TY - JOUR

T1 - Membrane reformer module with Ni-foam catalyst for pure hydrogen production from methane

T2 - Experimental demonstration and modeling

AU - Shigarov, A. B.

AU - Кirillov, V. A.

AU - Аmosov, Y. I.

AU - Brayko, A. S.

AU - Avakov, V. B.

AU - Landgraf, I.

AU - Urusov, A. R.

AU - Jivulko, S. A.

AU - Izmaylovich, V. V.

PY - 2017/3/9

Y1 - 2017/3/9

N2 - Results of experiments and modeling of a compact (800 cm3) membrane reformer module for the production of 0.25–0.30 Nm3/h hydrogen by methane steam reforming are reported. The module consists of a two-sided composite membrane disc with a 50 μm Pd[sbnd]Ag layer and two adjacent 4 mm thick Ni foam discs (60 ppi). A nickel catalyst and a porous support were deposited on the foam discs to give the final composition of 10%Ni/10%MgO/Ni-foam. Membrane permeability by pure hydrogen was investigated, and coefficients of transverse hydrogen transport across the Ni foam to the membrane in the case of inlet binary N2[sbnd]H2 mixture were refined in order to account for concentration polarization effect into the model. Activity of the catalytic discs was measured in a differential laboratory scale reactor at a pressure of 1 bar and temperature of 400–600 °C. Modules were tested at a 8–13 bar pressure of the mixture in the reforming zone and at 1 bar of pure hydrogen under the membrane, H2O/C = 2.5–3 and a module temperature of 550–680 °C (with and without hydrogen removal). Two modifications of the module were tested: consecutive (I-type) and parallel (II-type) flow of the reaction mixture around two sides of the membrane disc. In order to optimize construction of the module, calculations were made for revealing the effect of thickness of the Pd[sbnd]Ag membrane layer (5–50 μm), thickness of the Ni foam discs (0.5–8 mm) and temperature (600–700 °C) on the hydrogen output of the module. A comparison of the values obtained in our experiments (>1 MW/m3 and >0.7 kg(H2)/h/m2) with the literature data reported by other authors showed that the developed modules are promising for practical application as components of a fuel processor section for mobile applications.

AB - Results of experiments and modeling of a compact (800 cm3) membrane reformer module for the production of 0.25–0.30 Nm3/h hydrogen by methane steam reforming are reported. The module consists of a two-sided composite membrane disc with a 50 μm Pd[sbnd]Ag layer and two adjacent 4 mm thick Ni foam discs (60 ppi). A nickel catalyst and a porous support were deposited on the foam discs to give the final composition of 10%Ni/10%MgO/Ni-foam. Membrane permeability by pure hydrogen was investigated, and coefficients of transverse hydrogen transport across the Ni foam to the membrane in the case of inlet binary N2[sbnd]H2 mixture were refined in order to account for concentration polarization effect into the model. Activity of the catalytic discs was measured in a differential laboratory scale reactor at a pressure of 1 bar and temperature of 400–600 °C. Modules were tested at a 8–13 bar pressure of the mixture in the reforming zone and at 1 bar of pure hydrogen under the membrane, H2O/C = 2.5–3 and a module temperature of 550–680 °C (with and without hydrogen removal). Two modifications of the module were tested: consecutive (I-type) and parallel (II-type) flow of the reaction mixture around two sides of the membrane disc. In order to optimize construction of the module, calculations were made for revealing the effect of thickness of the Pd[sbnd]Ag membrane layer (5–50 μm), thickness of the Ni foam discs (0.5–8 mm) and temperature (600–700 °C) on the hydrogen output of the module. A comparison of the values obtained in our experiments (>1 MW/m3 and >0.7 kg(H2)/h/m2) with the literature data reported by other authors showed that the developed modules are promising for practical application as components of a fuel processor section for mobile applications.

KW - Hydrogen production

KW - Membrane reactor

KW - Methane steam reforming

KW - Modeling

KW - Pd membrane

KW - REACTOR

KW - SUPPORTS

KW - CERAMIC FOAM

KW - CH4

KW - NATURAL-GAS

UR - http://www.scopus.com/inward/record.url?scp=85008704866&partnerID=8YFLogxK

U2 - 10.1016/j.ijhydene.2016.12.057

DO - 10.1016/j.ijhydene.2016.12.057

M3 - Article

AN - SCOPUS:85008704866

VL - 42

SP - 6713

EP - 6726

JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

SN - 0360-3199

IS - 10

ER -