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Energy, Equipment and Cost Savings by Using a Membrane Unit in an Amine‐Based Absorption Process for CO 2 Removal
Author(s) -
Song Shankui,
Esche Erik,
Stünkel Steffen,
Brinkmann Torsten,
Wind Jan,
Shishatskiy Sergey,
Wozny Günter
Publication year - 2013
Publication title -
chemie ingenieur technik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 36
eISSN - 1522-2640
pISSN - 0009-286X
DOI - 10.1002/cite.201200242
Subject(s) - amine gas treating , absorption (acoustics) , membrane , process engineering , cascade , materials science , polyimide , oxidative coupling of methane , process (computing) , chemistry , methane , chemical engineering , waste management , chromatography , organic chemistry , engineering , computer science , layer (electronics) , composite material , biochemistry , operating system
A hybrid system consisting of a membrane unit and an amine‐based process for CO 2 removal in the oxidative coupling of methane is investigated experimentally and in simulations. Absorption processes with two different absorbents for removing 90 % of CO 2 from the feed stream are regarded as benchmarks and compared to the membrane process with respect to potential energy, equipment, and cost reductions. The results show that a membrane unit using polyimide could assist with CO 2 capture and lead to a reduction of the consumed energy per kilogram of CO 2 by 40 % and also reduce the size of the absorption columns. Alternative processes with a two‐step membrane cascade to enhance the recovery of product ethylene are also discussed.