Simulated the composition of petrochemical industry tail gas and using polysulfone hollow fiber membranes to separate hydrogen

• Main Authors: Shan-chun Mou, 牟善群
• Other Authors: none
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/50650957257406805445

碩士 === 國立高雄第一科技大學 === 環境與安全衛生工程研究所 === 103 === The study simulated tail gas of petrochemical industry, using different component of mixture gas (H2/CH4 =30:70, H2/CH4 =50:50, H2/CH4 = 70:30, H2/CH4 /C3H8= 30:50:20, H2/CH4 /C3H8 = 50:30:20) as the feed gas, which separated and pured by the polysulfone hollow fiber membrane . By adjusting the feed pressure, exhausted gas flow, pressure gap, temperature, series and parallel operation, observing the influence of different parameters on the permeate hydrogen concentration and recovery of permeation hydrogen . Results are shown in maintaining the feed of about 2 - 3.5 kg/cm2, the different components of mixture gas can both get the best recovery of permeation hydrogen, while the feed gas pressure can be increased to improve the ability of hydrogen permeation, but over high pressure will also increase the permeation of methane and propane, reducing the hydrogen permeation . In the same conditions, the hydrogen is more in the feed gas, the ability of passing through the membrane is better, because the higher hydrogen content make the inner pressure of mixture gas is also better, also can get the better hydrogen permeate rate . The driving force of system, can be increased by adjusting exhaust flow, improve the ability of hydrogen–permeable and hydrogen concentration, but over high exhaust flow also reduce the hydrogen permeation recovery. The driving force of gas-permeable is the pressure gap between membrane, increasing the pressure gap can also increase the hydrogen concentration and hydrogen permeation rate . Temperature will change the mean free path of the gas, making the gas molecules collide more easily, improving the ability of the gas diffusion, which make hydrogen concentration in the permeate gas flow, but make the hydrogen permeation rate better. Series operation can effectively the improve the hydrogen concentration, but not suitable for improving the hydrogen permeation rate . The parallel operation can effectively improve the hydrogen permeation rate, but not suitable for improving the hydrogen concentration .