A kind of preparation method of non-precious metal biogas deoxidation catalyst

A deoxygenation catalyst, non-precious metal technology, applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of increased cost of biogas deoxygenation treatment, easy deactivation of catalysts, high temperature and high temperature, and achieves inhibition of catalysis. Aging, low cost, and the effect of improving catalytic activity

Active Publication Date: 2019-01-04
南京碳环生物质科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems that the existing biogas deoxygenation catalyst needs to be loaded with precious metals, and the cost is relatively high, the catalyst is easy to deactivate, the high temperature is high, and the cost of biogas deoxidation treatment increases, etc., and to invent a non-precious metal type biogas deoxidation Catalyst preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of preparation method of non-noble metal type biogas deoxidation catalyst, it comprises the following steps:

[0020] Step 1 Preparation of titanium-silicon molecular sieve carrier: Add 20g sodium silicate, 2 white carbon black, 8g NaOH, 3g KCl, and 3g water glass into 50g deionized water according to the following ratio, stir vigorously at room temperature to mix evenly, and continue stirring for 120min. The resulting suspension was transferred to a 300mL autoclave, subjected to hydrothermal reaction at 280°C for 72h, cooled to room temperature, filtered, washed and dried at 75°C for 6h to obtain a titanium silicon molecular sieve material. The prepared molecular sieve has a pore size of 2.3-3.7nm and a specific surface area of ​​620-650m 2 / g range.

[0021] Step 2 Titanium-silicon molecular sieve carrier modification: 8g FeCl 3 , 4g MgCl 2 1. Add 4g LiCl into 50g deionized water, add 20g prepared titanium-silicon molecular sieve after dissolving, stir evenl...

Embodiment 2

[0024] A kind of preparation method of non-noble metal type biogas deoxidation catalyst, it comprises the following steps:

[0025] Step 1 Preparation of titanium-silicon molecular sieve carrier: Add 5g sodium silicate, 8g white carbon black, 3g NaOH, 1g KCl, and 1g water glass into 50g deionized water according to the following ratio, stir vigorously at room temperature to mix evenly, and continue stirring for 30min. The resulting suspension was transferred to a 300mL autoclave, subjected to hydrothermal reaction at 200°C for 36h, cooled to room temperature, filtered, washed and dried at 65°C for 12h to obtain a titanium silicon molecular sieve material. The prepared molecular sieve has a pore size of 2.3-3.7nm and a specific surface area of ​​620-650m 2 / g range.

[0026] Step 2 Titanium-silicon molecular sieve carrier modification: 3g FeCl 3 , 1g MgCl 2 , 8g LiCl was added to 50g deionized water, after dissolving, add 10g prepared titanium silicon molecular sieve, stir e...

Embodiment 3

[0029] A kind of preparation method of non-noble metal type biogas deoxidation catalyst, it comprises the following steps:

[0030] Step 1 Preparation of titanium-silicon molecular sieve carrier: add 15g sodium silicate, 5g white carbon black, 6gNaOH, 2gKCl, 1-3g water glass into 50g deionized water according to the following ratio, stir vigorously at room temperature to mix evenly, and continue stirring for 60min , the resulting suspension was transferred to a 300mL autoclave, hydrothermally reacted at 240°C for 50h, cooled to room temperature, filtered, washed and dried at 70°C for 9h to obtain a titanium silicon molecular sieve material. The prepared molecular sieve has a pore size of 2.3-3.7nm and a specific surface area of ​​620-650m 2 / g range.

[0031] Step 2 Titanium-silicon molecular sieve carrier modification: mix 6g FeCl 3 , 3g MgCl 2 1. Add 3g LiCl into 50g deionized water, add 15g prepared titanium-silicon molecular sieve after dissolving, stir evenly, adjust p...

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Abstract

The invention relates to a preparation method of a non-noble-metal biogas deoxidation catalyst. The method is characterized by comprising the following steps: firstly, preparing a titanium silicon molecular sieve carrier with the characteristic of high hydrophobicity, wherein the influence of vapor on deoxidation catalytic reaction is avoided, and the pore size of the titanium silicon molecular sieve carrier is controlled at 2.3-3.7nm; secondly, carrying out modification treatment on the titanium silicon molecular sieve carrier, wherein Fe-Mg-Li cation exchange is performed to effectively increase the pore size of the molecular sieve and reinforce the gas-phase mass transfer in gas phase mass transfer process; and thirdly, carrying out active component supporting on the modified titanium silicon molecular sieve, wherein Mn, Cu and Zr metal oxide active components are supported to effectively regulate the pH value of the catalyst, enhance the catalytic activity and inhibit the catalyst from aging. The method has the advantages of simple technique and low cost. The prepared catalyst has the advantages of high activity and long service life.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation technology of a deoxidation catalyst, in particular to a preparation method of a non-precious metal biogas deoxidation catalyst. Background technique [0002] Biogas mainly comes from sewage treatment plants, domestic waste treatment facilities, landfills, etc., and is a gaseous product in the anaerobic digestion process of organic waste. Biogas is rich in methane and is the largest source of methane emissions caused by human activities, so it is a greenhouse gas that needs to be strictly controlled. [0003] In order to control biogas emissions, burning biogas to generate electricity or purifying it into vehicle gas has become the main way to recycle biogas. In the process of biogas purification and refining vehicle gas, a small amount of oxygen contained in biogas needs to be removed. The traditional biogas deoxidation method is to use noble metals (such as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/89C10L3/10
CPCB01J29/89C10L3/103
Inventor 陈泽智吴未立王慧王卫星陈廷超徐明刚王卫兵杨军
Owner 南京碳环生物质科技有限公司
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