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Mass Transfer Performance of Porous Nickel Manufactured by Lost Carbonate Sintering Process
Author(s) -
Zhu Pengcheng,
Zhao Yuyuan
Publication year - 2017
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.201700392
Subject(s) - materials science , porosity , nickel , mass transfer , mass transfer coefficient , sintering , electrolyte , porous medium , sherwood number , chemical engineering , electrode , metallurgy , composite material , turbulence , chemistry , thermodynamics , chromatography , reynolds number , physics , nusselt number , engineering
Open cell porous metals are excellent electrode materials due to their unique electrochemical properties. However, very little research has been conducted to date on the mass transport of porous metals manufactured by the space holder methods, which have distinctive porous structures. This paper measures the mass transfer coefficient of porous nickel manufactured by the Lost Carbonate Sintering process. For porous nickel samples with a porosity of 0.55–0.75 and a pore size of 250–1500 μm measured at an electrolyte flow velocity of 1–12 cm s −1 , the mass transfer coefficient is in the range of 0.0007–0.014 cm s −1 , which is up to seven times higher than that of a solid nickel plate electrode. The mass transfer coefficient increases with pore size but decreases with porosity. The porous nickel has Sherwood numbers considerably higher than the other nickel electrodes reported in the literature, due to its high real surface area and its tortuous porous structure, which promotes turbulent flow.