Curbing the greenhouse effect by carbon dioxide adsorption with Zeolite 13X

Abstract

in Wiley InterScience (www.interscience.wiley.com).The removal of carbon dioxide (CO 2 ) from industrial emissions has become essential in the fight against climate change. In this study, we employed Zeolite 13X for the capture and recovery of CO 2 in a flow through system where the adsorbent was subjected to five adsorption-desorption cycles. The influent stream contained 1.5% CO 2 at standard conditions. The adsorbent bed was 1 in. in length and 1 in. 3/8 in dia., and was packed with 10 g of the zeolite. Temperature swing adsorption (TSA) was employed as the regeneration method through heating to approximately 135 8C with helium as the purge gas. The adsorbent capacity at 90% saturation was found to decrease from 78 to 60g CO 2 /kg Zeolite13X after the fifth cycle. The CO 2 capture ratio or the mass of CO 2 adsorbed to the total mass that entered the system decreased from 63% to only 61% after the fifth cycle. The CO 2 recovery efficiency ranged from 82 to 93% during desorption, and the CO 2 relative recovery, i.e., CO 2 desorbed for the nth cycle to CO 2 adsorbed for the first cycle, ranged from 88 to 68%. The service life of the adsorbent was determined to be equal to eleven cycles at a useful capacity of 40g CO 2 /kg Zeolite13X .

Post-combustion CO2 capture with a commercial activated carbon: Comparison of different regeneration strategies

“…The concentration of CO 2 in the flow at any given point in the bed is a function of time, resulting from the movement of the concentration front in the bed. Konduru et al [20] proposed a graphical method to calculate the first term of Equation 1 from the ratio of the adsorbed area (A t ) on the total area (A tot ) of the CO 2 breakthrough curve, according to the following equation: [2] where m A is the mass of CO 2 adsorbed; A t is the area (%v/v min) above the breakthrough curve at time t; A tot is the total area (%v/v min) at time t and m tot is the total mass of CO 2 that has entered the system at time t. The latter one can be computed from the inlet molar flowrate of CO 2 (mol min -1 ), the duration time of the cycle (min) and the CO 2 molecular weight (g mol -1 ). Figure conditions (see Figure 5c), was selected.…”

“…Within TSA technologies, the specific case in which the solid is heated by the Joule effect is commonly referred to as electric swing adsorption (ESA) [5,6]. The vast majority of studies dealing with CO 2 post-combustion capture by means of PSA or TSA technologies use zeolites as adsorbent [6][7][8][9][10][11][12][13][14][15][16][17][18][19][20]. Zeolite 13X is by far the adsorbent most extensively studied in CO 2 separation processes, due to its high selectivity to CO 2 [21].…”

Near-Zero Emissions Oxy-Combustion Flue Gas Purification

“…Konduru et al (30) presented experimental data for a (TSA Thermal Swing Adsorption) process using 13 X Zeolite. Feed has 1.5% CO 2 .…”

Aluminophosphate monoliths with high CO2-over-N2 selectivity and CO2 capture capacity

“…This irreversible reduction is probably related to chemisorption of CO 2 on 13X granules as the reduced CO 2 capacity between the two cycles cannot be overcome without high temperature regeneration. 50,51 It should be noted that the ue gas contains water vapors which could reduce the CO 2 capture capacity of AlPO 4 monoliths and 13X granules further. However, it has been reported that aluminophosphates are less hydrophilic at lower partial pressure of water vapors.…”