215 results about "Carbon dioxide reforming" patented technology

The present invention relates to a novel composite metal oxide catalyst, a method of making the catalyst, and a process for producing synthesis gas using the catalyst. The catalyst may be a nickel and cobalt based dual-active component composite metal oxide catalyst. The catalyst may be used to produce synthesis gas by the carbon dioxide reforming reaction of methane. The catalyst on an anhydrous basis after calcinations has the empirical formula:

M^m+ and Nⁿ⁺ are two transition metals serving as dual-active components and selected from the group consisting of Ni, Co, Fe, Mn, Mo, Cu, Zn or mixtures thereof, a+b+c+d=1, and 0.001≦a≦0.8, 0.001≦b≦0.8, 0.1≦c≦0.99, 0.01≦d≦0.99.

The invention relates to a method for preparing a catalyst for preparing synthesis gas by reforming methane and carbon dioxide, which comprises the following steps: soaking a carrier into a mixed solution of cerium(III) nitrate and lanthanum nitrate, and drying and roasting the soaked carrier for 2 to 10 hours to obtain a modified carrier (A); soaking the (A) into a soluble nickel salt solution orsoaking the (A) into a chloroplatinic acid solution, and drying and roasting the soaked carrier to obtain (B) or (C); soaking the (B) into the chloroplatinic acid solution or soaking the (C) into thesoluble nickel salt solution, and drying and roasting the soaked carrier to obtain a catalyst precursor, or soaking the modified carrier into a mixed solution of the soluble nickel salt solution andthe chloroplatinic acid, and drying and roasting the soaked carrier to obtain a catalyst precursor; and reducing the precursor in hydrogen and nitrogen mixed gas to obtain the catalyst. The catalyst has the advantages of low cost, good catalytic activity under the reaction condition of large space velocity, high selectivity for H2 and CO, and good sintering resistance and carbon deposition resistance.

The invention discloses a methane-carbon dioxide reforming reactive catalyst and a preparation method thereof. The methane-carbon dioxide reforming reactive catalyst is a nanometer composite oxide with a mesoporous structure, formed by taking a carrier metal oxide as a substrate and taking another auxiliary metal oxide and an active metal oxide as disperse phases. The catalyst has the advantages of strong catalytic activity, high stability and good anti-carbon performance.

A synthetic gas containing hydrogen and carbon monoxide is efficiently obtained by reacting a hydrocarbon feedstock gas with carbon dioxide under pressure, while suppressing carbon deposition. The pressure is preferably 3 atmospheres (0.304 MPa), and used is a carbon dioxide reforming catalyst that contains at least one alkaline earth metal carbonate a catalytic metal promoting the decomposition reaction of a hydrocarbon feedstock gas, at least one alkaline earth metal selected from the group consisting of Ca, Sr, and Ba, and a complex oxide containing at least one component selected from the group consisting of Ti, Al, Zr, Fe, W, and Mo, such as ATiO₃, AAl₂O₄, AZrO₃, AFe₂O₄, A₃W₂O₉, A₂WO₅, or AMoO₄, where A is at least one of Ca, Sr, and Ba.

The invention belongs to a catalyst preparation technology field of reforming methane with carbon dioxide to produce synthesis gas, and particularly discloses a preparation method and application of MgO (111) load nickel-base catalyst. The catalyst is synthesized by a step of carrier synthesis and a step of Ni/MgO (111) preparation. The carrier is prepared by dissolving magnesium ribbon into a absolute methanol, adding anisyl alcohol and stirring, adding a water methanol solution dropwise under stirring, putting the hydrolyzed mixture into a high pressure reactor, leading argon into the reactor to replace the atmosphere, and then pressurizing to 1.0 MPa, reacting at the temperature of 265 DEG C, cooling and putting the obtained product into a tubular furnace, and calcinating the product; and the Ni/MgO (111) is prepared by immersing the carrier in an acetylacetone nickel solution uniformly, and calcinating for 5 h at the temperature of 650 DEG C after drying. The results of using the catalyst for catalyzing the reforming reaction of methane and carbon dioxide show that the catalyst has good activity and stability and enables the conversion rate of both CH4 and CO2 to be over 85%, and that the catalyst activity can stably maintain for 200 h without obvious inactivation.

