摘要:
Provided are a carbon catalyst for hydrogen production having an excellent catalytic activity, a production method therefor, and a method of producing hydrogen using the catalyst. The carbon catalyst for hydrogen production is a carbon catalyst, which is obtained by carbonizing a raw material including an organic substance and a transition metal, the catalyst being used for hydrogen production by thermal decomposition of a hydrocarbon compound and/or an oxygen-containing organic compound. Further, the carbon catalyst for hydrogen production may be obtained by loading an alkaline earth metal on a carbonized material produced by the carbonization.
摘要:
The invention provides a catalyst for the production of hydrogen by steam reforming. The catalyst is a porous catalyst which is based on at least aluminum oxide and preferably magnesium oxide, and further comprises boron and nickel. The porous catalyst comprises pores having an average pore size in the range of 0.1-50 nm. The activity of the catalyst may be further enhanced by addition of a noble metal such as Rh, Ru, Pd, Ir or Pt. The catalyst can be broadly used in hydrogen production processes, and is especially suitable for reforming using a membrane which is selective for a predetermined reaction product. Such process can be operated at relatively low temperatures of about 450-700° C.
摘要:
Disclosed are a semiconductor photocatalyst for the photocatalytic reforming of biomass derivatives for hydrogen generation, and preparation and use thereof. The semiconductor photocatalyst has the atomic composition ratio of M-N-Ax; wherein M-N are IIB group elements to VIA group elements, or IIIA group elements to VA group elements, A being one element or more than two elements selected from the group consisting of cobalt, nickel, iron, copper, chromium, palladium, platinum, ruthenium, rhodium, iridium and silver; and 0.02% ≤ x ≤ 1.0%. The method of in-situ preparation of the highly effective semiconductor photocatalyst and catalytically reforming biomass derivatives for hydrogen generation by driving photoreaction with visible light via quantum dots is simple, fast, highly effective, inexpensive and practical. The in situ reaction can occur in sunlight without the need of harsh conditions such as calcination.
摘要:
A process for the production of syngas and hydrogen starting from liquid hydrocarbons, gaseous hydrocarbons and/or oxygenated compounds, also deriving from biomasses, and mixtures thereof, envisages recourse to a membrane reactor in an architecture that uses a succession of reaction and separation stages. Said process comprises a section for pre-heating the reagents, a number of sections for short -contact -time catalytic partial oxidation for producing syngas and hydrogen in a number of stages followed by a separation of hydrogen produced by means of membranes, a thermal -recovery section, a section.for removal of the carbon dioxide produced, and a section for cooling and removal of the condensate. Possibly, said process comprises a section for purification of hydrogen obtained by means of pressure -swing adsorption (PSA) and generation of purge gas with medium calorific value. Furthermore, said process comprises a section for hydrodesulphuration of the reagents and could comprise a section for conversion of the CO 2 and H 2 produced by means of a reverse-water-gas-shift (RWGS) reaction.
摘要:
A reactor 1A includes a reaction vessel 10 having an inlet 4 for to-be-reformed gas 2 and an outlet 8 for reformed gas 6, a pair of electrodes 12 for plasma generation, disposed in the internal space of the reactor vessel 10 so as to face each other, a power source 14 for applying a voltage to the pair of electrodes 12, and a catalyst for promoting the reforming reaction of to-be-reformed gas 2, wherein one of the pair of electrodes 12 is a linear electrode 32, the other of the pair of electrodes 12 is a honeycomb electrode 34A made of a conductive ceramics, the catalyst is loaded on the partition walls of the honeycomb electrode 34A, and the ratio of the maximum outer diameter d 1 of each cell-opening end face of the honeycomb electrode 34A to the length L 1 of the honeycomb electrode 34A in the cell-extending direction is in a range of 0.50 to 1.2.
摘要:
In a method for producing water gas, a reaction fluid containing polyhydric alcohol and water is caused to flow in a reaction zone (14a) provided with a catalyst (18) having a surface extending in a flow direction of the reaction fluid, at an average flow velocity of 0.05 m/s or more in a reaction time of 1.0 second or more.
摘要:
A hydrogen generation apparatus (100) according to the present invention includes: a hydrogen generator (1) configured to generate a fuel gas through a reforming reaction by using a raw fuel; a combustor (2) configured to heat the hydrogen generator (1); an on-off valve (8A) configured to open/block a gas passage (8) through which the gas that is sent out from the hydrogen generator (1) is supplied to the combustor (2); a combustion air supply device (4) configured to supply combustion air to the combustor (2); an ignition device (5) provided at the combustor (2); and a controller (30). In a case where flame extinction has occurred at the combustor (2) during generation of a hydrogen-containing gas in a start-up process, the controller (30) performs an ignition operation of the ignition device (5) with the on-off valve (8A) kept opened.