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Methanation catalyst taking TiO2 aerogel as carrier as well as preparation method and application of methanation catalyst

A methanation catalyst and aerogel technology, applied in the field of coal-to-natural gas, can solve the problems of unreported methanation catalyst methods and insufficient stability, and achieve the effect of improved low-temperature activity and good thermal stability

Pending Publication Date: 2021-04-02
DATANG INT CHEM TECH RESINST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Patent CN102091631A uses multiple impregnation methods to prepare a methanation catalyst for the production of synthetic natural gas, but the methanation catalyst prepared by the impregnation method may have insufficient stability under high temperature conditions
[0004] Although there have been technical reports on complete methanation catalysts for the production of synthetic natural gas prepared by different methods at home and abroad, especially in China, but currently TiO 2 The method of preparing methanation catalysts using airgel as a carrier has not been reported

Method used

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  • Methanation catalyst taking TiO2 aerogel as carrier as well as preparation method and application of methanation catalyst
  • Methanation catalyst taking TiO2 aerogel as carrier as well as preparation method and application of methanation catalyst
  • Methanation catalyst taking TiO2 aerogel as carrier as well as preparation method and application of methanation catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Mix 110ml of absolute ethanol and 8ml of deionized water evenly, add 48.4956g of tetrabutyl titanate dropwise, and mix evenly by ultrasonic to form a sol, and adjust the pH value of the sol to 2 with hydrochloric acid. After standing for a certain period of time, adjust the pH value of the sol to 8 with ammonia water, let it stand for a certain period of time, wash with absolute ethanol for 6 times, replace the water in the sol, and obtain TiO by supercritical drying. 2 Airgel carrier.

[0026] (2) Weigh 40.1318 grams of Ni (NO 3 ) 2 ·6H 2 O, 5.5209 g La(NO 3 ) 3 ·6H 2 O, 10.3014 g Zr(NO 3 ) 4 ·5H 2 O, 3.4161 g Ca(NO 3 ) 2 4H 2 O was dissolved in 300ml of absolute ethanol at 60°C to prepare an alcoholic solution.

[0027] (3) TiO obtained in step 1 2 The airgel carrier is soaked in the alcohol solution prepared in step 2, heated and stirred for 24 hours, then washed 6 times with absolute ethanol, dried in a blast oven at 60°C for 2 hours, and then the o...

Embodiment 2

[0030] (1) Mix 100ml of absolute ethanol and 15ml of deionized water evenly, add 68.0293g of tetrabutyl titanate dropwise, mix evenly by ultrasonic to form a sol, and adjust the pH value of the sol to 3.5 with hydrochloric acid. After standing for a certain period of time, adjust the pH value of the sol to 9 with ammonia water, let it age for a certain period of time, wash 6 times with absolute ethanol, replace the water in the sol, and obtain TiO by supercritical drying. 2 Airgel carrier.

[0031] (2) Weigh 43.1853 grams of Ni (NO 3 ) 2 ·6H 2 O, 11.8981 g Zr(NO 3 ) 4 ·5H 2 O and 4.5093 g Ca(NO 3 ) 2 4H 2 O was dissolved in 300ml of absolute ethanol at 50°C to prepare an alcoholic solution.

[0032](3) Soak the TiO2 airgel carrier obtained in step 1 in the alcohol solution prepared in step 2, heat and stir for 24 hours, then wash 6 times with absolute ethanol, dry in a blast oven at 60°C for 2 hours, and then dry the oven The temperature was raised to 110°C at a rate...

Embodiment 3

[0035] (1) Mix 170ml of absolute ethanol and 10ml of deionized water evenly, add 74.8322g of tetrabutyl titanate dropwise, mix evenly by ultrasonic to form a sol, and adjust the pH value of the sol to 2.5 with hydrochloric acid. After standing for a certain period of time, adjust the pH value of the sol to 7 with ammonia water, let it stand for a certain period of time, wash with absolute ethanol for 6 times, replace the water in the sol, and obtain TiO by supercritical drying. 2 Airgel as carrier.

[0036] (2) Weigh 58.8599 grams of Ni (NO 3 ) 2 ·6H 2 O, 8.1183 g Ce(NO 3 ) 3 ·6H 2 O, 15.1087 grams of Zr(NO 3 ) 4 ·5H 2 O and 5.4376 g Mg(NO 3 ) 2 ·6H2O was dissolved in 300ml of absolute ethanol at 70°C to obtain an alcoholic solution.

[0037] (3) TiO obtained in step 1 2 The airgel carrier was soaked in the alcohol solution prepared in step 2, heated and stirred for 24 hours, then washed 6 times with dehydrated ethanol, dried in a blast oven at 60°C for 2 hours, an...

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Abstract

The invention provides a methanation catalyst taking TiO2 aerogel as a carrier as well as a preparation method and application of the methanation catalyst. The methanation catalyst comprises an activecomponent Ni accounting for 3-60% of the total weight of the catalyst by elemental metal, a first auxiliary agent accounting for 2-30% of the total weight of the catalyst by oxide, a second auxiliaryagent accounting for 0.5-30% of the total weight of the catalyst by oxide, and the balance of the carrier TiO2 aerogel, wherein the first auxiliary agent is selected from one or more of La2O3, CeO2,Pr2O3 and Sm2O3, and the second auxiliary agent is selected from one or more of Fe2O3, Cr2O3, Co3O4, CuO, ZnO, MoO3, ZrO2, MgO, CaO, SrO and BaO. The methanation catalyst provided by the invention isimproved in low-temperature activity, has good thermal stability, and is suitable for being applied to a CO / CO2 methanation reaction process.

Description

technical field [0001] The invention belongs to the technical field of coal-to-natural gas, in particular to a TiO 2 Aerogel-supported methanation catalyst, its preparation method and application. The methanation catalyst is suitable for CO / CO 2 The methanation reaction belongs to the field of catalyst chemistry and coal-based synthetic natural gas new coal chemical energy. Background technique [0002] With the development of my country's economy and the improvement of social living standards, environmental protection has become an important issue of social development, and the market's demand for clean energy is increasing. Based on my country's resource endowment of "rich coal, poor oil, and little gas", my country's natural gas dependence on foreign countries exceeds 50%. In this context, the development of coal-based synthetic natural gas production technology and industry not only fills the supply gap in the traditional natural gas market, but also provides an optim...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J23/78B01J37/03B01J37/02B01J37/08B01J37/18B01J37/14C07C1/04C07C1/12C07C9/04
CPCB01J23/83B01J23/78B01J23/002B01J37/036B01J37/0201B01J37/082B01J37/088B01J37/18B01J37/14C07C1/0435C07C1/12B01J2523/00C07C2523/83C07C2523/78C07C9/04B01J2523/23B01J2523/3706B01J2523/47B01J2523/48B01J2523/847B01J2523/22B01J2523/3712
Inventor 于博文余铭程赵瑞同梅长松李春启
Owner DATANG INT CHEM TECH RESINST
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