Pervaporation was investigated as an alternative process for the separation of methanol from a mixture of C 4 and C, hydrocarbons and methyl ethers in the production of MTBE (methyl tertiary-butyl ether) and TAME (tertiary-amyl methyl ether). A preliminary screening of pervaporation membranes was performed by using reactor effluent produced in a pilot scale etherification reactor. Nafion and a cellulose based membrane were chosen for further testing and showed similar performance.

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In this study, modeling and optimization works were completed for the separation of 99.9 mol% of methyl ethyl ketone from water through a pressure-swing distillation process since the azeotropic composition varies very sensitively with the change of system pressure. PRO/II with PROVISION release 9.1 was used for the computer simulation and Wilson activity coefficient model was chosen as a modeling equation. A pressure-swing distillation process can be classified into a low-high pressure columns configuration and a high-low pressure columns configuration. In this work, each configurations were optimized for the minimization of steam consumptions, respectively and were compared.

In this study, the simulation was performed for the CO removal process using a composite membrane in DME production. The composite membrane, PEI-PDMS (polyetherimide-polydimethyl siloxane) manufactured by Airrane Co. Ltd., was used in the modeling through a commercial simulation design program, PRO/II with PROVISION 9.2 by Invensys. To simulate the process, the permeability constants of each of the pure component from Airrane Co. Ltd. were determined by regression analysis from the experimental data. The required separation membrane area and utility cost in the CO removal process were obtained using a chemical process simulator and composite membrane with a compatible permeability constant. DME 합성 반응기로 유입되는 원료 중에 이산화탄소가 3.00 mol% 이상이 포함될 경우 DME 생산성이 급격히 떨어지는 문제가 발생된다. 그리고 8.00 mol% 이상이 포 함될 경우에는 DME 생산성 저하 뿐만 아니라 미 반응된 합성가스의 유량이 증가되면서 DME 합성반응기 후단 공정인 DME 분리정제 영역에서 정상 상태를 벗어난 운 전이 전개될 수 있다. Key Words :