41 results about "Methane decomposition" patented technology

A method for producing a hydrogen enriched fuel includes the steps of providing a flow of methane gas, and providing a catalyst. The method also includes the steps of heating the catalyst instead of the reactor walls and the methane gas using microwave irradiation at a selected microwave power, directing the flow of methane gas over the catalyst, and controlling the microwave power to produce a product gas having a selected composition. A system for producing a hydrogen enriched fuel includes a methane gas source, a reactor containing a catalyst, and a microwave power source configured to heat the catalyst.

A method for producing a hydrogen enriched fuel and carbon nanotubes includes the steps of providing a flow of methane gas, and providing a catalyst mixture comprising a Fe based catalyst and carbon. The method also includes the steps of pretreating the catalyst mixture using microwave irradiation and exposure to CH4, heating the catalyst mixture and the methane gas using microwave irradiation at a selected microwave power, directing the flow of methane gas over the catalyst mixture, and controlling the microwave power to produce a product gas having a selected composition and the carbon nanotubes. For producing multi walled carbon nanotubes (MWNTs) only a flow of methane gas into the reactor is required. For producing single walled carbon nanotubes (SWNTs), a combination of hydrogen gas and methane gas into the reactor is required.

The invention discloses a method for coproduction of carbon black and high-purity hydrogen by high-temperature pyrolysis of methane, which comprises the following steps: taking fuel gas with low caloric value of 1300-1500kcal / Nm3 as a fuel, taking methane-containing gas as a raw material, adopting the alternate working mode of controlling the quantity of supplied oxygen used for combustion-supporting for further promoting the full combustion of the fuel gas with the low caloric value, storing heat in a reaction furnace, removing the residual gas and carrying out methane pyrolysis, and building a methane non-oxygen high-temperature pyrolysis reaction environment, and the method specifically comprises the process steps of regulating the combustion-supporting gas, storing the heat in the reaction furnace, removing the residual gas, carrying out the methane pyrolysis, collecting the carbon black, and purifying for producing the hydrogen. The process is simple, and the amplification of production capacity and the continuous high-efficient production can be realized through the multi-stage combination of the pyrolysis reaction furnaces. The method can not only fully utilize the low-caloric value fuel gas resources and realize high reaction efficiency, but also reduce the emission of greenhouse gas and realize the low-carbon clean circulatory production, and a set of production process can realize the coproduction of the high-quality carbon black and the high-purity hydrogen.

The invention belongs to the technical field of methane conversion, in particular to a methane oxidative coupling method based on the chemical chain lattice oxygen transfer technology, which uses a composite material with methane catalytic cracking and selective oxygen supply functions to realize one-step efficient methane oxidative coupling The catalytic oxygen supply material is composed of a methane cracking catalyst and a selective oxygen supply material. The catalytic part provides active sites for the activated cracking of methane, and the oxygen supply material part transmits oxygen atoms through lattice oxygen to supply oxygen for the reaction. Oxidation and regeneration of free oxygen; Catalytic oxygen carrier oxidation-reduction cycle realizes the transfer of oxygen in this reaction, avoiding the direct contact between free oxygen and methane; Directional control of lattice oxygen activity weakens the excessive oxidation of methane and improves the oxidation of olefins. Selectivity and yield of olefins; at 800°C to 850°C, methane oxidative coupling has higher reactivity and selectivity.

The invention discloses a bubbling type methane decomposition reaction device for high-temperature particle heating. The device is mainly applied to an ultra-high temperature condensation solar system. A plurality of special bubbling type direct methane decomposition reactor units are arranged in a main body part (a heat-carrying particle heat release tank) of the device; high-temperature heat-carrying particles downwards flow through the reactor units from the top of the heat release tank and transfer heat to heat-carrying fluid in the reactor units; methane bubbles are decomposed to producehydrogen and carbon nano-particles in the heat-carrying fluid; the carbon nano-particles and reactive gases are separated in the reactor units and extracted by an induced draft fan; and after discharged from the reactor units, the reacted mixed gases (the hydrogen and unreacted methane gas) are cooled to be fed into the next-stage reactor units to be continuously reacted or fed out of the device to enter a hydrogen separation system. According to the device disclosed by the invention, the heat-carrying fluid does not need to be fed out of the device to be heated, and safe and stable operationsof the system are ensured; and due to the modular design of the reactor units, the zoom design of the device is conveniently realized.