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High-selectivity methyl-alcohol cracking catalyst, preparation method and application

A methanol cracking, high-selectivity technology, used in physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, etc. It can solve problems such as general performance, and achieve the effect of simplifying the pretreatment process, reducing the separation load, and avoiding frequent replacement.

Inactive Publication Date: 2012-04-18
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Through the analysis, it can be known that various types of methanol cracking catalysts reported in literature and patents have a common feature, that is, hydrogen pre-reduction treatment is required before the reaction, which requires an external hydrogen source, and the process is complicated. time-consuming and dangerous
In addition, the selectivity of catalysts currently used in industry is general, such as Cu / Zn / Al 2 o 3 The selectivity of the catalyst is only 91% at normal pressure and 300°C, resulting in a large subsequent separation load

Method used

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  • High-selectivity methyl-alcohol cracking catalyst, preparation method and application
  • High-selectivity methyl-alcohol cracking catalyst, preparation method and application
  • High-selectivity methyl-alcohol cracking catalyst, preparation method and application

Examples

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Effect test

Embodiment 1

[0023] Weigh 34.49g Cu(NO 3 ) 2 ·3H 2 O, 25.75g Zn(NO 3 ) 2 ·6H 2 O, prepared as a solution, with SiO 2 As a carrier, prepared by impregnation method, dried at 100°C for 15h, and calcined at 600°C for 3h under nitrogen atmosphere, the catalyst composition was CuO=16.6%, ZnO=10.3%, SiO 2 = 73.1%. The obtained catalyst is loaded into the reactor, and the temperature is directly raised to 300°C, and the mass space velocity is 1.5h -1 , 0.01MPa, methanol conversion rate 80.2%, H 2 +CO selectivity 99.1%. Increase the reaction pressure to 1.5MPa, reduce the mass space velocity to 0.1h -1 , temperature unchanged, methanol conversion rate 90%, H 2 +CO selectivity 97.5%.

Embodiment 2

[0025] Weigh 29.80g Cu(NO 3 ) 2 ·3H 2 O, 9.25g La(NO 3 ) 3 ·6H 2 O, prepared as a solution, with SiO 2 As a carrier, prepared by impregnation method, dried at 120°C for 10h, and calcined at 500°C for 4h under air atmosphere, the catalyst composition was CuO=15.5%, La 2 o 3 =5.5%, SiO 2 = 79%. At 330°C, WHSV=1.8h -1 , 0.01MPa conditions, methanol conversion 78.5%, H 2 +CO selectivity 99.2%.

Embodiment 3

[0027] With 71.39g Cu(NO 3 ) 2 ·3H 2 O, 46.59g Ni(NO 3 ) 2 ·6H 2 O, prepared as a solution, with SiO 2 As a carrier, prepared by impregnation method, dried at 110°C for 13h, and calcined at 450°C for 6h under air atmosphere, the catalyst composition was CuO=27.5%, NiO=14%, SiO 2 = 58.5%. At 320°C, mass space velocity 2.5h -1 , 0.01MPa, methanol conversion rate 93.68%, H 2 +CO selectivity 99.0%. Increase the reaction pressure to 3.0MPa, reduce the space velocity to 1.0h -1 , methanol conversion 90.0%, H 2 +CO selectivity 97.3%.

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Abstract

The invention relates to a high-selectivity methyl-alcohol cracking catalyst, comprising the following components in percentage by weight: 15%-28% of CuO, 5%-15% of MxOy and 57%-80% of SiO2, wherein the MxOy is one of ZnO, NiO, La2O or CeO2. The high-selectivity methyl-alcohol cracking catalyst has the advantages of no need of hydrogen reduction treatment in the pretreatment process, and better stability, selectivity and regenerability in catalyzing the methyl-alcohol cracking reaction.

Description

technical field [0001] The invention belongs to a methanol cracking catalyst, its preparation method and application, in particular to a highly selective methanol cracking catalyst, its preparation method and application. technical background [0002] methanol cracking (CH 3 OH=CO+2H 2 ) product is H 2 and CO, that is, synthesis gas, and supplemented by pressure swing adsorption, temperature swing adsorption and other separation methods to obtain high-purity H 2 , CO, these products have extensive and important uses. However, the methanol cracking reaction is often accompanied by other side reactions. The corresponding by-products include dimethyl ether, methyl formate, methane, carbon dioxide, water, etc. These by-products greatly increase the load of subsequent separation. For this reason, the development of a catalyst with high selectivity becomes the core of this technology. [0003] Methanol cracking catalysts mainly include copper-based, chromium-based, nickel-bas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/80B01J23/83B01J23/755B01J23/94C01B3/22
CPCY02P20/584
Inventor 高志贤庆绍军侯晓宁郗宏娟李东升李林东胡蕴青邱诗铭李光俊谷传涛董凌曜王海荣
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI