PULSE-DETONATION METHOD FOR PRODUCING ALKENES AND ALKINES AND A DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2021 - IPC B01J19/00 B01J3/08 

FIELD: industrial chemistry.

SUBSTANCE: invention relates to methods and devices for producing alkenes and alkynes, for example, ethylene and acetylene, from available gaseous feedstocks, for example, methane, ethane, propane and other saturated hydrocarbons. A method is proposed for converting a gaseous feedstock into alkenes and alkynes, in which a gaseous feedstock is fed into a flow-through pulse-detonation tube with simultaneous or subsequent supply of a fuel and an oxidizer at the same time, filling a flow-through pulse-detonation tube and a flow-through reactor, partially or completely, with a gaseous feedstock, fuel and oxidizer; cyclic initiation of detonation combustion to ensure heating of the gaseous feedstock to the pyrolysis temperature in a flow-through pulse-detonation tube as a result of its compression in a traveling detonation wave, where the gaseous feedstock subjected to compression and heating in a traveling detonation wave is diluted with fuel and an oxidizer and in a flow reactor by compressing the gaseous feedstock in the traveling shock wave, where the gaseous feedstock being compressed and heated in the traveling shock wave is not diluted with fuel and oxidizer, or in the traveling detonational wave, where the gaseous feedstock, subjected to compression and heating in a traveling detonation wave, is diluted with a fuel and an oxidizer. The proposed method is implemented in a device that includes a combustion chamber, a flow reactor, a cooling system, a fuel and oxidizer supply system, an ignition system and a gaseous feedstock supply system, in which the combustion chamber is made in the form of a flow-through pulse-detonation tube with a cooling system including sequentially located a mixing and ignition chamber containing collectors for supplying fuel, oxidizer and gaseous feedstock, a flame accelerator that ensures the transition of combustion to detonation, and a smooth pipe with a flow reactor installed in its outlet section.

EFFECT: provision of a method and device for producing alkynes (acetylene) and alkenes (ethylene) from available gaseous feedstock (for example, methane and propane).

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