The removal of volatile organic compounds from supply air using a desiccant column – A theoretical study

Flexible and mechanically-stable MIL-101(Cr)@PFs for efficient benzene vapor and CO2adsorption

“…Thus, the use of adsorbents with high adsorption capacity would be an ideal solution for the efficient removal of VOCs and CO 2 . However, it was reported that the conventional adsorbents, such as activated carbon, 14,15 zeolite, 16,17 silica gel 18 showed low adsorption capacities towards VOCs and CO 2 , and the MOFs were thought as promising adsorption materials for VOCs and CO 2 capture and separation since they have much higher adsorption capacity towards VOCs and CO 2 compared to conventional adsorbents. Millward and Yaghi 19 reported that the CO 2 adsorption capacity of MOF-177 reached 33.5 mmol g À1 at 298 K and 35 bar.…”

Adsorption and Thermal Desorption of Volatile Organic Compounds in a Fixed Bed – Experimental and Modeling

“…Spent adsorbents can be recycled by thermal, chemical, microbiological or vacuum regeneration. In situ thermal regeneration at temperatures of 80-300 °C using steam (steaming) or inert gas (thermal swing adsorption (TSA)) as regeneration agents is commonly employed to recover both adsorbent and adsorbate in small-and large-scale systems (Ambrozek and Zwarycz-Makles, 2014;Giraudet et al, 2009;Lee et al, 2011;Nastaj et al, 2006;Ncube and Su, 2012;Salvador et al, 2015;Shah et al, 2014), whereas ex situ thermal regeneration at temperatures of 60-200 °C in an oven or a thermobalance may be applied to laboratory scale processes in order to recycle the adsorbent.…”

“…Many researches in the related literature aimed at predicting the dynamics of adsorption and desorption steps of fixed bed TSA process (Ambrozek and Zwarycz-Makles, 2014;Chuang et al, 2003;Giraudet et al, 2009;Lee et al, 2011;Nastaj et al, 2006;Ncube and Su, 2012;Rezaei et al, 2014). A mathematical model describing the adsorption of VOC Downloaded by [Nanyang Technological University] at 14:58 16 June 2016 species from a gas flow onto fixed bed adsorbent and the species desorption from the spent adsorbent using an inert purge gas usually includes characteristic equations of: (i) species mass balance in the gas phase flowing through the bed, (ii) species mass balance within the adsorbent particle, (iii) heat balance in the system, (iv) species mass transfer rate, (v) species equilibrium relationship and (vi) pressure drop across the bed.…”