Nickel-based pure silicon type molecular sieve catalyst as well as preparation method and application thereof

Abstract

The invention discloses a nickel-based pure silicon type molecular sieve catalyst. The specific surface area of the molecular sieve catalyst is 200-500m < 2 > / g, the size of the molecular sieve catalyst is 2-5nm, and the metal loading capacity of the molecular sieve catalyst is 5-10wt%. The preparation method of the nickel-based pure silicon type molecular sieve catalyst comprises the following steps of: mixing tetraethoxysilane, ethanol, diluted hydrochloric acid and a template agent; carrying out reflux condensation; making an obtained mixture stand still; adding a polymer spinning auxiliary solution and a metal salt solution, performing uniform stirring to obtain a spinning precursor solution; and carrying out electrostatic spinning, drying and roasting to finally obtain the pure silicon type molecular sieve catalyst. According to the nickel-based pure silicon type molecular sieve catalyst prepared by the electrostatic spinning method, the specific surface area of the catalyst is large; the active metal is uniformly dispersed on the carrier, the utilization rate of the active metal is high, the dispersity of the metal is high, the particle size is small, and the active metal is not easy to sinter in a strong exothermic reaction of synthesis gas methanation.

Description

technical field [0001] The invention belongs to the technical field of preparation of synthesis gas methanation catalysts, and in particular relates to a nickel-based pure silicon molecular sieve catalyst and its preparation method and application. Background technique [0002] Coal is the main energy source for my country's economic development, but the direct combustion and utilization of coal will cause serious environmental pollution, making environmental protection face enormous pressure. As people pay more and more attention to the ecological environment, natural gas, as a clean and efficient energy source, has become more and more widely used. Therefore, the development of coal-based natural gas industry is an important way to alleviate environmental problems. The key process of the coal-to-natural gas process is the methanation of syngas, and the development of efficient catalysts for the methanation of syngas is very important. [0003] Studies have shown that pure...

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Problems solved by technology

Although the prepared catalyst has good catalytic performance, the preparation process is complicated, the experimental conditions are not easy to control, and it is difficult to scale up industrially.

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