A novel model for pyro-electro-catalytic hydrogen production in pure water

2019 ◽  
Vol 21 (41) ◽  
pp. 23009-23016 ◽  
Author(s):  
Julian Schlechtweg ◽  
Sascha Raufeisen ◽  
Michael Stelter ◽  
Patrick Braeutigam
Keyword(s):  
Hydrogen Production ◽  
Thermal Energy ◽  
Pure Water ◽  
Environmentally Friendly ◽  
Hydrogen Gas ◽  
Catalytic Hydrogen ◽  
Novel Model

The pyro-electro-catalytic induced generation of hydrogen gas is an environmentally friendly and sustainable way to convert excess thermal energy into a storable form.

Metal-free catalytic hydrogen production from a polymethylhydrosilane–water mixture

RSC Advances ◽  
2016 ◽  
Vol 6 (7) ◽  
pp. 5903-5906 ◽  
Author(s):  
Chew Pheng Yap ◽  
Hwa Tiong Poh ◽  
Wai Yip Fan
Keyword(s):  
Free Energy ◽  
Hydrogen Production ◽  
Hydrogen Gas ◽  
Energy Carrier ◽  
Water Mixture ◽  
Metal Free ◽  
On Demand ◽  
Formidable Challenge ◽  
Catalytic Hydrogen

Hydrogen gas is the most promising carbon-free energy carrier although its on-demand generation remains a formidable challenge.

scholarly journals Thermodynamic and Kinetic Considerations Regarding the Prospects for a Dual-Purpose Hydrogen Extraction and Separation Membrane

Energies ◽  
2021 ◽  
Vol 14 (8) ◽  
pp. 2136
Author(s):  
Karl Sohlberg
Keyword(s):  
Hydrogen Production ◽  
Hydrogen Abstraction ◽  
Hydrogen Gas ◽  
Catalytic Dehydrogenation ◽  
Dual Purpose ◽  
Physical Separation ◽  
Extraction And Separation ◽  
Separation Membrane ◽  
Hydrocarbon Sources ◽  
Critical Materials

Extraction of hydrogen from hydrocarbons is a logical intermediate-term solution for the escalating worldwide demand for hydrogen. This work explores the possibility of using a single membrane to accomplish both the catalytic dehydrogenation and physical separation of hydrogen gas as a possible way to improve the efficiency of hydrogen production from hydrocarbon sources. The present analysis shows that regions of pressure/temperature space exist for which the overall process is thermodynamically spontaneous (ΔG < 0). Each step in the process is based on known physics. The rate of hydrogen production is likely to be controlled by the barrier to hydrogen abstraction, with the density of H-binding sites also playing a role. A critical materials issue will be the strength of the oxide/metal interface.

scholarly journals Iridium Complex Catalyzed Hydrogen Production from Glucose and Various Monosaccharides

Catalysts ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 891
Author(s):  
Ken-ichi Fujita ◽  
Takayoshi Inoue ◽  
Toshiki Tanaka ◽  
Jaeyoung Jeong ◽  
Shohichi Furukawa ◽  
...  
Keyword(s):  
Hydrogen Production ◽  
Catalytic System ◽  
Catalytic Reaction ◽  
Hydrogen Gas ◽  
Water Soluble ◽  
Starting Material ◽  
Iridium Complex ◽  
Production Of Hydrogen ◽  
Bipyridine Ligand

A new catalytic system has been developed for hydrogen production from various monosaccharides, mainly glucose, as a starting material under reflux conditions in water in the presence of a water-soluble dicationic iridium complex bearing a functional bipyridine ligand. For example, the reaction of D-glucose in water under reflux for 20 h in the presence of [Cp*Ir(6,6′-dihydroxy-2,2′-bipyridine)(H2O)][OTf]2 (1.0 mol %) (Cp*: pentamethylcyclopentadienyl, OTf: trifluoromethanesulfonate) resulted in the production of hydrogen gas in 95% yield. In the present catalytic reaction, it was experimentally suggested that dehydrogenation of the alcoholic moiety at 1-position of glucose proceeded.

