Hierarchical Multiscale Modeling of Methane Steam Reforming Reactions

2011 ◽  
Vol 50 (5) ◽  
pp. 2600-2612 ◽  
Author(s):  
De Chen ◽  
Rune Lødeng ◽  
Hallvard Svendsen ◽  
Anders Holmen
Keyword(s):  
Multiscale Modeling ◽  
Steam Reforming ◽  
Methane Steam Reforming ◽  
Methane Steam ◽  
Hierarchical Multiscale ◽  
Reforming Reactions

Syngas production from methane steam reforming and dry reforming reactions over sintering-resistant Ni@SiO2 catalyst

2019 ◽  
Vol 46 (3) ◽  
pp. 1735-1748 ◽  
Author(s):  
Bolin Han ◽  
Fagen Wang ◽  
Linjia Zhang ◽  
Yan Wang ◽  
Weiqiang Fan ◽  
...  
Keyword(s):  
Steam Reforming ◽  
Dry Reforming ◽  
Methane Steam Reforming ◽  
Syngas Production ◽  
Methane Steam ◽  
Reforming Reactions

scholarly journals Peculiarities of hydrogen production using methane steam reforming in a microstructured reactor-heat exchanger

2021 ◽  
Vol 2119 (1) ◽  
pp. 012037
Author(s):  
V V Kuznetsov ◽  
O A Gasenko
Keyword(s):  
Heat Exchanger ◽  
Steam Reforming ◽  
Numerical Study ◽  
Methane Steam Reforming ◽  
Catalyst Synthesis ◽  
Methane Steam ◽  
Microstructured Reactor ◽  
Methane Reactions ◽  
Kinetics Of ◽  
Reforming Reactions

Abstract This paper presents the description of the rhodium catalyst synthesis and the results of numerical study of the methane-steam reforming in a microstructured reactor-heat exchanger. The kinetics of the reforming reactions on a synthesized catalyst was determined using the numerical simulations and experimental data on activation energy of the methane reactions. It allows finding the characteristics of methane steam reforming that can be used for optimization of the microstructured reactor implementing the microchannel technology.

Elevated-temperature H2 separation using a dense electron and proton mixed conducting polybenzimidazole-based membrane with 2D sulfonated graphene

2021 ◽  
Author(s):  
Yun Jin ◽  
Bo Gao ◽  
Chao Bian ◽  
Xiuxia Meng ◽  
Bo Meng ◽  
...  
Keyword(s):  
High Temperature ◽  
Elevated Temperature ◽  
Steam Reforming ◽  
Cost Effective ◽  
Clean Energy ◽  
Methane Steam Reforming ◽  
Effective Separation ◽  
Methane Steam ◽  
Sulfonated Graphene ◽  
Reforming Reactions

Hydrogen (H2) is a clean energy carrier and its cost-effective separation is important for future H2 energy deployment. Currently, H2 is mainly produced from high temperature methane steam reforming reactions...

scholarly journals Rhodium-Catalyzed Methanation and Methane Steam Reforming Reactions on Rhodium-Perovskite Systems: Metal-Support Interaction

ChemCatChem ◽  
2016 ◽  
Vol 8 (12) ◽  
pp. 2057-2067 ◽  
Author(s):  
Ramona Thalinger ◽  
Thomas Götsch ◽  
Chen Zhuo ◽  
Walid Hetaba ◽  
Wolfgang Wallisch ◽  
...  
Keyword(s):  
Steam Reforming ◽  
Methane Steam Reforming ◽  
Support Interaction ◽  
Methane Steam ◽  
Metal Support Interaction ◽  
Metal Support ◽  
Reforming Reactions

Co/Mg/Al hydrotalcite-type precursor, promoted with La and Ce, studied by XPS and applied to methane steam reforming reactions

2009 ◽  
Vol 255 (11) ◽  
pp. 5851-5856 ◽  
Author(s):  
Alessandra Fonseca Lucrédio ◽  
Germano Tremiliosi Filho ◽  
Elisabete Moreira Assaf
Keyword(s):  
Steam Reforming ◽  
Methane Steam Reforming ◽  
Methane Steam ◽  
Reforming Reactions

Ultra-Low Amounts of Palladium (0.005-0.05 Wt% Pd) Supported on Titania: Remarkable Low-Temperature Activity for NO Reduction with CO and Structure-Function Property Relationships in Methane Oxidation

2020 ◽  
Author(s):  
Konstantin Khivantsev ◽  
Libor Kovarik ◽  
Nicholas R. Jaegers ◽  
János Szanyi ◽  
Yong Wang
Keyword(s):  
Nitric Oxide ◽  
Carbon Monoxide ◽  
Methane Oxidation ◽  
Steam Reforming ◽  
Methane Steam Reforming ◽  
Oxide Reduction ◽  
Water Steam ◽  
Methane Steam ◽  
Anatase Titania ◽  
Nitric Oxide Reduction

<p>Atomically dispersed Pd +2 cations with ultra-dilute loading of palladium (0.005-0.05 wt%) were anchored on anatase titania and characterized with FTIR, microscopy and catalytic tests. CO infrared adsorption produces a sharp, narrow mono-carbonyl Pd(II)-CO band at ~2,130 cm<sup>-1</sup> indicating formation of highly uniform and stable Pd+2 ions on anatase titania. The 0.05 wt% Pd/TiO<sub>2</sub> sample was evaluated for methane combustion under dry and wet (industrially relevant) conditions in the presence and absence of carbon monoxide. Notably, we find the isolated palladium atoms respond dynamically upon oxygen concentration modulation (switching-on and switching off). When oxygen is removed from the wet methane stream, palladium ions are reduced to metallic state by methane and catalyze methane steam reforming instead of complete methane oxidation. Re-admission of oxygen restores Pd<sup>+2</sup> cations and switches off methane steam reforming activity. Moreover, 0.05 wt% Pd/TiO<sub>2</sub> is a competent CO oxidation catalyst in the presence of water steam with 90% CO conversion and TOF ~ 4,000 hr<sup>-1</sup> at 260 ⁰C. </p><p>More importantly, we find that diluting 0.05 wt% Pd/titania sample with titania to ultra-low 0.005 wt% palladium loading produces a remarkably active material for nitric oxide reduction with carbon monoxide under industrially relevant conditions with >90% conversion of nitric oxide at 180 ⁰C (~460 ppm NO and 150 L/g*hr flow rate in the presence of >2% water steam) and TOF ~6,000 hr<sup>-1</sup>. Pd thus outperforms state-of-the-art rhodium containing catalysts with (15-20 times higher rhodium loading; rhodium is ~ 3 times more expensive than palladium). Furthermore, palladium catalysts are more selective towards nitrogen and produce significantly less ammonia relative to the more traditional rhodium catalysts due to lower Pd amount nd lower water-gas-shift activity. Our study is the first example of utilizing ultra-low (0.05 wt% and less) noble metal (Pd) amounts to produce heterogeneous catalysts with extraordinary activity for nitric oxide reduction. This opens up a pathway to study other Pd, Pt and Rh containing materials with ultra-low loadings of expensive noble metals dispersed on titania or titania-coated oxides for industrially relevant nitric oxide abatement.</p>

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