scholarly journals Autonomous catalytic hydrogen generator based on bioethanol steam reforming

2021 ◽  
Keyword(s):  
Steam Reforming ◽  
Hydrogen Generator ◽  
Catalytic Hydrogen

317 Development of non-catalytic hydrogen generator from molecular ammonia

2013 ◽  
Vol 2013.23 (0) ◽  
pp. 224-226
Author(s):  
Shinji KAMBARA ◽  
Akihiro TAKEYAMA ◽  
Meguimi MASUI ◽  
Tomonori MIURA ◽  
Nobuyuki HTSHINUMA
Keyword(s):  
Hydrogen Generator ◽  
Catalytic Hydrogen

HYDROGEN PERMEABILITY OF PALLADIUM MEMBRANE FOR STEAM-REFORMING OF BIO-ETHANOL USING THE MEMBRANE REACTOR

2012 ◽  
Vol 06 ◽  
pp. 7-12 ◽  
Author(s):  
KOUJI KINOUCHI ◽  
MASAHIRO KATOH ◽  
TOSHIHIDE HORIKAWA ◽  
TAKUSHI YOSHIKAWA ◽  
MAMORU WADA
Keyword(s):  
Steam Reforming ◽  
Hydrogen Permeability ◽  
Reference Sample ◽  
Negative Influence ◽  
Palladium Membrane ◽  
Porous Stainless Steel ◽  
Pd Membrane ◽  
Plating Method ◽  
Catalytic Hydrogen

A Palladium membrane was prepared by electro-less plating method on porous stainless steel. The catalytic hydrogen production by steam-reforming of biomass-derived ethanol (bio-ethanol) using a Pd membrane was analyzed by comparing it with those for the reaction using reagent ethanol (the reference sample). And the hydrogen permeability of the palladium membrane was investigated using the same palladium membrane ( H 2/ He selectivity = 249, at ΔP = 0.10 MPa, 873 K). As a result, for bio-ethanol, deposited carbon had a negative influence on the hydrogen-permeability of the palladium membrane and hydrogen purity. The sulfur content in the bio-ethanol may have promoted carbon deposition. By using a palladium membrane, it was confirmed that H 2 yield (%) was increased. It can be attributed that methane was converted from ethanol and produced more hydrogen by steam reforming, due to the in situ removal of hydrogen from the reaction location.

Performance of 1.5 Nm3/h hydrogen generator by steam reforming of n-dodecane for naval applications

2016 ◽  
Vol 41 (42) ◽  
pp. 19475-19483 ◽  
Author(s):  
C. Fabiano ◽  
C. Italiano ◽  
A. Vita ◽  
L. Pino ◽  
M. Laganà ◽  
...  
Keyword(s):  
Steam Reforming ◽  
Hydrogen Generator

Development of a Subscale Hydrogen Generator Unit for SOFC as APU for Naval Applications

2014 ◽  
Vol 93 ◽  
pp. 1-6
Author(s):  
Vincenzo Recupero ◽  
Lidia Pino ◽  
Antonio Vita ◽  
Cristina Italiano ◽  
Concetto Fabiano ◽  
...  
Keyword(s):  
Fuel Cell ◽  
Hydrogen Production ◽  
Steam Reforming ◽  
Solid Oxide ◽  
Oxide Fuel ◽  
Hydrogen Generator ◽  
Syngas Production ◽  
Auxiliary Power ◽  
Auxiliary Power Units ◽  
Generator Unit

This paper covers the current activities at the CNR-ITAE aimed to developing a diesel steam reforming (SR) Hydrogen Generator based unit, dedicated to a Solid Oxide Fuel Cell (SOFC) in a power range until 1 kWe, to support auxiliary power units (APUs) for naval applications. The unit will is able to convert n-dodecane, as a diesel surrogate, with a nominal syngas production of 0.5 Nm3/h and a maximum hydrogen production of 1.5 Nm3/h.

Pure Hydrogen Production from Steam Reforming of Bio-Sources

2015 ◽  
Vol 2 (2) ◽  
pp. 48-56 ◽  
Author(s):  
A. Iulianelli ◽  
◽  
G. Bagnato ◽  
A. Iulianelli ◽  
A. Vita Vita ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Steam Reforming ◽  
Pure Hydrogen

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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