Disclosed is a supported nanoparticle catalyst, methods of making the supported nanoparticle 5 catalysts and uses thereof. The supported nanoparticle catalyst includes catalytic metals M1, M2, M3, and a support material. M1 and M2 are different and are each selected from nickel (Ni), cobalt (Co), manganese (Mn), iron (Fe), copper (Cu) or zinc (Zn), wherein M1 and M2 are dispersed in the support material. M3 is a noble metal deposited on the surface of the nanoparticle catalyst and/or dispersed in the support material. The nanoparticle catalyst is 10 capable of producing hydrogen (H2) and carbon monoxide (CO) from methane (CH4) and carbon dioxide (CO2).

The invention relates to a catalyst for producing synthesis gas by reforming natural gas and carbon dioxide and a preparation method thereof, belonging to the fields of petrochemical engineering, natural gas chemical engineering and catalysts. The catalyst takes aluminum oxide as a carrier, takes nickel as an active ingredient and takes a rare earth metal oxide as an assistant, wherein the content by weight of an active ingredient, namely NiO is 4.0-12.0%, and the content by weight of an assistant, namely La2O3 is 0.5-6.0%. The preparation method comprises the following steps: firstly preparing the aluminum oxide carrier, and then loading the active ingredient and the assistant on the carrier, wherein the preparation of the aluminum oxide carrier is as follows: mixing an aluminum raw material, a binding agent and a pore-forming agent, forming, drying and then performing calcination, and the active ingredient and the assistant are loaded on the carrier in an impregnation way; and further drying and calcining to prepare the catalyst. As for the catalyst, the surface of the aluminum oxide carrier is modified by the rare earth metal oxide, thereby reducing the acidity of the surface of the carrier, reducing the carbon deposition trend of methane-carbon dioxide reaction, improving the anti-carbon deposition performance, improving the dispersivity of the active ingredient, reducing the generation of carbon, improving the stability of the catalyst, prolonging the life cycle of the catalyst and realizing the low cost.

The invention discloses a preparation method of a catalyst for carbon dioxide reforming of methane to produce synthesis gas. The preparation method comprises the following steps: mixing lignite active carbon with ammonia water according to a proportion and performing closed immersion to obtain modified lignite active carbon; placing the modified lignite active carbon in a closed pressurized temperature control reaction kettle; performing hydrothermal reaction at certain temperature and under certain voltage; naturally cooling and drying to prepare ammonia water modified lignite active carbon; finally performing ultrasonic immersion treatment on the ammonia water modified lignite active carbon and cobalt nitrate solution under certain pressure and drying and baking to prepare the catalyst. The catalyst prepared by the method has the advantages of readily available raw materials, good catalytic activity, long life and easiness in industrial production.

The invention discloses a catalyst for preparing synthetic gas by reforming of methane and carbon dioxide as well as a preparation method and application of the catalyst, and belongs to the technical field of preparing catalysts. The catalyst is characterized in that activated charcoal is adopted as a carrier, multi-metal matters of cobalt, zirconium and molybdenum are adopted as active matters, wherein the content of the activated charcoal is 80-89%; the content of the multi-metal matters of cobalt, zirconium and molybdenum is 11-20%. Raw materials preparing the activated charcoal are broad in source, low in price and easy to obtain; the prepared activated charcoal has good pore structures and large specific surface area and strong sticking function to active matters; the prepared multi-metal catalyst of cobalt, zirconium and molybdenum is favorable in catalytic performance; under normal pressure and at a temperature of 750 DEG C, conversion rate of methane reaches to above 90%; conversion rate of carbon dioxide reaches to above 87%; after a service life test of 300 hours, the catalyst performs excellent catalytic activity and stability.

The invention relates to a catalyst for reforming methane with carbon dioxide for preparing synthetic gas, which is a bead catalyst prepared by taking SiO2 as a vector and Ni and La as active components by a co-impregnation method. The catalyst provided by the invention has good mechanical properties and thermal stability, long service life, simple preparation method, low cost and easy acquisition of raw materials, relatively mild reaction conditions and no need of any diluent gas; the catalyst has good catalytic property for reforming the methane with the carbon dioxide for preparing the synthetic gas; the conversion rates of the methane and the carbon dioxide can respectively reach 79.4-90.8% and 86.1%-92.8% under ordinary pressure; and the volume ratio CO to H2 in the prepared synthetic gas is 1.13-1.18.

