10 results about "Acetylene hydrogenation" patented technology

The application provides a MgAlCe-LDH supported Pd-CeO2 composite catalyst, a preparation method thereof and an acetylene hydrogenation method. The composite catalyst comprises a core component, a promoter and a carrier; the core component is loaded on the carrier, and the promoter is grown on the surface of the carrier; the core component is Pd, the promoter is CeO2, and the carrier is a MgAlCe-LDH carrier; in the carrier, the doping mole percentage of Ce is 2.5-10.0 mol%; the loading amount of Pd is 0.06-0.20 wt% and the loading amount of CeO2 is 0.8-4.0 wt% based on 100 wt% of the total mass of the dry base of the composite catalyst. The application further provides a preparation method of the above catalyst and an acetylene hydrogenation method based on the catalyst. The catalyst can catalytically reduce acetylene to generate ethylene with high conversion rate and high selectivity.

This invention discloses a control method, electronic equipment, storage medium, and a method for acetylene hydrogenation to ethylene production from a three-stage C2 hydrogenation reactor. The control method includes: controlling the inlet temperature of the first-stage C2 hydrogenation reactor based on the volume fraction of the product emanating from the first-stage reactor; controlling the inlet temperature of the second-stage C2 hydrogenation reactor based on the volume fraction of the product emanating from the second-stage reactor; and controlling the inlet temperature of the third-stage C2 hydrogenation reactor based on the volume fraction of the product emanating from the third-stage reactor. This invention solves the problem of ethylene loss due to over-hydrogenation in three-stage pre-hydrogenation C2 hydrogenation reactors, increasing the stability of ethylene production, lowering the reaction temperature compared to traditional methods, reducing the risk of temperature runaway, improving the selectivity and operational stability of the C2 hydrogenation reactor, and simultaneously reducing steam consumption by lowering the reaction temperature.

Improved photocatalysis is provided for chemical reactions involving hydrogen in two component plasmon-catalyst nanoparticles. The main idea of this work is to configure the optical illumination of the nano-articles to suppress formation of an undesirable hydride phase in the nanoparticles. This idea is broadly applicable to any chemical reaction involving hydrogen. Specific examples considered experimentally in this work are acetylene hydrogenation to produce ethylene, carbon dioxide reduction and ammonia synthesis.

The application provides a PDA modified MgAl-LDH supported Pd-based catalyst, a preparation method thereof and an acetylene hydrogenation method. The preparation method comprises the following steps: mixing a MgAl-LDH dispersion liquid and a first modifier solution to obtain a modified carrier; mixing and reacting the modified carrier solution and a Pd precursor solution, and performing centrifugal separation and drying to obtain the PDA modified MgAl-LDH supported Pd-based catalyst; and the first modifier is selected from dopamine hydrochloride. The application also provides the PDA modified MgAl-LDH supported Pd-based catalyst prepared by the above method and an acetylene hydrogenation method based on the catalyst. The PDA modified MgAl-LDH supported Pd-based material is used as the catalyst in the application, the modified carrier significantly enhances the interaction between the active component and the carrier, and the catalyst performance is obviously improved.

The application relates to the field of hydrogenation catalysts, and discloses a silicon carrier, a preparation method of the silicon carrier, an acetylene hydrogenation catalyst and a preparation method of the acetylene hydrogenation catalyst. The preparation method of the silicon carrier comprises the following steps: 1) mixing and stirring a first silicon ester, a second silicon ester and hydrochloric acid in the presence of water until a gelatinous product is obtained; and 2) aging the gelatinous product obtained in the step 1), wherein the first silicon ester is selected from one or more of the following: aminoethylaminopropyltriethoxysilane, aminomethylaminopropyltriethoxysilane, aminoethylaminomethyltriethoxysilane and aminoethylaminopropyltrimethoxysilane. The carrier does not need to be calcined in the preparation process, the preparation method is simple and easy to implement, the acetylene hydrogenation catalyst prepared from the carrier can realize complete conversion of acetylene at a lower temperature, and the acetylene hydrogenation catalyst has excellent acetylene selectivity.

A system for producing hydrogen is disclosed which comprises an acetylene hydrogenation unit configured to receive a compressed cracked gas and produce a purified, compressed cracked gas; a chilling t

This invention discloses a CuO catalyst supported on a composite Hf-containing support material, its preparation, and its application in the hydrogenation reaction of acetylene. The preparation method of the CuO catalyst supported on the composite Hf-containing support material includes the following steps: preparing a composite Hf-containing support material; loading Cu(OH)₂ onto the composite Hf-containing support material using a wet impregnation process; and then calcining under air atmosphere to obtain the CuO catalyst supported on the composite Hf-containing support material. This invention provides the application of the CuO catalyst supported on the composite Hf-containing support material in the selective hydrogenation reaction of acetylene, exhibiting good stability and high activity.

The invention discloses an acetylene circulating solution catalytic hydrogenation process which mainly comprises the following steps: heating an acetylene circulating solution to a reaction temperature, carrying out two-stage hydrogenation reaction, completely hydrogenating higher alkyne such as butadiyne in a solvent into alkane, carrying out flash evaporation removal on the alkane, and sending the alkane to an acetylene cracking unit by a blower to serve as a cracking reaction raw material, the hydrogenated solvent is subjected to steam stripping dehydration through acetylene-rich gas from a vacuum degassing tower and then is sent to a pre-absorption tower circulation and solvent regeneration unit, and acetylene is recovered before steam stripping gas is sent to a cracking gas compressor. According to the catalyst and the technical scheme adopted by the invention, 99% of higher alkyne in an acetylene circulating solution is removed, and the problem of blockage of the higher alkyne in an acetylene device is solved; high-grade acetylene hydrogenation products and acetylene-rich gas are recycled, so that the acetylene yield of the device is improved, and the acetylene loss is reduced.

The invention provides a method for preparing ethylene through acetylene hydrogenation. The method comprises the following steps: acetylene is subjected to selective hydrogenation by using a supported transition metal phosphide as a catalyst to obtain ethylene, and the supported transition metal phosphide comprises a carrier and a transition metal phosphide supported on the carrier. The transition metal phosphide catalyst which is uniform in active component particle, concentrated in size distribution and simple in preparation process is applied to a reaction for preparing ethylene through acetylene hydrogenation, and has high acetylene conversion activity, high ethylene selectivity and relatively good repeated use stability.

The application provides a MgAl-LDH supported PdAg bimetallic catalyst, a preparation method of the catalyst and an acetylene hydrogenation method. The MgAl-LDH supported PdAg bimetallic catalyst contains, with the total dry base mass of the MgAl-LDH supported PdAg bimetallic catalyst being 100 wt%, 0.02-0.08% of a core component, 0.09-0.3% of an auxiliary agent and 99.50-99.95% of a carrier; the core component and the auxiliary agent are loaded on the carrier; the carrier is a magnesium-aluminum hydrotalcite, the core component is Pd, and the auxiliary agent is Ag. The application further provides a preparation method of the catalyst and an acetylene hydrogenation method based on the catalyst. The catalyst can catalytically reduce acetylene to ethylene with high conversion rate and high selectivity.