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Dual‐phase membrane reactor for hydrogen separation with high tolerance to CO 2 and H 2 S impurities
Author(s) -
Cai Lili,
Hu Shiqing,
Cao Zhongwei,
Li Hongbo,
Zhu Xuefeng,
Yang Weishen
Publication year - 2019
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.16491
Subject(s) - membrane , hydrogen , membrane reactor , impurity , catalysis , oxygen , analytical chemistry (journal) , chemical engineering , materials science , hydrogen purifier , hydrogen production , membrane technology , chemistry , diffusion , chromatography , thermodynamics , organic chemistry , biochemistry , physics , engineering
Catalytic membrane reactors based on oxygen‐permeable membranes are recently studied for hydrogen separation because their hydrogen separation rates and separation factors are comparable to those of Pd‐based membranes. New membrane materials with high performance and good tolerance to CO 2 and H 2 S impurities are highly desired. In this work, a new membrane material Ce 0.85 Sm 0.15 O 1.925 –Sr 2 Fe 1.5 Mo 0.5 O 6‐δ (SDC–SFM) was prepared for hydrogen separation. It exhibits high conductivities at low oxygen partial pressures, which is benefit to electron transfer and ion diffusion. A high hydrogen separation rate of 6.6 mL cm −2 min −1 was obtained on a 0.5‐mm‐thick membrane coated with Ni/SDC catalyst at 900°C. The membrane reactor was operated steadily for 532 h under atmospheres containing CO 2 and H 2 S impurities. Various characterizations reveal that SDC–SFM has good stability in the membrane reactor for hydrogen separation. All facts confirm that SDC–SFM is promising for hydrogen separation in practical applications. © 2018 American Institute of Chemical Engineers AIChE J , 65: 1088–1096, 2019