The invention discloses a method for preparing synthesis gas through catalytic reforming of methane and carbon dioxide and belongs to the technical field of catalytic reactions. According to the method, a supported uranium-based multi-metal catalyst is taken as a catalyst for a reforming reaction of methane and carbon dioxide. The catalyst is prepared from a primary reactive metal component, namely, uranium, secondary reactive metal components and a carrier, wherein the content of uranium in the catalyst is 0.05%-30% by mass, the secondary reactive metal components comprise one or more of thorium, nickel, cobalt, molybdenum, palladium, platinum, ruthenium, rhodium and iridium, and the content of the secondary reactive metal components in the catalyst is 0.01%-20% by mass; the carrier is one of a carbon carrier, inorganic oxide and molecular sieves or a mixed carrier of more of the carbon carrier, inorganic oxide and the molecular sieves. The pressure for the reforming reaction of methane and carbon dioxide is 50 atm lower than the normal pressure, and the reaction temperature is 450-950 DEG C. The method for preparing the synthesis gas through catalytic reforming of methane and carbon dioxide has the advantages of wide reaction temperature range, high catalyst activity, good stability, carbon deposition resistance and the like.

The invention discloses an efficient methane and carbon dioxide reforming Ni/SiO2 catalyst and an electrospinning preparation method, and belongs to the technical field of catalyst preparation. Through electrospinning technique, an efficient silica nanofiber supported nickel nanoparticle catalyst can be prepared. The preparation method comprises the following steps: first preparing a spinning precursor solution, then electrospinning, and finally drying and roasting to prepare a finished product. The preparation method has the advantages of easily obtained raw materials, simple operation, and good controllability, and is conducive to industrialized enlargement. The catalyst used in reaction for preparation of synthesis gas by methane and carbon dioxide catalytic reforming, and has the advantages of high catalytic activity, good resistance to deposition of carbon, good stability and the like.

The invention discloses a method for preparing synthesis gas by reforming methane and carbon dioxide. An active component of a catalyst adopted by the method is NiO, a carrier consists of TiO2 and SiO2, the reaction temperature is between 700 and 850 DEG C under normal pressure, and the components are subjected to reforming reaction in a fixed bed reactor under the operation condition that the air speed is 18,000 to 72,000mlh<-1>g<-1>. The highest conversion rates of the methane and the carbon dioxide reach more than 88 percent and 97 percent respectively, the highest yields of H2 and CO reach more than 85 percent and 93 percent respectively, and the catalyst after being stabilized for 30 hours does not lose activity remarkably.

The present invention relates to a catalyst for reforming a hydrocarbon comprising a carrier containing manganese oxide and carried thereon (a) at least one component selected from a ruthenium component, a platinum component, a rhodium component, a palladium component, an iridium component and a nickel component and a process for producing the same and to a process for reforming a hydrocarbon (steam reforming, self thermal reforming, partial oxidation reforming and carbon dioxide reforming) using the above catalyst. Provided are a catalyst for reforming a hydrocarbon which comprises ruthenium, platinum, rhodium, palladium, iridium or nickel as an active component and in which a reforming activity is elevated, a process for producing the same, and a steam reforming process, a self thermal reforming process, a partial oxidation reforming process and a carbon dioxide reforming process for a hydrocarbon using the above catalyst.

The invention provides an industrial catalyst for producing synthesis gas by natural gas-carbon dioxide reforming. The catalyst comprises the following components in percentage by weight: 5 to 19 percent of Ni, 20 to 70 percent of La, and 0 to 2 percent of precious metal; and the catalyst is prepared by powder molding or the impregnation of a carrier by an active constituent, and the carrier is amolecular sieve and a molding additive. The catalyst has high catalytic activity through a micro-reactor and pilot magnification activity evaluation; and compared with other catalysts, the catalyst has strong carbon deposition resistance and steady performance. The catalyst is suitable to produce the synthesis gas by reforming natural gas and carbon dioxide, and also is suitable to produce the synthesis gas by reforming combined raw materials such as flue gas, coke-oven gas and coal bed gas of fuel electric plants, dry gas of oil refineries and the like.

The present invention relates to a preparation method of a highly-dispersed supported Ni catalyst used for producing synthesis gas through carbon dioxide reforming of methane, and belongs to the technical fields of nature gas chemical industry and catalyst manufacturing engineering. The preparation method is characterized by comprising the following steps: adopting a tri-block copolymer P123 (polyethylene glycol-polypropylene glycol-polyethylene glycol, PEG-PPG-PEG) as an auxiliary additive in a Ni catalyst preparation process; using an aqueous solution of Ni(NO3)2-6H2O and P123 as impregnation liquid; using mesoporous silica SBA-15 as a carrier; and carrying out the process of impregnation, drying and calcinations to prepare the supported Ni catalyst Ni/SBA15-P123(1/X). The addition amount of P123 in the preparation process of the supported Ni catalyst is that the molar ratio 1/X of P123 to Ni being 1/750-1/3, preferably 1/500-1/50. The synthesis gas is prepared after a reaction under a normal pressure by using the supported Ni/SBA15-P123 (1/X) as a catalyst and using methane and carbon dioxide as raw material gas. The Ni/SBA15-P123 (1/X) catalyst prepared by using the process method of the present invention has high activity and excellent stability in the reaction of reforming the methane with the carbon dioxide.

