35results about How to "High hydrogen selectivity" patented technology

The invention relates to a low-carbon hydrocarbon hydrogen production device, in particular to a hydrogen production device through reforming methane by using collaborative drive rotation sliding arc discharge plasma. The device comprises a reactor with a reaction hood and an insulated base. The electrode of the reactor is arranged on the insulated base and is connected with a high-voltage DC power supply. A reactor outlet is arranged on the reaction hood. One end of a mixed gas pipeline is connected with a gas inlet on the external side of the insulated base and the other end of the mixed gas pipeline is connected with an air pump and a methane gas source. The electrode comprises a conical internal electrode and a tubular external electrode, wherein the internal electrode is arranged in the center of the insulated base and the external electrode is arranged around the internal electrode. A spiral gas flow passage is arranged in the insulated base. The invention has the advantages that the effect of hydrogen production through methane reformation can be greatly improved, the methane conversion rate is higher, the hydrogen selectivity is higher, the energy consumption is lower and the methane treatment capacity is larger; and the device is simple, the cost is low and the device is particularly suitable for medium and small scale hydrogen production through methane reformation.

Disclosed herein is a catalyst for aqueous-phase reforming of biomass-derived polyols, which comprises platinum and copper as active metals and a mixture of magnesia and alumina as a support. The catalyst contains a small amount of platinum and, at the same time, has high hydrogen selectivity and low methane selectivity.

The invention discloses a method for preparing a Ni / ZrO2 catalyst. The method comprises the following steps: (1) preparing zirconium salt microemulsion, nickel salt microemulsion and alkaline microemulsion respectively; salt microemulsion, nickel salt microemulsion and alkaline microemulsion are mixed; (3) the system obtained by mixing step (2) is subjected to solid-liquid separation to obtain a solid product, and the solid product is cleaned, dried and roasted to obtain Ni / ZrO2 catalyst. The invention also provides the Ni / ZrO2 catalyst prepared by the method and a method for preparing synthesis gas by autothermal reforming of methane. The preparation method of the Ni / ZrO2 catalyst of the invention has simple process, easy operation and low cost, and the prepared catalyst has excellent catalytic activity and stability in the reaction of methane autothermal reforming to prepare synthesis gas.

The invention relates to the application of a nickel-based skeleton metal catalyst in the preparation of hydrogen by decomposing hydrazine. Specifically, nickel-containing framework metals are used as catalysts to rapidly decompose hydrazine or hydrazine aqueous solutions of different concentrations to obtain hydrogen and nitrogen under the condition of 0-100°C basic additives, and the selectivity of hydrogen exceeds 99%. The catalyst raw material of the invention is easy to obtain, the preparation process is simple, and the invention has the advantages of high hydrogen production efficiency, few by-products, easy recovery of the catalyst, low cost and the like, and has potential application prospects.