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A kind of preparation method of composite methanation catalyst

A methanation catalyst and catalyst technology, applied in the direction of producing hydrocarbons from carbon oxides, etc., can solve the problems of complex process, many influencing factors, difficult to guarantee the quality of the finished catalyst, etc., achieve good thermal stability, improve interaction force, improve Effect of crystal phase stability and thermal stability

Active Publication Date: 2015-12-30
HUANENG CLEAN ENERGY RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the patent is in the preparation of carrier active Al 2 o 3 The above process is complicated and there are many influencing factors, so it is difficult to guarantee the quality of the final finished catalyst

Method used

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  • A kind of preparation method of composite methanation catalyst
  • A kind of preparation method of composite methanation catalyst

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Experimental program
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Effect test

Embodiment 1

[0031] A preparation method of composite methanation catalyst, comprising the following steps:

[0032] Step 1. Weigh 20ml of tetrabutyl titanate and mix with 40ml of absolute ethanol, stir evenly to obtain tetrabutyl titanate ethanol mixed solution;

[0033] Step 2: Mix 25ml of deionized water with 25ml of absolute ethanol, add a small amount of nitric acid, and control the pH value between 3 and 4 to obtain a mixed aqueous solution of ethanol and nitric acid;

[0034] Step 3. Slowly add the ethanol nitric acid mixed aqueous solution at room temperature into the tetrabutyl titanate ethanol mixed solution dropwise using a peristaltic pump at 2 ml / min, stir vigorously at 1200 rpm to hydrolyze the tetrabutyl titanate, and continue stirring for 3 hours to obtain a sol;

[0035] Step 4. Dry the obtained sol at 80°C for 24 hours to form a gel, and place the gel in a muffle furnace for calcination at 500°C for 4 hours to obtain nano-TiO 2powder;

[0036] Step five, 1g nano-TiO 2 ...

Embodiment 2

[0041] A preparation method of composite methanation catalyst, comprising the following steps:

[0042] Step 1. Weigh 20ml of tetrabutyl titanate and mix with 45ml of absolute ethanol, stir evenly to obtain tetrabutyl titanate ethanol mixed solution;

[0043] Step 2: Mix 25ml of deionized water with 25ml of absolute ethanol, add a small amount of nitric acid, and control the pH value between 3 and 4 to obtain a mixed aqueous solution of ethanol and nitric acid;

[0044] Step 3. Slowly add the ethanol nitric acid mixed aqueous solution at room temperature into the tetrabutyl titanate ethanol mixed solution dropwise using a peristaltic pump at 2 ml / min, stir vigorously at 1200 rpm to hydrolyze the tetrabutyl titanate, and continue stirring for 3 hours to obtain a sol;

[0045] Step 4. Dry the obtained sol at 80°C for 24 hours to form a gel, and place the gel in a muffle furnace for calcination at 500°C for 4 hours to obtain nano-TiO 2 powder;

[0046] Step five, 1g nano-TiO 2...

Embodiment 3

[0051] A preparation method of composite methanation catalyst, comprising the following steps:

[0052] Step 1. Weigh 20ml of tetrabutyl titanate and mix with 40ml of absolute ethanol, stir evenly to obtain tetrabutyl titanate ethanol mixed solution;

[0053] Step 2: Mix 25ml of deionized water with 25ml of absolute ethanol, add a small amount of nitric acid, and control the pH value between 3 and 4 to obtain a mixed aqueous solution of ethanol and nitric acid;

[0054] Step 3. Slowly add the ethanol nitric acid mixed aqueous solution at room temperature into the tetrabutyl titanate ethanol mixed solution dropwise using a peristaltic pump at 2 ml / min, stir vigorously at 1200 rpm to hydrolyze the tetrabutyl titanate, and continue stirring for 3 hours to obtain a sol;

[0055] Step 4. Dry the obtained sol at 80°C for 24 hours to form a gel, and place the gel in a muffle furnace for calcination at 500°C for 4 hours to obtain nano-TiO 2 powder;

[0056] Step five, 1.5g nanometer...

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Abstract

The invention discloses a preparation method of a compound type methanation catalyst. The preparation method comprises the following steps: firstly, mixing tetrabutyl titanate with anhydrous ethanol to obtain a mixed solution of tetrabutyl titanate and ethanol, mixing deionized water, anhydrous ethanol and nitric acid to obtain a mixed aqueous solution of ethanol and nitric acid, adding the mixed aqueous solution of ethanol and nitric acid into the mixed solution of tetrabutyl titanate and ethanol to obtain a sol, drying to form a gel, and calcining in a muffle furnace to obtain nano TiO2 powder; secondly, mixing the nano TiO2 powder with deionized water to form a suspension, preparing a Na2CO3 solution as a precipitant, preparing a solution of Ni(NO3)2 and Al(NO3)3 or a solution of M(NO3)x, Ni(NO3)2 and Al(NO3)3 to serve as a catalyst precursor, injecting the precursor into the nano TiO2 suspension at the same time until complete deposition, then aging continuously, and filtering the solution to obtain a filter cake; and finally, washing the filter cake by using deionized water, drying the filter cake, and then calcining the filter cake to obtain a NiO / TiO2 / Al2O3 catalyst or a NiO-M / TiO2 / Al2O3 catalyst. By adopting the preparation method disclosed by the invention, the reaction activity, poisoning resistance, carbon deposition resistance and service life of the catalyst are greatly promoted.

Description

technical field [0001] The invention belongs to the technical field of synthesis gas methanation catalysts, and in particular relates to a preparation method of a composite methanation catalyst. Background technique [0002] Syngas methanation technology has become a current research hotspot. Methanation catalysts with nickel base as the main active component and activated alumina as the carrier have been widely used. However, due to the instability of the carrier, the active component is deactivated and other problems. However, efficient and stable methanation catalysts are still being further improved. [0003] In the Chinese patent application CN1043639A (named "Low Nickel Methanation Catalyst and Its Preparation Method"), non-linear heating and vacuuming are used to improve the activity, thermal stability and carbon deposition resistance of the low nickel methanation catalyst. Metal dispersion and utilization rate, but too low nickel metal loading will inevitably lead t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755B01J23/83C07C9/04C07C1/04
Inventor 王晓龙蒋彪郜时旺肖天存许世森
Owner HUANENG CLEAN ENERGY RES INST
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