Preparation method of oxide modified MCM-48 molecular sieve, and applications of oxide modified MCM-48 molecular sieve in denitration synergistic mercury removal

A MCM-48, molecular sieve technology, applied in the field of molecular sieve, can solve the problems of lack of system, in-depth understanding of reaction mechanism, difference in flue gas composition, poor poisoning performance, etc., and achieve good mercury removal performance, simple method and large pore size effect.
CN110354892AActive Publication Date: 2019-10-22SHANDONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANDONG UNIV OF SCI & TECH
Publication Date
2019-10-22

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Abstract

The invention discloses a preparation method of an oxide modified MCM-48 molecular sieve, and applications of the oxide modified MCM-48 molecular sieve in denitration synergistic mercury removal, andrelates to the technical field of molecular sieves. The method comprises: pre-treating a MCM-48 molecular sieve with no templating agent removal; synthesizing a MnN mixed solution by using a manganeseoxide as an active material and using a N oxide as an auxiliary agent; adding the MnN mixed solution to the molecular sieve, carrying out impregnation treatment, and drying; calcining the dried molecular sieve in air; and finally obtaining the oxide modified MCM-48 molecular sieve. According to the present invention, NOx and Hg0 removal experiments are performed on the prepared oxide modified MCM-48 molecular sieve, and denitration and mercury removal efficiency experiments are performed on the prepared oxide modified MCM-48 molecular sieve having different manganese-to-lanthanum molar ratiosby using different molar ratios, wherein the experiment results prove that the oxide modified MCM-48 molecular sieve has good mercury removal performance while can efficiently remove NOx at a low temperature.
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Description

Technical field

[0001] The invention relates to the technical field of molecular sieves, in particular to a method for preparing molecular sieves for denitration and mercury removal. Background technique

[0002] MCM-48 molecular sieve is a uniform pore size of about 2.6nm, two sets of mutually independent three-dimensional spiral tunnel structure, with good long-range periodicity and structural characteristics of stable framework, with good hydrothermal and thermal stability Therefore, it is particularly suitable for high-temperature processes and is likely to be developed as an excellent industrial catalyst. It has very attractive application prospects in selective catalysis, adsorption and separation of macromolecules, etc., and can be used as an adsorbent and catalytic material in industry. And because of its large pore size, it can well adsorb heavy metal ions that have a large Hg plasma radius and are not easily adsorbed by the microporous molecular sieve from wastewater. ...

Claims

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