期刊
KOREAN JOURNAL OF CHEMICAL ENGINEERING
卷 36, 期 4, 页码 563-572出版社
KOREAN INSTITUTE CHEMICAL ENGINEERS
DOI: 10.1007/s11814-019-0237-7
关键词
Pd-Cu Membrane; Hydrogen Separation; Hydrogen; Carbon Dioxide Mixture; Counter-current Flow Module
资金
- National Strategic Project-Carbon Reuse of the National Research Foundation of Korea (NRF) - Ministry of Science and ICT
- Ministry of Environment
- Ministry of Trade, Industry, and Energy [2017M3D8A2084029]
Two Pd-Cu alloy membrane modules were designed to recover high-purity hydrogen from a mixture at elevated temperature and pressure. Permeation and separation behavior were studied experimentally and theoretically using pure hydrogen gas and a binary mixture of H-2/CO2 (58.2: 41.8 in vol%) at 250-350 degrees C and 800-1,200 kPa. The Pd-Cu membrane modules presented a maximum permeation flux at the highest temperature (350 degrees C) and pressure (1,200 kPa) both for pure H-2 gas and the binary mixture. When the permeate and retentate flowed in the same direction in the membrane module (co-current flow), a temperature gradient and permeation flux variations were observed and the permeance of the H-2/CO2 mixture was 2.263x10(-4) mL/(cm(2).s.Pa-0.5) at 250 degrees C and 3.409x10(-4) mL/(cm(2).s.Pa-0.5) at 350 degrees C. On the other hand, when the retentate flowed in the opposite direction to the permeate flow (counter-current flow), the temperature gradient and permeation flux variations were significantly reduced and the permeation flux improved by about 11% from that of the co-current flow module. The well-distributed temperature profile inside the module and increased hydrogen pressure difference through the membrane layer shortened the time to reach the steady state in the counter-current Pd-Cu membrane module, thus enhancing the membrane performance. The results of this study can contribute towards developing an efficient Pd-Cu membrane reactor.
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