scholarly journals Carbons Formed in Methane Thermal and Thermocatalytic Decomposition Processes: Properties and Applications

2021 ◽  
Vol 7 (3) ◽  
pp. 50
Author(s):  
Emmi Välimäki ◽  
Lasse Yli-Varo ◽  
Henrik Romar ◽  
Ulla Lassi
Keyword(s):  
Thermal Decomposition ◽  
Hydrogen Production ◽  
Energy Systems ◽  
Hydrogen Gas ◽  
Solid Carbon ◽  
Hydrogen Economy ◽  
Decomposition Processes ◽  
Different Types ◽  
Decomposition Of Methane ◽  
Thermocatalytic Decomposition

The hydrogen economy will play a key role in future energy systems. Several thermal and catalytic methods for hydrogen production have been presented. In this review, methane thermocatalytic and thermal decomposition into hydrogen gas and solid carbon are considered. These processes, known as the thermal decomposition of methane (TDM) and thermocatalytic decomposition (TCD) of methane, respectively, appear to have the greatest potential for hydrogen production. In particular, the focus is on the different types and properties of carbons formed during the decomposition processes. The applications for carbons are also investigated.

scholarly journals Analysis on Characteristic of Hydrogen Gas Dispersion and Evaluation Method of Blast Overpressure in VHTR Hydrogen Production System

2006 ◽  
Vol 5 (4) ◽  
pp. 316-324 ◽  
Author(s):  
Tomoyuki MURAKAMI ◽  
Atsuhiko TERADA ◽  
Tetsuo NISHIHARA ◽  
Yoshiyuki INAGAKI ◽  
Kazuhiko KUNITOMI
Keyword(s):  
Hydrogen Production ◽  
Production System ◽  
Evaluation Method ◽  
Hydrogen Gas ◽  
Gas Dispersion ◽  
Blast Overpressure

Ni/SiO 2 core–shell catalysts for catalytic hydrogen production from waste plastics-derived syngas

2017 ◽  
Vol 42 (16) ◽  
pp. 11239-11251 ◽  
Author(s):  
Ren-Xuan Yang ◽  
Li-Ru Xu ◽  
Shan-Luo Wu ◽  
Kui-Hao Chuang ◽  
Ming-Yen Wey
Keyword(s):  
Hydrogen Production ◽  
Core Shell ◽  
Waste Plastics ◽  
Catalytic Hydrogen

Hydrogen Isotope Fractionation in Aqueous Alkaline Earth Chloride Solutions

2007 ◽  
Vol 62 (12) ◽  
pp. 721-728 ◽  
Author(s):  
Masahisa Kakiuchi
Keyword(s):  
Isotope Effect ◽  
Hydrogen Isotope ◽  
Alkaline Earth ◽  
Platinum Catalyst ◽  
Pure Water ◽  
Pressure Ratio ◽  
Hydrogen Gas ◽  
Chloride Solutions ◽  
Aqueous Chloride ◽  
Hydrogen Isotope Effect

The D/H ratio of hydrogen gas in equilibrium with aqueous alkaline earth (Mg, Ca, Sr or Ba) chloride solutions measured at 25◦C using a hydrophobic platinum catalyst, was found to be higher than the D/H ratio equilibrated with the applied pure water. The hydrogen isotope effect between such solutions and pure water changes with the molality of the solutions. The order of the D/H ratios in alkaline earth chlorides is found to be BaCl2 > SrCl2 ≥ CaCl2 ≥ MgCl2. The hydrogen isotope effect in the aqueous chloride solutions of Mg, Ca, Sr or Ba ions is significantly larger than that in the aqueous chloride solutions of Li, Na, K or Cs ions. For MgCl2 and CaCl2 solutions, the hydrogen isotope effect is opposite to the oxygen isotope effect. The results are compared with the free energy change of transfer from H2O to D2O, and are discussed for the vapour pressure ratio of H2O and D2O of CaCl2 solutions.

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