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A preparing method and an application of a LaPrFeNi<x>Co<1-x>O6 double-perovskite catalyst for hydrogen production by bioethanol reforming

A double perovskite and bioethanol technology, applied in the direction of physical/chemical process catalysts, heterogeneous catalyst chemical elements, chemical instruments and methods, etc., can solve the problems of low and difficult hydrogen selectivity, and achieve high hydrogen selectivity sexual effect

Inactive Publication Date: 2017-04-19
GUANGDONG UNIV OF PETROCHEMICAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Hydrogen production by steam reforming of ethanol has high hydrogen selectivity, but this reaction is a strong endothermic reaction, even in the presence of a catalyst, usually requires a reaction temperature of 450-700 ° C; partial oxidation of ethanol is a strong exothermic reaction Thermal reaction can be carried out at a lower temperature, but the selectivity of hydrogen is low, and the problem of "hot spot" caused by heat release is difficult to solve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] 1) LaPrFeNi x Co 1-x O 6 Preparation of double perovskite catalyst: Weigh La(NO) according to the ratio of metal ion molar ratio of 1:1:1:0.9:0.1 3 ) 3 ·6H 2 O, Pr(NO 3 ) 3 ·6H 2 O, Fe(NO 3 ) 3 ·9H 2 O, Ni(NO 3 ) 2 ·6H 2 O, Co(NO 3 ) 2 ·6H 2 O respectively 4.33, 4.35, 4.04, 2.62 and 0.29g, and dissolve it in 150mL ionized water, at the same time add polyethylene glycol (molecular weight 2000) 0.47g, stir and heat, after uniform, add ammonia water dropwise to adjust the pH of the solution = 7-8, and keep the pH of the solution unchanged. The reaction time is 4h. After the reaction is completed, the precipitate is sealed and allowed to stand for 24h, filtered and washed with suction. After being dried at 120°C for 12 hours, it is placed in a high-temperature furnace and baked at 800°C for 5 hours in an air atmosphere.

[0023] 2) Catalyst application and process conditions: weigh 0.1 gLaPrFeNi 0.9 Co 0.1 O 6 Double perovskite catalyst. Use WFS-2015 online reaction chromatogr...

Embodiment 2

[0025] 1) LaPrFeNi x Co 1-x O 6 Preparation of double perovskite catalyst: Weigh La(NO) at the ratio of 1:1:1:0.86:0.14 to the molar ratio of metal ions. 3 ) 3 ·6H 2 O, Pr(NO 3 ) 3 ·6H 2 O, Fe(NO 3 ) 3 ·9H 2 O, Ni(NO 3 ) 2 ·6H 2 O, Co(NO 3 ) 2 ·6H 2 O respectively 4.33, 4.35, 4.04, 2.50 and 0.40g, and dissolve it in 150mL ionized water, at the same time add polyethylene glycol (molecular weight 2000) 0.62g, stir and heat, after uniform, add ammonia water dropwise to adjust the pH of the solution = 7-8, and keep the pH of the solution unchanged. The reaction time is 4h. After the reaction is completed, the precipitate is sealed and allowed to stand for 24h, filtered and washed with suction. After being dried at 120°C for 12 hours, it is placed in a high-temperature furnace and baked at 800°C for 5 hours in an air atmosphere.

[0026] 2) Catalyst application and process conditions: weigh 0.1 gLaPrFeNi 0.86 Co 0.14 O 6 Double perovskite catalyst. Use WFS-2015 online reaction chromat...

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Abstract

The invention relates to a preparing method and an application of a LaPrFeNi<x>Co<1-x>O6 double-perovskite catalyst for hydrogen production by bioethanol reforming, and belongs to the technical field of catalysts. The method and the application are characterized in that the method includes steps of 1) preparing a LaPrFeNi<x>Co<1-x>O6 double-perovskite catalyst; 2) the catalyst is used in a fixed-bed reactor; and optimized process conditions of the catalyst in hydrogen production by bioethanol reforming are that the reaction temperature is 395-420 DEG C, the pressure is atmospheric pressure, and the sample injection flux of biomethanol is 0.1-0.16 mL / min. The specific surface area of the LaPrFeNi<x>Co<1-x>O6 is 15.72-18.62 m<2> / g, the average pore size is 8.89-11.76 nm, the ethanol conversion rate is 96.62-98.45%, and hydrogen selectivity is 84.56-87.32%.

Description

Technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a LaPrFeNi hydrogen production by reforming bioethanol x Co 1-x O 6 Preparation method and application of double perovskite catalyst. Background technique [0002] Energy and environment have become two hot issues related to the sustainable development of human society. With the continuous advancement of the modernization of human society, the contradiction between dependence on energy and the ever-draining of fossil energy is increasing. Large amounts of pollutants and CO are emitted during energy production and use 2 Such greenhouse gases are one of the causes of important air pollution sources. Looking for a clean, renewable and CO 2 Alternative energy sources with low net emissions have become an urgent need for the development of human society. [0003] Bioethanol is a renewable biomass resource and will not emit additional CO to the natural carbon cycle during production and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C01B3/32
CPCB01J23/002B01J23/83B01J2523/00C01B3/326B01J2523/3706B01J2523/3718B01J2523/842B01J2523/845B01J2523/847
Inventor 李凝滕俊江李威陈彧
Owner GUANGDONG UNIV OF PETROCHEMICAL TECH
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