The invention discloses a novel solid catalyst material for methane carbon dioxide reforming reaction, a corresponding widely-applicable preparation method and a simply and easily operated testing andreacting process. According to the perovskite catalyst, a substrate is a perovskite material which includes in-situ precipitated B-site doped metal nano-particles and an A site short of positive ions. The in-situ precipitated B-site high-activity metal nano-particles for catalyzing cover the surface of the substrate, the A site is any one of a rare earth element and an alkali-earth metal element,and a B-site substrate is doped transition metal with various valence states. The perovskite catalyst can provide good catalytic performances, and carbon deposit and catalyst deactivation caused by carbon deposit in reforming reaction are avoided. The in-situ precipitated-in-situ reaction preparation and testing method has the advantages of simplicity in operation, practicability, high efficiencyand novelty. The method has a good application prospect in a preparation and testing process of the catalyst.

Disclosed is a method for methanol synthesis using synthesis gas obtained from reforming of natural gas with carbon dioxide. First, synthesis gas is obtained from steam carbon dioxide reforming of methane, in which steam reforming of natural gas is carried out simultaneously with carbon dioxide reforming of methane, by using a catalyst (Ni/Ce/MgAlO_x, or Ni/Ce—Zr/MgAlO_x) and processing condition capable of maintaining a predetermined ratio of carbon monoxide, carbon dioxide, and hydrogen [H₂/(2CO+3CO₂)=0.85-1.15] Next, methanol synthesis is carried out by using the obtained synthesis as and a catalyst system suitable for methanol synthesis with minimum byproduct formation (a catalyst system including a Cu—Zn—Al oxide containing CuO, ZnO, and Al₂O₃ at a predetermined ratio in combination with a cerium-zirconium oxide obtained by a sol-gel process). In addition, unreacted synthesis gas remaining after the operation of methanol synthesis is recycled efficiently to improve the carbon availability (methane and CO₂ availability) and energy efficiency in the overall process.

The invention provides a method and a device for preparing syngas by reforming natural gas and carbon dioxide. The method comprises the following steps: sulfur-containing natural gas with the concentration of at least 99.0 mol percent and hydrogen are premixed, preheated, and sent into a hydrodesulphurization reactor as a desulphurization unit; the sulfur content of the natural gas is lowered through the hydrogenation and adsorption of a catalyst; and the syngas is obtained in a reforming reactor provided with a reforming nickel catalyst after the natural gas and carbon dioxide are premixed and preheated. The method and the special device thereof are applicable to the comprehensive utilization of natural gas and carbon dioxide.

The invention discloses a preparation method for rapidly preparing a highly-dispersed nickel-based catalyst for methane reforming with carbon dioxide. A high-temperature-resistant mesoporous material with a large specific surface area and ordered mesoporous passages is adopted as a carrier of the catalyst, a nickel precursor salt and the mesoporous material are ground and stirred to uniformly disperse the nickel precursor salt on the surface of the mesoporous material carrier which is not de-molded by adopting a solid-state grinding method, and during drying, the nickel precursor salt enters the passages to obtain a nickel catalyst with highly-dispersed active ingredients and high carbon deposition resistance and sintering resistance by calcination and H2 reduction. The preparation method has the advantages of simple preparation process, high catalysis efficiency, energy saving (calcination is not required during preparation of the carrier), uniform distribution of the active ingredients and the like.

The invention mainly relates to a mesoporous alumina nickel-based catalyst for carbon dioxide reforming methane reaction and a preparation method of the mesoporous alumina nickel-based catalyst. The method comprises the following steps: forming sol-gel by controlling the titration rate of ammonium carbonate through partial hydrolysis methods of an inorganic salt and the ammonium carbonate; and then burning at 800 DEG C to prepare the nickel-based catalyst, wherein addition of a template agent and an organic salt is not required. The nickel-based catalyst prepared by the method has super-high activity and stability; and the activity and the stability of lanthanum added as an assistant are the best. The preparation method is simple in process and low in cost; the prepared nickel-based catalyst has the advantages of high specific surface area, narrow pore size distribution and relatively large pore volume; nickel oxides and assistants metal oxides are highly dispersed and have relatively high CO2 reforming CH4 catalytic activity and stability; the raw materials are cheap and easy to get; and the preparation process is easy to control and easy to industrialize.