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A kind of methanol cracking catalyst and preparation method thereof

A methanol cracking and catalyst technology is applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc. Highly selective effect

Inactive Publication Date: 2014-10-22
BEIJING FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The catalyst of the invention has the advantages of low temperature, high activity, high CO selectivity, simple process, and no pollution, but requires more expensive plasma equipment

Method used

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  • A kind of methanol cracking catalyst and preparation method thereof
  • A kind of methanol cracking catalyst and preparation method thereof
  • A kind of methanol cracking catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] 1. Preparation of cellulose solution

[0049] 1A) Add 3.5g of sodium hydroxide and 6g of urea into 40.5g of water, stir and dissolve evenly to form a sodium hydroxide / urea aqueous solution, wherein the mass percentage of sodium hydroxide is 7%, and the mass percentage of urea is 12% ; The mass ratio of sodium hydroxide to urea is 7:12;

[0050] 1B) Add 3 g of cellulose into the above sodium hydroxide / urea solution and stir to obtain a uniformly dispersed cellulose solution, wherein the mass percent concentration of cellulose in the cellulose solution is 6%.

[0051] 2. Ultrasonic treatment

[0052] 2A) Add 0.34g of copper chloride and 10ml of the above cellulose solution into 30ml of water, stir well until there is no precipitation, and make a suspension, wherein, the amount of copper ions added to the cellulose solution per millimole is 5mL; The amount of water added to the copper ions is 15mL;

[0053] 2B) Put the suspension into an ultrasonic reactor (Ningbo Xinzh...

Embodiment 2

[0062] In addition to the process of preparing the cellulose solution, the amount of cellulose is 3.522g, and the mass percent concentration of the cellulose solution is 7.044%; the copper salt in the ultrasonic treatment process is copper nitrate, and the quality of copper nitrate is 0.241g, and every millimole of copper The amount of ions added to the cellulose solution is 10mL; the amount of water added per millimole of copper ions is 30mL, the temperature is 90±2°C; the frequency of ultrasonic treatment is 24kHz; the pulse time of ultrasonic waves is 1S:1S, that is, the ultrasonic waves continue to occur The time is 1S (on), the ultrasonic wave stop generation time (i.e. intermittent time) is 1S (off), and the ultrasonic treatment time is 20min; during the calcination process, the calcination temperature is 400°C, and the calcination time is 6h, and the rest are the same as in Example 1 .

[0063] Using X-ray diffraction, the composition and purity of the prepared copper-b...

Embodiment 3

[0065] In addition to the process of preparing the cellulose solution, 5.0g sodium hydroxide and 7.5g urea were added to 37.5g water to form a sodium hydroxide / urea solution, wherein the mass percentage content of sodium hydroxide was 10%, and the mass percentage concentration of urea was 15%; the mass ratio of sodium hydroxide to urea is 10:15; the consumption of cellulose is 3.522g, and the mass percent concentration of cellulose solution is 7.044%; the copper salt in the ultrasonic treatment process is copper acetate, the content of copper acetate The mass is 0.199g, the amount of cellulose solution added per millimole of copper ions is 10mL; the amount of water added per millimole of copper ions is 30mL, the temperature is 90±2°C; the frequency of ultrasonic treatment is 20kHz; the pulse time of ultrasonic It is 5S:5S, that is, the continuous time of ultrasonic wave is 5S (on), the time of ultrasonic stoppage (ie intermittent time) is 5S (off), and the time of ultrasonic tr...

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Abstract

The invention provides a methanol cracking catalyst and a preparation method thereof. The preparation method comprises the steps of: by taking copper salt and cellulose as raw materials and sodium hydroxide / urea water solution as a solvent, and carrying out fast preparing by adopting an ultrasonic treatment method; and preparing the methanol cracking catalyst by carrying out forging in inert atmosphere. The methanol cracking catalyst prepared by utilizing the preparation method has the advantages that the catalytic activity is strong, the selectivity and the stability are high, the methanol conversion rate is high, the selectivity of H2+CO in products is high, and the application prospect in the field of methanol catalytic cracking is wide.

Description

technical field [0001] The invention relates to the field of catalytic cracking of low-carbon alcohols, in particular to a Cu catalyst for methanol cracking and a preparation method thereof. Background technique [0002] The methanol cracking product is synthesis gas, which is the basic raw material for chemical production and a protective gas for the heat treatment industry. It can also be blended with gasoline and diesel and used as fuel for vehicle-mounted systems. At present, there are mainly two systems of methanol cracking catalysts: noble metal and non-noble metal. The precious metal system is mainly Pd, Pt, Rh and other catalysts. For example, the authorized announcement number is CN1098123C invention patent discloses a methanol low-temperature cracking catalyst prepared by impregnation method or ion exchange method. The catalyst is composed of the following raw materials in weight percentage: Pd2-3%, earth elements 22-35%,, γ-Al 2 o 3 62-76%. Although the cataly...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/72C01B3/22
Inventor 马明国孙少龙付连花董闫闫邓甫孙润仓
Owner BEIJING FORESTRY UNIVERSITY
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