Steam methane reforming at low S/C ratios for power-to-gas applications

Großmann, Katharina; Treiber, Peter; Karl, Jürgen

doi:10.1016/j.ijhydene.2016.08.007

Cited by 29 publications

(9 citation statements)

References 28 publications

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“…This type of carbon growth has been reported in studies of methane reforming with a Ni catalyst. [39][40][41] The size of the Ni particle at the tip of the fibers was significantly reduced compared to initially. (area 1 in Figure 3) shows a porous Ni/YSZ microstructure with strong connectivity between particles.…”

Section: Carbon Deposition and Microstructural Changes-from The Cellmentioning

confidence: 99%

Utilization of Bio-Syngas in Solid Oxide Fuel Cell Stacks: Effect of Hydrocarbon Reforming

Jeong

Hauser

Fischer

et al. 2019

J. Electrochem. Soc.

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We report on state-of-the-art JÜLICH (Forschungszentrum Jülich) stack with anode-supported solid oxide fuel cells (AS-SOFCs) that have been tested in bio-syngas derived from wood pellets. The sulfur and chlorine were removed after gasification, but the tars were not reformed in the bio-syngas to study the influence of these tars on the degradation of SOFC stack. The total tar content during test was 3.5 g/Nm 3 including benzene, toluene, phenol, m-cresol, naphthalene, and minor traces of undefined tars. The test result shows considerable performance degradation in tar-contaminated syngas. Moreover, the test was stopped after 5 hours of operation due to an increase of the pressure drop in the stack. A post-test analysis was carried out, and heavy carbon deposition was found at the cell anode-support surface and the Ni mesh current collector. Carbon was identified by SEM as numerous carbon fibers. The change of support microstructure was also observed near and under the carbon deposition area, and the dusting of Ni metal was observed in the support and Ni mesh current collector.

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Section: Carbon Deposition and Microstructural Changes-from The Cellmentioning

confidence: 99%

Utilization of Bio-Syngas in Solid Oxide Fuel Cell Stacks: Effect of Hydrocarbon Reforming

Jeong

Hauser

Fischer

et al. 2019

J. Electrochem. Soc.

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“…10 To implement DRM reaction as promising process at mild reaction conditions, i.e., lower reaction conditions, electrically promoted DRM, a strongly endothermic reaction, using renewable power is useful as a power-to-gas technology. 11,12 Thereby renewable and surplus electrical power can be stored chemically without large heat losses. Low-temperature dry reforming of the natural gas using catalysts offers opportunities to use the existing natural gas grid to store electricity generated from renewable resources.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Additionally, we can use gas from wells directly, including large amounts of CO 2 available around Asia. 12 From the perspective of catalysts for DRM reactions, active metal components are divided into two types: precious-metalsupported catalysts such as Ru, Rh, Pd, Ir, Pt, and base-metalsupported catalysts such as Fe, Co, Ni, and Cu. Many reports have described that precious metal-supported catalysts have good DRM activity without carbon deposition.…”

Section: ■ Introductionmentioning

confidence: 99%

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Role of Electric Field and Surface Protonics on Low-Temperature Catalytic Dry Reforming of Methane

Yabe

Yamada

Murakami

et al. 2019

ACS Sustainable Chem. Eng.

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The role of the electric field and surface protonics on low temperature catalytic dry reforming of methane was investigated over 1 wt % Ni/10 mol %La-ZrO 2 catalyst, which shows very high catalytic activity even at temperatures as low as 473 K. We investigated kinetic analyses using isotope and in situ diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS), and kinetic analyses revealed synergetic effects between the catalytic reaction and the electric field with less than one-fifth the apparent activation energy at low reaction temperatures. Results of kinetic investigations using isotopes such as CD 4 and 18 O 2 , in situ DRIFTS in the electric field, and density functional theory calculation indicate that methane dry reforming proceeds well by virtue of surface protonics. CH 4 and CO 2 were activated by proton collision at the Ni−La-ZrO 2 interface based on the "inverse" kinetic isotope effect.

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“…In general, the carbonaceous deposits exist in various configurations but for equilibrium calculations, graphitic carbon is assumed in general. 4,5 ■ STATE-OF-THE-ART…”

Section: ■ Introductionmentioning

confidence: 99%

Simulation-Based Evaluation of a Two-Stage Small-Scale Methanation Unit for Decentralized Applications

Neubert

Widzgowski

Rönsch³

et al. 2017

Energy Fuels

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The present work aims for a simulation-based evaluation of a two-stage methanation unit for the production of substitute natural gas (SNG) in decentralized small-scale applications with low complexity. Equilibrium calculations reveal a remarkable impact of CO 2 removal efficiency on final SNG composition with an optimum removal efficiency of 85% for the examined synthesis gas. The first methanation stage consists of a polytropic fixed-bed methanation reactor and is implemented as a one-dimensional pseudohomogeneous model in Aspen Plus TM with reaction kinetics from literature. The comparison of three different kinetic models reveals that reverse reaction of CO methanation has to be considered in the kinetic rate equations for appropriate modeling within a dynamic temperature range above 400 °C in case of polytropic reactors. The first methanation stage is examined with one kinetic model in terms of reactor geometry, varying GHSV and influence of the feed gas composition to determine limits in upscaling and avoidance of too high temperatures. A significant decrease of the reactor diameter favors the heat removal in case of polytropic reactor concept, whereas a higher GHSV causes higher outlet temperatures. The results show that an effective operation of the proposed methanation concept is limited by an appropriate heat removal.

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Steam methane reforming at low S/C ratios for power-to-gas applications

Cited by 29 publications

References 28 publications

Utilization of Bio-Syngas in Solid Oxide Fuel Cell Stacks: Effect of Hydrocarbon Reforming

Utilization of Bio-Syngas in Solid Oxide Fuel Cell Stacks: Effect of Hydrocarbon Reforming

Role of Electric Field and Surface Protonics on Low-Temperature Catalytic Dry Reforming of Methane

Simulation-Based Evaluation of a Two-Stage Small-Scale Methanation Unit for Decentralized Applications

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