Method for preparing mesoporous silica with biomass power plant ash as raw material

Abstract

The invention discloses a method for preparing mesoporous silica with biomass power plant ash as a raw material. The preparation method comprises the steps that: silicon source purification is carried out, wherein biomass power plant ash produced in a biomass power plant is purified, such that pure silica is obtained; organic silicon is obtained, wherein the silica is chloridated and alcoholized, such that organic silicon is obtained; and mesoporous SiO2 is obtained, wherein SiO2 mesoporous molecular sieve is prepared with the organic silicon as a raw material. With the method, flue dust produced by combustion in the biomass power plant can be reasonably utilized, environment pollution caused by biomass power plant ash can be reduced, large-scale industrial productions of mesoporous materials can be greatly promoted, and further studies and wider applications of the novel nano-grade mesoporous material can be promoted.

Description

technical field [0001] The invention relates to the preparation technology of nano mesoporous silicon dioxide material, in particular to a method for preparing mesoporous silicon dioxide by using biomass power plant ash as raw material. Background technique [0002] Mesoporous materials refer to a class of porous materials with pore sizes ranging from 2 to 50 nm. As a new type of nanomaterial, it has excellent characteristics that other porous materials do not have: highly ordered pore structure; single distribution of pore size, and the pore size can be varied in a wide range; various mesopore shapes, pore wall composition and properties It can be regulated; high thermal stability and hydrothermal stability can be obtained by optimizing the synthesis conditions. Potential value in variable energy storage and other aspects. Therefore, both theoretical research and practical production of mesoporous materials are of great significance. However, due to various limitations o...

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Problems solved by technology

[0004] However, in the prior art, the treatment of biomass power plant ash (that is, the soot emitted by power plants) is a difficult problem

If the biomass power plant ash is returned to the field, there are two problems: one is that it is too alkaline to change the acidity and alkalinity of the soil and damage the plant growth environment; the other is that the biomass power plant ash is the soot emitted by the power plant , the particle size is less than 45μm, almost contains no water, it is easy to form floating dust in the air, and it is sprinkled on the farmland to cause secondary pollution

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