniques [5,6], chemical methods [7] and biological processes such as biofiltration, biotrickling bed filters and bioscrubbers. Biological process for the VOCs removal is highly efficient and more effective and economical than traditional methods [8][9][10].…”

Gas‐phase mass transfer characteristics in a counter airflow shear rotating packed bed

“…To improve the mass transfer efficiency, the rotating packed bed (RPB) was proposed as a novel gas-liquid contactor by Ramshaw and Mallison, [1] which generates a centrifugal force up to several hundred times greater than gravitational force. [2][3][4] Liquid-phase mass transfer in RPBs has been investigated extensively, and a large improvement in liquid-phase mass transfer coefficient is obtained in RPBs compared with that of conventional packed beds. [5][6][7][8][9] However, there is no improvement in gas-phase mass transfer coefficient in RPBs, which was reported by many researchers.…”

“…After completing the absorption of CO 2 into the aqueous NaOH solution, the CO 2 cylinder is closed and the NH 3 cylinder is opened for the absorption of NH 3 into H 2 O. A REA CO 2 analyzer is used to analyze the CO 2 concentration of inlet and exit gas, and a GT-2000 NH 3 analyzer is used to analyze the NH 3 concentration of inlet and exit gas. In this experiment, the NH 3 concentration of inlet gas was maintained at 600 mg Á m À3 and the CO 2 concentration of inlet gas was maintained at 12 000 mg Á m À3 .…”