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Preparation and application of catalyst with molecular sieve as carrier for hydrogen production by methane vapor reforming

A methane water vapor, reforming hydrogen production technology, applied in the field of catalysis, can solve the problems of limited application, and achieve the effects of improving interaction, inhibiting direct decomposition reaction of methane, and good stability

Inactive Publication Date: 2018-01-19
DALIAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most zeolite molecular sieves have strong acid centers on the surface, which limits their application in the hydrogen production reaction system of steam reforming of methane

Method used

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  • Preparation and application of catalyst with molecular sieve as carrier for hydrogen production by methane vapor reforming
  • Preparation and application of catalyst with molecular sieve as carrier for hydrogen production by methane vapor reforming
  • Preparation and application of catalyst with molecular sieve as carrier for hydrogen production by methane vapor reforming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1: Catalyst A

[0033] (1) Weigh 61.33g of water in a round-bottomed flask, then weigh 4.9029g of tetrapropylammonium hydroxide and slowly add it dropwise to the flask to form an aqueous solution, stir at 600r / min for 30min, and then rotate at 600r / min min. Slowly add 5.0895g of ethyl orthosilicate dropwise, and age for 24h.

[0034] (2) Transfer the gel system to a stainless steel reaction kettle with polytetrafluoroethylene, and perform two-stage hydrothermal crystallization. The first stage is hydrothermal crystallization at 140°C for 10 hours, and the second stage is at 175°C in an oven. Hydrothermal crystallization for 12 hours.

[0035] (3) The reaction product was centrifuged at 5000 r / min, dried at 110° C. for 12 hours, and calcined at 500° C. for 4 hours to obtain a molecular sieve carrier.

[0036] (4) This embodiment is to prepare a catalyst with a loading capacity of 10wt% NiO, that is, the mass fraction of NiO accounts for 10% of the total mas...

Embodiment 2

[0042] Example 2: Catalyst B

[0043] (1) Weigh 0.6838gZr(NO 3 ) 4 ·5H 2O and 61.33g of water were prepared into an aqueous solution, and then 4.9029g of tetrapropylammonium hydroxide was weighed and added dropwise to a round-bottomed flask, stirred at 1200r / min for 30min, after which the rotation speed was 1200r / min, and orthosilicon was slowly added dropwise Acetate ethyl 5.0895g, aged for 24h.

[0044] (2) The gel system was transferred to a stainless steel reactor with polytetrafluoroethylene, hydrothermally crystallized at 140°C for 10 hours, and then placed in an oven for hydrothermally crystallized at 175°C overnight.

[0045] (3) The reaction product was centrifuged at 5000 r / min, dried at 110° C. for 12 hours, and calcined at 500° C. for 4 hours to obtain a molecular sieve carrier.

[0046] (4) Weigh 0.4368g Ni(NO 3 ) 2 ·6H 2 O, add deionized water to dissolve, and prepare a 1.66mol / L nickel nitrate solution.

[0047] (5) Weigh 1 g of the molecular sieve carri...

Embodiment 3

[0052] Example 3: Catalyst B

[0053] (1) Weigh 0.6843gZr(NO 3 ) 4 ·5H 2 0 and 61.33g water are mixed with an aqueous solution, then take by weighing 2.5012g tetrapropylammonium hydroxide and 2.4830g tetraethylammonium hydroxide, and the two are mixed and added dropwise to 2000r / min in the round bottom flask and stirred for 30min, then The rotation speed of each was 2000r / min, and 5.0890g of ethyl orthosilicate was slowly added dropwise, and aged for 24h.

[0054] (2) The gel system was transferred to a stainless steel reactor with polytetrafluoroethylene, hydrothermally crystallized at 150°C for 12 hours, and then placed in an oven for 5h at 175°C.

[0055] (3) The reaction product was centrifuged at 5000 r / min, dried at 110° C. for 12 hours, and calcined at 500° C. for 4 hours to obtain a molecular sieve carrier.

[0056] (4) Weigh 0.4364gNi(NO 3 ) 2 ·6H 2 O, add deionized water to dissolve, and prepare a 1.66mol / L nickel nitrate solution.

[0057] (5) Weigh 1 g of t...

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PUM

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Abstract

The invention belongs to the technical field of catalyzation, and particularly relates to the preparation and application of a catalyst with molecular sieve as a carrier for hydrogen production by methane vapor reforming. The catalyst consists of an active component, an additive and the carrier; one or two metal oxide of iron, cobalt and nickel is chosen as the active component, one or two metal oxide of zirconium and cerium is chosen as the additive, and a nanoscale pure-silica molecular sieve prepared by a hydrothermal synthesis method is chosen as the carrier. The catalyst with the molecular sieve as the carrier for hydrogen production by methane vapor reforming provided by the invention has high activity and good stability on reaction for hydrogen production by catalytic reforming of methane vapor under high temperature, moreover, a catalyst preparation method is simple, and the catalyst can be industrially mass-produced.

Description

technical field [0001] The invention belongs to the technical field of catalysis, and in particular relates to the preparation and application of a catalyst for hydrogen production by steam reforming of methane. Background technique [0002] With the increasing problems of environmental pollution and energy crisis, it is imminent to find a clean and efficient energy that can replace fossil energy. Hydrogen has the advantages of non-pollution and high efficiency. It is an ideal choice for clean energy carriers in the 21st century, and it is also one of the ideal ways to replace fossil fuels to solve the energy crisis. So far, the main ways to produce hydrogen are: reforming of hydrocarbons, catalytic conversion of biomass, electrolysis of water and photolysis of hydrogen. Hydrocarbon reforming hydrogen production is currently the most experienced and widely used hydrogen production method. Methane, as the alkane with the highest hydrogen content and has the characteristics ...

Claims

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Application Information

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IPC IPC(8): B01J29/00C01B3/40
Inventor 潘立卫魏宁张晶周毅毕怡
Owner DALIAN UNIVERSITY
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