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Preparation method of modified molecular sieve ZSM-5 catalyst and application thereof in biomass pyrolysis

A technology of ZSM-5 and molecular sieve, which is applied in the direction of molecular sieve catalysts, chemical instruments and methods, and the preparation of liquid hydrocarbon mixtures, etc. It can solve the problems of environmental pollution, poor selectivity, and low efficiency, and achieve low equipment requirements and improved catalytic performance. , cost reduction effect

Inactive Publication Date: 2017-10-20
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As the foundation of the modern chemical industry, catalytic technology is increasingly widely and deeply infiltrated in petroleum refining, chemistry, polymer materials, medicine and other industries and environmental protection industries, and plays a pivotal role; for a long time, the traditional Catalysts often have shortcomings such as low activity and poor selectivity. At the same time, they generally require harsh reaction conditions such as high temperature and high pressure, and they consume a lot of energy, have low efficiency, and some cause pollution to the environment. Therefore, human beings continue to explore and study new catalysts. Efficient environment-friendly green catalyst;

Method used

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  • Preparation method of modified molecular sieve ZSM-5 catalyst and application thereof in biomass pyrolysis
  • Preparation method of modified molecular sieve ZSM-5 catalyst and application thereof in biomass pyrolysis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Modified molecular sieve (ZSM-5) catalyst:

[0026] ①Weigh an appropriate amount of zeolite catalyst ZSM-5 (Si / Al=36) with a medicine spoon and place it in a muffle furnace and calcinate at 550°C for 6 hours, and reserve it for use.

[0027] ②Weigh 1g of ZSM-5, dissolve it with 60mL of deionized water, put the medicine into a three-necked flask, set the temperature of the water bath to 80℃, fix the three-necked flask, heat and stir for two hours to make it fully react.

[0028] ③After heating, pour the medicine into a beaker, place it in a blast drying box, and dry it at 100°C for 10 hours. The medicine attached to the bottom of the beaker was taken out, poured into a crucible, and calcined at 600°C for 3 hours. After calcination, the sample obtained is the ZSM-5 catalyst. After grinding with a mortar, catalyst particles of 20-40 mesh can be obtained.

[0029] (2) Use the modified molecular sieve (ZSM-5) catalyst prepared in (1) to conduct a rapid thermal cracking test in...

Embodiment 2

[0032] According to the steps of (1) in Example 1, the difference is:

[0033] ②Weigh 0.434g (1mmol) Ce(NO 3 ) 3 ·6H 2 Dissolve O and 1g ZSM-5 with 60mL deionized water, and put the medicine into a three-necked flask. Set the temperature of the water bath to 80°C, fix the three-necked flask, heat and stir for two hours to fully react.

[0034] ③After heating, pour the medicine into a beaker, place it in a blast drying box, and dry it at 100°C for 10 hours. The medicine attached to the bottom of the beaker was taken out, poured into a crucible, and calcined at 600°C for 3 hours. After the calcination, the sample obtained is the Ce / ZSM-5 catalyst. After grinding with a mortar, catalyst particles of 20-40 mesh can be obtained.

[0035] (3) Calculate the yield of the three-phase product obtained in step (2). When the Enteromorpha polysaccharides undergo rapid pyrolysis in a fixed bed device, bio-oil, bio-coke and non-condensable gas are added after the addition of this modified molecu...

Embodiment 3

[0037] According to the steps in Example 2, the difference is:

[0038] (2) Take dried hijiki polysaccharides as raw material for pyrolysis, and add modified molecular sieve (ZSM-5) catalyst to it, the mass ratio of raw material to catalyst is 10:1, open the feeding device to quickly complete feeding, and set The reaction time is 20min. The raw material undergoes a rapid pyrolysis reaction, and a large amount of pyrolysis gas is generated in a short time. The condensable gas is condensed into bio-oil through the condensation device, and the non-condensable gas is collected by the terminal gas collecting bag. After the device has cooled, take out the semi-coke.

[0039] (3) Calculate the yield of the three-phase product obtained in step (2). When hijiki polysaccharides undergo rapid thermal cracking in a fixed bed device, bio-oil, bio-coke and non-condensable gas are added after the modified molecular sieve catalyst is added. The yields were 30.1%, 42.35% and 27.55%.

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Abstract

Belonging to the technical field of energy material preparation, the invention relates to a preparation method of a modified molecular sieve ZSM-5 catalyst and application thereof in biomass pyrolysis, especially in hydrocracking reaction of algae. The synthesis method of the catalyst includes: firstly calcining ZSM-5 in a muffle furnace for standby use; then compounding a salt solution containing (Mg, Ce, Ni) elements with the ZSM-5, and conducting water bath heating for full reaction; and at the end of reaction, conducting drying and calcining to obtain the modified ZSM-5 catalyst, and performing grinding with a mortar to obtain 20-40mesh catalyst particles. The modified mesoporous ZSM-5 catalyst can be applied in biomass high temperature fast pyrolytic reaction to greatly improve the raw material conversion rate.

Description

Technical field [0001] The invention belongs to the technical field of energy material preparation, and relates to a method for preparing a modified molecular sieve (ZSM-5) catalyst and its application in biomass pyrolysis, in particular to the application in the hydrocracking reaction of seaweed. Background technique [0002] As the foundation of the modern chemical industry, catalytic technology is increasingly widely and deeply penetrated into petroleum refining, chemistry, polymer materials, pharmaceuticals and other industries and environmental protection industries, playing a pivotal role; for a long time, traditional industrial use Catalysts often have shortcomings such as low activity and poor selectivity. At the same time, they generally require harsh reaction conditions such as high temperature and high pressure, and have high energy consumption and low efficiency, and some of them will pollute the environment. For this reason, humans continue to explore and research new...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40B01J29/46C10B53/00C10B53/02C10G1/00
CPCB01J29/40B01J29/405B01J29/46C10B53/00C10B53/02C10G1/00C10G2300/1011Y02E50/10
Inventor 刘馨琳夏禛王爽曹斌冯永强
Owner JIANGSU UNIV