#TITLE_ALTERNATIVE#

• Main Author: SUSANTO (NIM 13001076), MARTIN
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/10856
• Institution: Institut Teknologi Bandung

CO2 dumping to the air is very dangerous for the atmosphere because it may cause Green House Effect. Sun radiations were not fully absorbed by earth, but some part of them were reflected outside the earth. Sun radiation reflection could not break green house layer. This research was intended to separate CO2 from N2 in combustion exhaust gas. Polysulfone membrane was used in this gas separation.<p> <br /> <br /> <br /> There were four stages: membrane preparation, pure gas permeation, mixed gas permeation, and membrane characterization. Pressures on the feed side were varied at 4, 6, 8, 10 and 12 bars, while on permeate side was atmospheric. Operations were conducted at room temperature. General assumptions were: gases behave ideally, mass transfer follow solution-diffusion mechanism, low gas solubility in membrane, low membrane thickness ratio to its length, ideal selectivity determination by divine pure CO2 to N2 permeability.<p> <br /> <br /> <br /> Diffusivity coefficients of CO2 in polysulfone range from 4,89 x 10-8 - 1,32 x 10-7 cm2/s, while diffusivity coefficients of N2 range from 7,62 x 10-8 – 1,59 x 10-7 cm2/s. N2 has smaller molecular weight than CO2 so N2 diffuses more easily in membrane than CO2. Permeability coefficients of CO2 range from 40,5-162 Barrer, while permeability coefficients of N2 range from 24,3-32,4 Barrer. Permeability of CO2 was associated with solubility of this gas in membrane surface, while permeability of N2 was associated with its diffusivity along the membrane. Solubility coefficients of CO2 in membrane range from 0,0826-0,1379 cm3STP/cm3.cmHg, while solubility coefficients of N2 range from 0,02026-0,04250 cm3STP/cm3.cmHg. Critical temperature of CO2 is higher than N2 so CO2 is more soluble in membrane than N2. Ideal selectivity on CO2/N2 separation ranges from 1,25-5. The value arises as feed pressure arises. Real separation factors of CO2/N2 on 10%, 15% and 20%-v/v CO2 mixed gas composition in polysulfone membrane are 1,98; 1,89 and 1,78.