Abstract
Removal of CO2 in landfill gas recovery processes and fractured wells as well as its application in enhanced oil recovery and its environmental aspects are of interest. Also separation of CO2 from CH4 in Ethylene Oxide plant is an environmental policy of Marun Petrochemical Company. In the present work, a shell-fed hollow fiber module was modeled mathematically for CO2 separation from CH4. Finite difference method was used for solving the equations. Comparison between co-current and counter-current flow patterns showed that for all conditions, counter current pattern had better efficiency for CO2/CH4 separation. Influence of operating parameters such as feed pressure, permeate pressure, feed flow rate, fiber length and CO2 concentration of feed on separation efficiency of CO2/CH4 mixture was investigated. Also the effect of feed and permeate pressures on required membrane area showed that the membrane area increases by increasing permeate pressure and decreases by increasing feed pressure. The modeling offers valuable data about feasibility study and economical evaluation of a gas separation unit operation as a helpful unit in the industry.
Highlights
The focus of much of the new awareness has turned towards examining greenhouse gas emissions and their impact on global climate [1]
A differential mathematical model and an efficient numerical solution procedure based on orthogonal collocation and Quasi-Newton method was developed.Peer et al [31] presented a mathematical model for simulation of gas separation in hollow fiber membrane modules with all flow patterns
The mathematical model was applied for CO2/CH4 separation in a shell-fed hollow fiber module with cocurrent and counter-current flow patterns
Summary
The focus of much of the new awareness has turned towards examining greenhouse gas emissions and their impact on global climate [1]. A differential mathematical model and an efficient numerical solution procedure based on orthogonal collocation and Quasi-Newton method was developed.Peer et al [31] presented a mathematical model for simulation of gas separation in hollow fiber membrane modules with all flow patterns (cross-flow, counter-current and co-current). This model can be used for calculation of membrane performance or its required surface area for a specific separation. They considered as the membrane as a unit consisting of many sections and derived equations from mass balance
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