60results about How to "Avoid carbon formation" patented technology

A combustion burner 10A according to one embodiment of the present invention includes: a fuel nozzle 110; a burner tube 120 forming the air passage 111 between the burner tube 120 and the fuel nozzle 110; swirler vanes (swirler vanes) 130 arranged in a plurality of positions in the circumferential direction on the external circumferential surface of the fuel nozzle 110, each extending along the axial direction of the fuel nozzle 110, and gradually curving from upstream toward downstream; and a liquid fuel injecting hole 133A from which a liquid fuel is injected to a surface of each of the swirler vanes 130. The combustion burner 10A also includes multi-purpose injecting holes 11-1 to 11-3 as a cooling unit that cools a part of a vane pressure surface 132a of the swirler vane 130 on which the liquid fuel LF hits. Water is injected through the multi-purpose injecting holes 11-1 to 11-3 to form a water film 15A on the vane pressure surface 132a, whereby a combustion temperature is reduced and formation of carbon deposit is prevented.

The invention provides a method for the production of a supported nickel catalyst, in which an aqueous mixture comprising an alkali metal salt plus other metal salts is sintered to form a support material. A supported nickel catalyst comprising potassium β-alumina is also provided.

The production method of hexafluoropropylene includes the following steps: uniformly mixing raw material gas tetrafluoroethylene and octafluorocyclobutane according to a certain proportion, preheating and feeding them into stage heated tubular reactor for making cracking reaction, quenching reaction product, removing acid, drying and finally rectifying separation to obtain the invented hexafluoropylene whose purity is greater than or equal to 99.98%. Said invention adopts the octafluorocyclobutane as diluting agent and as reactant, at the same time adopts stage heated cracking process, so that it not only improves the thermal conductivity of cracking gas, but also can make the whole reaction process be implemented in optimum temp. range to inhibite the production of poor side reaction.

The invention relates to the catalyst field, particularly to a foam silicon carbide based structured catalyst and its application in preparation of butadiene by oxidative dehydrogenation of butylene. The foam silicon carbide based structured catalyst is the catalyst for preparation of butadiene by oxidative dehydrogenation of butylenes, and takes foam silicon carbide with a three-dimensional interconnected pore structure as the carrier. A ferrite catalyst with a spinel structure is loaded on the carrier surface as the main active component, and one or over two of alpha-Fe2O3, gamma-Fe2O3 and Fe3O4 are loaded on the carrier surface as the secondary active components, thus forming the structured catalyst. The structured catalyst can be processed into a plurality of complex configurations like wall flow type, parallel channel type, static hybrid type, granules and the like. The foam silicon carbide based structured catalyst provided by the invention can convert butylene into butadiene through oxidative dehydrogenation, thus reinforcing heat transfer and mass transfer, improving butadiene yield, prolonging the catalyst life, and reducing the energy consumption and material consumption of the reaction process.