Alternative concept for SOFC with direct internal reforming operation: Benefits from inserting catalyst rod

Abstract

Mathematical models of direct internal reforming solid oxide fuel cell (DIR-SOFC) fueled by methane are developed using COMSOL V R software. The benefits of inserting Ni-catalyst rod in the middle of tubular-SOFC are simulated and compared to conventional DIR-SOFC. It reveals that DIR-SOFC with inserted catalyst provides smoother temperature gradient along the system and gains higher power density and electrochemical efficiency with less carbon deposition. Sensitivity analyses are performed. By increasing inlet fuel flow rate, the temperature gradient and power density improve, but less electrical efficiency with higher carbon deposition is predicted. The feed with low inlet steam/carbon ratio enhances good system performances but also results in high potential for carbon formation; this gains great benefit of DIR-SOFC with inserted catalyst because the rate of carbon deposition is remarkably low. Compared between counter-and co-flow patterns, the latter provides smoother temperature distribution with higher efficiency; thus, it is the better option for practical applications.

Characterization of CeO2 Promoter of a Nanocrystalline Ni/MgO Catalyst in Dry Reforming of Methane

“…Recently, CO 2 reforming (CH 4 + CO 2 2 CO + 2 H 2 ) attracted research interest for syngas production [1] and as chemical energy transmission system [2,3]. This process produces a unity ratio of syngas which can be preferentially applied for the production of Fischer-Tropsch liquid hydrocarbon and oxygenates [4].…”

A stable Ni/SBA-15 catalyst prepared by the ammonia evaporation method for dry reforming of methane

“…In recent years, dry reforming of methane (DRM) has received increasing attention for syngas production [1][2][3] and chemical energy transmission. 4 This process enables syngas production with a lower H 2 /CO ratio close to 1, which is more suitable for Fischer-Tropsch synthesis. 2 Besides, it shows a 20% lower operating cost compared to the commercial steam reforming of methane (SRM) in spite of the deactivation issues.…”

Configuration Development of Autothermal Solid Oxide Fuel Cell: A Review

“…This might be resulted of low rate of hydrogen and carbon monoxide generation and consumption. In order to increase these two rates, Dokamaingam et al [57] introduced tubular DIR-SOFC with inserting Ni/Al2O3 catalyst rod. As seen in Fig.…”

“…Concentration profiles of (a) methane and (b) hydrogen in the fuel channel in the conventional DIR-SOFC. Concentration profiles of (c) methane and (d) hydrogen in the fuel channel in the inserted catalyst rod DIR-SOFC[57].…”