CO2 Separation by Using a Three-stage Membrane Process

Abstract

This work proposed and optimized a three-stage membrane process for CO 2 separation. The results of this study revealed that the membrane technology is a suitable process for the CO 2 separation in a higher concentration. In addition, the MATLAB was used to simulate and obtain the optimal operational parameters for a three-stage membrane process. This work established a partial cycle and recovered the CO 2 from the permeation side of second-stage membrane that enhance a higher purity CO 2 gas stream. The results of this study indicated that when the CO 2 concentration was higher than 50% and at a flow rate of 100000 Nm 3 d -1 , the CO 2 separation could be achieved at the optimal operation condition. Under the conditions that the membrane areas were 2400, 3800, and 1800 m 2 for the first-, second-, and third-stage membrane, respectively and the operational pressure at first-and third stage membrane were 3.0 and 2.5 MPa, respectively, the CO 2 separation fraction was higher than 90% and CH 4 loss rate was lower than 5%. The results of this study have a high potential for the practical application.

Analysis of CO2 Migration in Horizontal Saline Aquifers during Carbon Capture and Storage Process

“…Post-combusted technologies are mostly used, since these processes appeared in the beginning of CCS processes and are more developed [22,23]. Capture technologies incorporate various techniques for CO 2 separation, such as absorption, separation with membranes, and adsorption [24]. These techniques are based on physical, chemical, and even biological systems.…”

Efficient Facilitated Transport Polymer Membrane for CO2/CH4 Separation from Oilfield Associated Gas

“…The flow rate and CO 2 content of the oilfield associated gas fluctuate greatly with time, which cannot be reinjected, stored, and utilized directly [ 17 ]. In the initial stage of CO 2 -EOR, the oilfield associated gas features a low flow rate, low concentration of CO 2 (~5 vol%), and high concentration of CH 4 (~75 vol%) [ 18 ]. While in the advanced stage of CO 2 -EOR, the CO 2 content gradually increases, and finally stabilizes at 60~80 % [ 19 ].…”

Sensitivity Analysis of Carbonate Looping Process Using Twin Fluidized Bed Model

“…There have been many methods in the literature about post-combustion CO2 captures, such as absorption (Porter et al, 2015), adsorption (Shah and Imae, 2016), cryogenic (Yuan et al, 2014), chemical looping (Leion et al, 2008) and membrane (Zhao et al, 2018;Yang et al, 2019). However, these processes have some bottlenecks including enormous energy losses of 8-14% which increase fuel consumption and environmental concern regarding solvent regeneration (Lasheras et al, 2011;Oh et al, 2016;Liu et al, 2019a, b). In addition, some researchers have proposed that the chemical looping combustion consumes less energy to separate CO2 from flue gas, but this method still need full-scale experimental development (Abad et al, 2007;Leion et al, 2008).…”