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- W2350247776 abstract "ABSTRACT BACKGROUND In this work, well‐intergrown zeolitic imidazolate frameworks‐8 ( ZIF ‐8) membrane was synthesized through a microwave‐assisted secondary solvothermal growth method. A solvent evaporation seeding method was applied prior to membrane growth. Subsequently, process optimization for the separation of CO 2 from natural gas through the ZIF ‐8 membrane was studied using response surface methodology. The process variables studied included CO 2 feed composition (36–83%), total pressure difference (100–700 kPa ) and temperature (303–343 K). Three empirical models were generated using a central composite design in order to study the interaction between the process variables and the responses, including CO 2 permeance, CH 4 permeance and CO 2 / CH 4 separation factor. The optimum condition was then determined for maximum CO 2 permeance and CO 2 / CH 4 separation factor and minimum CH 4 permeance. RESULTS Using this method, ZIF ‐8 seeds of nano‐size were well distributed on the support due to high nucleation rate at the supersaturation condition. The presence of heavy hydrocarbons affected CH 4 permeance, attributed to the molar mass and viscosity. An optimum CO 2 permeance of 2.76 × 10 −8 mol m −2 s −1 Pa −1 and CO 2 / CH 4 separation factor of 3.72 was obtained at 312 K, 100 kPa and 36% CO 2 feed composition. The experimental results were in agreement with the predicted values with an average error lower than ± 7%. CONCLUSION Selective ZIF ‐8 membrane was successfully synthesized using a feasible and reproducible solvent evaporation seeding method. The experimental data for the optimum condition were in good agreement with the predicted data, showing the accuracy of the empirical models. © 2016 Society of Chemical Industry" @default.
- W2350247776 created "2016-06-24" @default.
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- W2350247776 date "2016-06-02" @default.
- W2350247776 modified "2023-10-05" @default.
- W2350247776 title "Synthesis of zeolitic imidazolate frameworks (ZIF)-8 membrane and its process optimization study in separation of CO<sub>2</sub>from natural gas" @default.
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- W2350247776 doi "https://doi.org/10.1002/jctb.5021" @default.
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