2000 Fiscal Year Final Research Report Summary
Development of Oxygen Transport Membranes Using Co(II)-complexes Fixed in Zeolites
| Project/Area Number |
10555312
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| Research Category |
Grant-in-Aid for Scientific Research (B).
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| Allocation Type | Single-year Grants |
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| Section | 展開研究 |
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| Research Field |
無機工業化学
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| Research Institution | HIROSHIMA UNIVERSITY |
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Principal Investigator |
SHIOTANI Masan Faculty of Applied Engineering, Applied Chemistry, HIROSHIMA UNIVERSITY, Professor, 工学部, 教授 (80002137)
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| Co-Investigator(Kenkyū-buntansha) |
YAHIRO Hidenori Faculty of Applied Engineering, Ehime University, Applied Chemistry, Associate Professor, 工学部, 助教授 (90200568)
TAGAKI Yoshiteru Faculty of Applied Engineering, Applied Chemistry, HIROSHIMA UNIVERSITY, Research Associate, 工学部, 助手 (30325146)
KOMAGUCHI Kenjj Faculty of Applied Engineering, Applied Chemistry, HIROSHIMA UNIVERSITY, Research Associate, 工学部, 助手 (80291483)
NITTA Masahiro Faculty of Applied Environmental Engineering, Hiroshima Institute of Technology, Applied Chemistry, Professor, 環境学部, 教授 (40002034)
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| Project Period (FY) |
1998 – 2000
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| Keywords | adsorptio and desoption of O_2 / zeolites / cobalt phthalocvanine / axial ligand / oxygen adduct / ESR / nitrogen oxide / molecular motion |
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| Research Abstract |
(1) Cobalt phthalocyanine (Co(II)Ph) complexes were synthesized inside the large cavities of Y-type and MCM41-type zeolites. A formation of the oxygen molecule adducts was clearly observed in both zeolites with Co(II)Ph by ESR method when O_2 molecules were introduced into the CoPc complexes with ammonia, ter-buthylamine and other amines as an axial ligand. Number of the oxygen molecules adducted to Co(II)Pc was studied as a function of axial ligands, oxygen pressures, temperatures, and others. The optimized conditions of O_2 absorption-desoption on the CoPc fixed were discussed based on the experimental results. Furthermore, the reversibility of the O_2 adsorption-desorption reactions and the diffusion and stabilization of un-reacted O_2 molecules were discussed in terms of the stability and bulkiness of the axial ligand used.
(2) Effects of axial ligands out O_2/N_2 selectivities of oxygen facilitated transport membranes containing a Co(II)-complex, N,N-bis(3-methoxysalicylidene)-2-methylpropylenediaminato-Co(II), was studied using 4-dimethylaminopyridine (4-DMAP), dimethyl sulfoxide (DMSO) and pyrazine as an axial ligand. The O_2/N_2 selectivities of the membranes resulted in 160, 3 and 2.2, respectively. Based on the results the reaction mechanisms were discussed in terms of oxygenetion and deoxygenation raters.
(3) Paramagnetic NO_x(x=1.2) molecules adsorbed on metal ion exchanged zeolites were studied in order to get fundamental information about the relations between the adsorption-desorption reactions and the static-dynamic structures of gaseous molecule related to O_2 in micro-porous crystals.
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Research Products
(12 results)
