The invention discloses a nano nickel-based methanation catalyst which comprises the following components in percentage by weight: 20-35 % of NiO, 55-79 % of a carrier, and 01-10 % of a structure additive The nano nickel-based methanation catalyst disclosed by the invention has the advantages that the catalyst is applicable to a slurry bed methanation process, high in catalytic activity, and good in stability

Nano nickel-based methanation catalyst as well as preparation method and applications thereof

The invention discloses a nickel-aluminum catalyst as well as a preparation method and application thereof to carbon monoxide methanation. Salts of nickel and aluminum are used as raw materials and are dissolved and dispersed into ethanol to generate a liquid-phase reaction; then a roasting method to obtain the catalyst with an ordered mesoporous structure, mixed gas of hydrogen and nitrogen is introduced for reducing when the catalyst is used; and finally, the temperature is adjusted to a reaction temperature under the protection of the nitrogen and reaction gas including carbon monoxide and hydrogen is introduced into a reactor to carry out a carbon monoxide methanation reaction. According to the catalyst, the disadvantages of sintering and carbon deposition of a traditional nickel-based catalyst can be overcome; the nickel-aluminum catalyst has better catalytic activity and stability; and in a catalytic activity test, the conversion rate of CO at 450 DEG C can be up to 93% and the yield of CH4 is 72%.

Nickel-aluminum catalyst as well as preparation method and application thereof to carbon monoxide methanation

The invention discloses a methanation catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: taking aluminum isopropoxide as a raw material to prepare aluminum sol through adopting a solvent-gel method; meanwhile, directly dissolving alkali metal auxiliary agent soluble salt and alkaline earth metal or rare earth metal modified auxiliary agent soluble salt into the aluminum sol; then concentrating, spraying and molding to obtain a micro-sphere carrier precursor; after drying and roasting, screening micro-sphere powder with a certain granularity range as a catalyst carrier; taking the micro-sphere powder as a carrier and loading active metal Ni and an auxiliary agent La2O3 by adopting a isovolumetric immersion method, so as toprepare the complete methanation catalyst applicable to a micro-channel reactor. The catalyst prepared by the method has relatively high activity, hydrothermal stability and carbon deposition resisting performance.

Methanation catalyst as well as preparation method and application thereof

The invention relates to the field of a methanation catalyst, and discloses a methanation catalyst and a preparation method thereof. The preparation method comprises the following steps: 1) mixing a template and first alcohol to obtain a solution A; wherein the template is a triblock copolymer shown as a following formula (1) in the specification; 2) in a mixed solvent of second alcohol and water,mixing nickel salt, aluminium salt, an auxiliary agent metal salt and a precipitating agent to obtain a solution B; and 3) mixing the solution A and the solution B, performing a hydro-thermal reaction, washing products obtained by the hydro-thermal reaction, drying the products, and roasting the products. The methanation catalyst having an ordered meso-structure is prepared by the preparation method, The methanation catalyst has the advantages that a specific surface area is high, a tunnel structure is structured, aperture distribution is concentrated, active component dispersion is good, catalytic activity and anti-carbon formation performance are high, and the methanation catalyst can keep good stability during long-time operation.

Methanation catalyst and preparation method thereof

The invention discloses a preparation method of a synthetic gas methanation catalyst. The preparation method is characterized in that a polyoxyethylene-polyoxypropylene-polyoxyethylene triblock copolymer, one or more aluminum sources, nickel nitrate and one or more auxiliaries as raw materials undergo a one-step synthesis reaction according to a certain ratio by a solvothermal method to produce a desired product. The preparation method has simple processes. The synthetic gas methanation catalyst obtained by the preparation method has a mesoporous structure and controllable aperture sizes and catalyst particle dispersity, can show good sintering resistance, high activity at a low temperature, stability at a high temperature and high methane selectivity in methanation, and has important application values in synthesis of substitute natural gas and solution of the existing natural gas shortage problem.

Yadong Bai

Papers

Preparation method of synthetic gas methanation catalyst