[논문]Performance of Electrochemical Cell to Produce Acid and Alkali for nCaCO3 Production Using Waste Inorganics

Iqbal, Muhammad Ibrahim; Abbas, Syed Asad; Mehmood, Asad; Kim, Seong-Hoon; Ha, Heung Yong; Jung, Kwang-Deog

doi:10.1149/2.0221713jes

Performance of Electrochemical Cell to Produce Acid and Alkali for nCaCO3 Production Using Waste Inorganics

Journal of the Electrochemical Society : JES, v.164 no.13, 2017년, pp.F1286 - F1293

Iqbal, Muhammad Ibrahim (aDepartment of Clean Energy and Chemical Engineering, University of Science and Technology, 217, Gajeong-ro Yuseong-gu, Daejeon, Korea) , Abbas, Syed Asad (aDepartment of Clean Energy and Chemical Engineering, University of Science and Technology, 217, Gajeong-ro Yuseong-gu, Daejeon, Korea) , Mehmood, Asad (cEnergy Convergence Research Center, Korea Institute of Science and Technology, Cheongryang, Seoul 136-791, Korea) , Kim, Seong-Hoon (bClean Energy Research Center, Korea Institute of Science and Technology, Cheongryang, Seoul 136-791, Korea) , Ha, Heung Yong (cEnergy Convergence Research Center, Korea Institute of Science and Technology, Cheongryang, Seoul 136-791, Korea) , Jung, Kwang-Deog (aDepartment of Clean Energy and Chemical Engineering, University of Science and Technology, 217, Gajeong-ro Yuseong-gu, Daejeon, Korea)

Abstract ▼ AI-Helper

If an electrolysis system can produce both HCl for Ca extraction and NaOH for carbonation with low energy consumption, mineralization of waste inorganics becomes an economically feasible approach to mitigate environmental CO2 emissions. For this purpose, NaCl electrolysis system with three compartments was fabricated: 1) an anode compartment for hydrogen oxidation, 2) a cathode compartment for hydrogen evolution, and (3) a central compartment between the anionic and cationic exchange membrane where the NaCl solution is introduced. Both 1 M NaOH and HCl were successfully co-produced with a caustic efficiency of 83.6% in the three-compartment cell from a 25 wt% NaCl solution at 1.5 V. Under those conditions, the equilibrium cell potential was 0.83 V. The current density under the optimized operating conditions was 40 mA cm(geo)(-2), and the overpotentials of the cathode (1.0 mg Pt cm(-2)) and anode (0.2 mg Pt cm(-2)) were 0.09 V and 0.05 V, respectively. (c) 2017 The Electrochemical Society. All rights reserved.

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Performance of Electrochemical Cell to Produce Acid and Alkali for nCaCO3 Production Using Waste Inorganics

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Performance of Electrochemical Cell to Produce Acid and Alkali for nCaCO3 Production Using Waste Inorganics

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