Optimization of asymmetric hollow fiber membranes for natural gas separation
主要譯著者：Canghai Ma
出版機構：Georgia Institute of Technology
出版日期：2011-4-5
出版地：http://hdl.handle.net/1853/43700
Compared to the conventional amine adsorption process to separate CO? from natural gas, the membrane separation technology has exhibited advantages in easy operation and lower capital cost. However, the high CO? partial pressure in natural gas can plasticize the membranes, which can lead to the loss of CH? and low CO?/CH? separation efficiency. Crosslinking of polymer membranes have been proven effective to increase the CO? induced plasticization resistance by controlling the degree of swelling and segmental chain mobility in the polymer. This thesis focuses on extending the success of crosslinking to more productive asymmetric hollow fibers. In this work, the productivity of asymmetric hollow fibers was optimized by reducing the effective selective skin layer thickness. Thermal crosslinking and catalyst assisted crosslinking were performed on the defect-free thin skin hollow fibers to stabilize the fibers against plasticization. The natural gas separation performance of hollow fibers was evaluated by feeding CO?/CH? gas mixture with high CO? content and pressure.