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CO2 capture by means of an enzyme-based reactorWe report a means for efficient and selective extraction of carbon dioxide (CO(2)) at low to medium concentration from mixed gas streams. CO(2) capture was accomplished by use of a novel enzyme-based, facilitated transport contained liquid membrane (EBCLM) reactor. The parametric studies we report explore both structural and operational parameters of this design. The structural parameters include carbonic anhydrase (CA) concentration, buffer concentration and pH, and liquid membrane thickness. The operational parameters are temperature, humidity of the inlet gas stream, and CO(2) concentration in the feed stream. The data show that this system effectively captures CO(2) over the range 400 ppm to at least 100,000 ppm, at or around ambient temperature and pressure. In a single pass across this homogeneous catalyst design, given a feed of 0.1% CO(2), the selectivity of CO(2) versus N(2) is 1,090 : 1 and CO(2) versus O(2) is 790 :1. CO(2) permeance is 4.71 x 10(-8) molm(-2) Pa(-1) sec(-1). The CLM design results in a system that is very stable even in the presence of dry feed and sweep gases.
Document ID
20040087666
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Cowan, R. M.
(Sapient's Institute New Brunswick, New Jersey, United States)
Ge, J-J
Qin, Y-J
McGregor, M. L.
Trachtenberg, M. C.
Date Acquired
August 21, 2013
Publication Date
March 1, 2003
Publication Information
Publication: Annals of the New York Academy of Sciences
Volume: 984
ISSN: 0077-8923
Subject Category
Life Sciences (General)
Distribution Limits
Public
Copyright
Other
Keywords
NASA Discipline Life Support Systems
Non-NASA Center

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