Preparation method of compound type methanation catalyst

A methanation catalyst, catalyst technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve complex processes, many influencing factors, and difficult quality of finished catalysts. Guarantee and other issues, to achieve the effects of good thermal stability, improved interaction force, improved crystal phase stability and thermal stability

Active Publication Date: 2015-04-22
HUANENG CLEAN ENERGY RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the patent is in the preparation of carrier active Al 2 o 3 The above process is complicated and t

Method used

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  • Preparation method of compound type methanation catalyst
  • Preparation method of compound type methanation catalyst

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Experimental program
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Effect test

Embodiment 1

[0031] A preparation method of a composite methanation catalyst includes the following steps:

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

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

[0034] Step 3. At room temperature, the ethanol and nitric acid mixed water solution was slowly added dropwise to the tetrabutyl titanate ethanol mixed solution using a peristaltic pump 2ml / min, vigorously stirred at 1200 rpm to hydrolyze the tetrabutyl titanate, and continuously stirred 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 at 500°C for 4 hours to obtain nano-TiO 2 powder;

[0036] Step five, add 1g nano TiO 2 The powder i...

Embodiment 2

[0041] A method for preparing a composite methanation catalyst includes the following steps:

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

[0043] Step 2: Weigh 25ml of deionized water and 25ml of absolute ethanol and mix, 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. At room temperature, the ethanol and nitric acid mixed water solution was slowly added dropwise to the tetrabutyl titanate ethanol mixed solution using a peristaltic pump 2ml / min, vigorously stirred at 1200 rpm to hydrolyze the tetrabutyl titanate, and continuously stirred 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 at 500°C for 4 hours to obtain nano-TiO 2 powder;

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

Embodiment 3

[0051] A method for preparing a composite methanation catalyst includes the following steps:

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

[0053] Step 2: Weigh 25ml of deionized water and 25ml of absolute ethanol and mix, 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. At room temperature, the ethanol and nitric acid mixed water solution was slowly added dropwise to the tetrabutyl titanate ethanol mixed solution using a peristaltic pump 2ml / min, vigorously stirred at 1200 rpm to hydrolyze the tetrabutyl titanate, and continuously stirred 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 at 500°C for 4 hours to obtain nano-TiO 2 powder;

[0056] Step five, put 1.5g nano TiO 2 ...

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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 specifically relates to a preparation method of a composite methanation catalyst. Background technique [0002] Synthesis gas methanation technology has become a current research hotspot. Methanation catalysts with nickel-based main active components and active aluminum oxide as carriers have been widely used. However, due to the instability of the carrier, the active components are deactivated and other problems Exist, efficient and stable methanation catalyst is still being further improved. [0003] In Chinese patent application CN1043639A (named "low nickel methanation catalyst and its preparation method"), nonlinear heating and vacuuming methods are used to improve the activity, thermal stability, and carbon deposition resistance of the low nickel methanation catalyst. Metal dispersion and utilization, but too low nickel metal loading will inevitably lead to shortco...

Claims

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Application Information

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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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