A kind of nanocomposite methanation catalyst and preparation method thereof

A methanation catalyst and nanocomposite technology, applied in physical/chemical process catalysts, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc. Interaction force, high surface uniformity, high dispersion effect

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

[0006] In the Chinese patent application CN102527395A (a preparation method of a new type of methanation catalyst), the calcination temperature is too high, energy is wasted, and a series of high-temperature-resistant catalyst preparation devices are required, such as: high-temperature fast dehydrator, high-temperature cyclone separator, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The preparation method of the present embodiment comprises the following steps:

[0042] Step 1. Weigh 20ml of tetrabutyl titanate and mix with 40ml 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 nitric acid to control the pH value between 3 and 4, and obtain a mixed aqueous solution of ethanol and nitric acid;

[0044] Step 3. At room temperature, use a peristaltic pump to slowly drop the ethanol nitric acid mixed aqueous solution into the tetrabutyl titanate ethanol mixed solution, stir vigorously 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 5. Weigh 32g of pseudo-boehmite and add it to 1L of deionized water to form ...

Embodiment 2

[0051] The preparation method of the present embodiment comprises the following steps:

[0052] Step 1. Weigh 20ml of tetrabutyl titanate and mix with 45ml 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 nitric acid to control the pH value between 3 and 4, and obtain a mixed aqueous solution of ethanol and nitric acid;

[0054] Step 3. At room temperature, use a peristaltic pump to slowly drop the ethanol nitric acid mixed aqueous solution into the tetrabutyl titanate ethanol mixed solution, stir vigorously to hydrolyze the tetrabutyl titanate, and continue stirring for 2.5 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 5. Weigh 32g of pseudo-boehmite and add it to 1L of deionized water to for...

Embodiment 3

[0061] The preparation method of the present embodiment comprises the following steps:

[0062] Step 1. Weigh 20ml of tetrabutyl titanate and mix with 40ml of absolute ethanol, stir evenly to obtain tetrabutyl titanate ethanol mixed solution;

[0063] Step 2: Mix 25ml of deionized water with 25ml of absolute ethanol, add nitric acid to control the pH value between 3 and 4, and obtain a mixed aqueous solution of ethanol and nitric acid;

[0064] Step 3. At room temperature, use a peristaltic pump to slowly drop the ethanol nitric acid mixed aqueous solution into the tetrabutyl titanate ethanol mixed solution, stir vigorously to hydrolyze the tetrabutyl titanate, and continue stirring for 3 hours to obtain a sol;

[0065] 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;

[0066] Step 5. Weigh 32g of pseudo-boehmite and add it to 1L of deionized water to form ...

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PUM

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Abstract

The invention discloses a novel nano composite methanation catalyst and a preparation method thereof. The preparation method comprises the following steps: adding a tetrabutyl titanate and ethyl alcohol mixed solution dropwise into an ethyl alcohol and nitric acid mixed water solution at room temperature, and hydrolyzing tetrabutyl titanate so as to obtain sol; drying the sol to form gel, and forging to obtain nano TiO2 powder; mixing pseudo-boehmite and deionized water to obtain a turbid liquid, and adding nitric acid to obtain semitransparent sol gama-AlOOH; adding the nano TiO2 powder into the semitransparent sol gama-AlOOH, drying overnight, and baking to obtain TiO2 / gama-Al2O3 nano powder as a methanation catalyst carrier; dipping a nickel nitrate solution on the methanation catalyst carrier, drying, and forging to obtain a NiO / TiO2 / Al2O3 catalyst; and dipping an additive on the carrier, thereby obtaining a NiO-M / TiO2 / Al2O3 catalyst. According to the invention, nanoscale titanium oxide and a nanoscale aluminum oxide composite material act as the carriers, and NiO acts as an active component, so that the novel nano composite methanation catalyst is prepared.

Description

technical field [0001] The invention belongs to the field of catalyst preparation and application, and relates to a nanocomposite methanation catalyst and a preparation method thereof. Background technique [0002] As a country that is rich in coal, poor in oil, and has gas, China's coal resources account for a large proportion of the entire energy structure. At the same time, a large part of my country's coal resources is low-quality lignite, which has a low direct utilization rate and pollutes Big. Lignite is gasified into syngas to provide raw materials for downstream coal-to-natural gas, coal-to-methanol, and coal-to-oil. Among them, the coal-to-natural gas process (SNG) has a high carbon monoxide utilization rate (close to 100%) and good product selectivity. The product natural gas can be directly transported by the national natural gas pipeline. [0003] The key to the coal-to-natural gas process lies in the methanation catalyst, which generally consists of three part...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/755B01J23/83B01J23/78B01J23/889B01J23/883B01J23/887B01J21/06C07C9/04C07C1/04
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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