Bimetal-modified nano-HZSM-5 molecular sieve catalyst as well as preparation method and application thereof

A molecular sieve and catalyst technology, applied in the field of catalyst materials, can solve the problems of unsatisfactory application of ZSM-5 modified catalyst, and achieve the effect of moderate specific surface area

Inactive Publication Date: 2019-06-21
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, for the methanol aromatization reaction, the application of ZSM-5 modified catalyst is not always ideal. Therefore, in order to solve the above defects, it is necessary to provide a catalyst with excellent performance, simple preparation method and friendly synthesis conditions, and especially in the aspect of methanol aromatization Catalysts with higher selectivity and yield have become a technical problem to be solved urgently

Method used

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  • Bimetal-modified nano-HZSM-5 molecular sieve catalyst as well as preparation method and application thereof
  • Bimetal-modified nano-HZSM-5 molecular sieve catalyst as well as preparation method and application thereof
  • Bimetal-modified nano-HZSM-5 molecular sieve catalyst as well as preparation method and application thereof

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Embodiment 1

[0035] A preparation method of Zn-Ga-HZSM-5 molecular sieve catalyst, comprising the following steps:

[0036]Step 1), preparation of gel: according to raw material silicon aluminum ratio Si:Al=13, templating agent M:Al 2 o 3 =6.8, H 2 O: Al 2 o 3 =1149 takes each raw material, the quality of aluminum source is 0.297g, the H of weighing 10g 2 O and the template agent M are prepared into a template agent solution, after mixing evenly, keep stirring in a water bath at 30°C for 30min; another part of the water and 0.297g of NaAlO 2 (i.e. aluminum source) is formulated into an aluminum source solution, the aluminum source solution is added to the template solution, after mixing evenly, keep stirring in a 30°C water bath for 30 minutes to obtain the first mixed material; finally, the silicic acid Tetraethyl ester (i.e. silicon source) was added to the first mixed material, after mixing evenly, aging for 3 hours in a water bath at 30°C to obtain a gel material;

[0037] Step 2...

Embodiment 2

[0043] A preparation method of Zn-Cd-HZSM-5 molecular sieve catalyst, comprising the following steps:

[0044] Step 1), preparation of gel: according to raw material silicon aluminum ratio Si:Al=13, templating agent M:Al 2 o 3 =6.8, H 2 O: Al 2 o 3 =1149 takes each raw material, the quality of aluminum source is 0.297g, the H of weighing 10g 2 O and the template agent M are prepared into a template agent solution, after mixing evenly, keep stirring in a water bath at 30°C for 30min; another part of the water and 0.297g of NaAlO 2 (i.e. aluminum source) is formulated into an aluminum source solution, the aluminum source solution is added to the template solution, after mixing evenly, keep stirring in a 30°C water bath for 30 minutes to obtain the first mixed material; finally, the silicic acid Tetraethyl ester (i.e. silicon source) was added to the first mixed material, after mixing evenly, aging for 3 hours in a water bath at 30°C to obtain a gel material;

[0045] Step ...

Embodiment 3

[0051] A preparation method of Zn-Cu-HZSM-5 molecular sieve catalyst, comprising the following steps:

[0052] Step 1), preparation of gel: according to raw material silicon aluminum ratio Si:Al=13, templating agent M:Al 2 o 3 =6.8, H 2 O: Al 2 o 3 =1149 takes each raw material, the quality of aluminum source is 0.297g, the H of weighing 10g 2 O and the template agent M are prepared into a template agent solution, after mixing evenly, keep stirring in a water bath at 30°C for 30min; another part of the water and 0.297g of NaAlO 2 (i.e. aluminum source) is formulated into an aluminum source solution, the aluminum source solution is added to the template solution, after mixing evenly, keep stirring in a 30°C water bath for 30 minutes to obtain the first mixed material; finally, the silicic acid Tetraethyl ester (i.e. silicon source) was added to the first mixed material, after mixing evenly, aging for 3 hours in a water bath at 30°C to obtain a gel material;

[0053] Step ...

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Abstract

The invention relates to a bimetal-modified nano-HZSM-5 molecular sieve catalyst as well as a preparation method and application thereof. An HZSM- molecular sieve catalyst is taken as a carrier and isloaded with metal Zn and metal A, wherein the metal A is selected from any of Ga, Cd, Cu and La. By performing bimetal modification on the HZSM-5 molecular sieve catalyst, the bimetal modified nano-HZSM-5 molecular sieve catalyst which is more suitable for a methanol aromatization reaction is obtained; HZSM-5 is independently synthesized, compared with the prior art, the aspects of the formula ofraw materials, a synthesis method and a process are improved, and the HZSM-5 molecular sieve catalyst which is better than the existing HZSM-5 is obtained; the modified molecular sieve catalyst is moderate in specific surface area and is more suitable for the methanol aromatization reaction.

Description

technical field [0001] The invention relates to the field of catalyst materials, in particular to a bimetallic modified nanometer HZSM-5 molecular sieve catalyst, its preparation method and application. Background technique [0002] ZSM-5 molecular sieve is widely used in the fields of catalysis, adsorption and separation due to its unique three-dimensional intersecting pore structure, large specific surface area and pore volume, good thermal stability and hydrothermal stability. In the actual use of the catalyst, in order to improve the selectivity and yield of the catalyst in the reaction process, the catalyst is often modified. At present, there are many studies on the modification of ZSM-5 molecular sieves. For the selection of modifying elements , usually focus on rare earth metal modifier elements, and the types of reactions targeted are often concentrated on the dehalogenation of halogenated organic compounds, or the isomerization of alkane and other reaction directio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40B01J29/46B01J35/10B01J37/10C07C1/20C07C15/04C07C15/06C07C15/08
CPCY02P20/52
Inventor 李建伟张冲毛庆张艳君张佳瑾
Owner BEIJING UNIV OF CHEM TECH
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