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Concurrent and modulated separation of CO 2 and O 2 by a fluorite/perovskite‐based membrane
Author(s) -
FabiánAnguiano José Artemio,
OrtegaLugo Rubén,
RamírezMoreno Margarita Judith,
Zeifert Beatriz,
GómezYáñez Carlos,
OrtizLanderos José
Publication year - 2021
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.13739
Subject(s) - materials science , permeation , fluorite , permeance , ceramic , membrane , perovskite (structure) , chemical engineering , chemical stability , ternary operation , thermal stability , ionic bonding , oxide , ceramic membrane , analytical chemistry (journal) , inorganic chemistry , chemistry , composite material , metallurgy , chromatography , organic chemistry , ion , biochemistry , computer science , engineering , programming language
In this paper, it is reported the fabrication of a new dense ceramic‐molten carbonate membrane used for the selective separation of carbon dioxide (CO 2 ) and oxygen (O 2 ) at elevated temperatures (850‐950°C). First, it was chemically synthesized a fluorite/perovskite ceramic oxide with mixed ionic‐electronic conduction properties and general formula Ce 0.9 Pr 0.1 O 2‐δ /Pr 0.6 Sr 0.4 Fe 0.5 Co 0.5 O 3‐δ (CP‐PSFC, 60:40 wt%) by the citrate‐ethylene‐diamine‐tetra acetic acid (EDTA) route. Then, a disk‐shaped porous ceramic support partially sintered was infiltrated with a ternary mixture of molten salts of Li 2 CO 3 /Na 2 CO 3 /K 2 CO 3 composition. The permeation measurements at high temperatures suggest a concurrent separation of both species CO 2 and O 2 . The system exhibits high permeance of CO 2 and O 2 by rising to maximum values of 2.17 × 10 −7 and 0.69 × 10 −7 mol m −2 s −1 Pa −1 , respectively at 950°C. Moreover, the possibility of modulating the permeate CO 2 :O 2 ratio is envisaged by changing the fluorite to perovskite proportion in the membrane composition. The stability performance of the obtained membrane was studied under a long‐term permeation test. It exhibits a remarkable thermal and chemical stability during 110 h at 875°C. This way, it corroborated the proposed new ceramic phase's excellent properties for the fabrication of supported ceramic‐molten carbonate membranes.