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Catalyst containing trace noble metals for dehydrogenating organic hydrogen storage medium and preparation method

A catalyst and precious metal technology, applied in the field of composite catalyst and preparation of organic liquid hydrogen storage medium dehydrogenation, can solve the problem of low selectivity, and achieve the effects of improving catalytic activity, reducing cost and reducing dosage

Inactive Publication Date: 2010-07-28
淮安市淮安区综合检验检测中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some researchers also use iron-containing catalysts to catalyze the dehydrogenation of cyclohexane. For example, when using Egyptian iron (EgyFe) mixed with 20% activated bentonite clay (bentonite clay) as a catalyst, at 500 ° C, the maximum conversion rate is only 28%. Left and right, and the reaction is accompanied by many side reactions such as cracking, isomerization, etc., and the selectivity is not high (Zaki T.Petrol.Sci.Technol., 2005, 23(9-10): 1163-1181)

Method used

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  • Catalyst containing trace noble metals for dehydrogenating organic hydrogen storage medium and preparation method
  • Catalyst containing trace noble metals for dehydrogenating organic hydrogen storage medium and preparation method
  • Catalyst containing trace noble metals for dehydrogenating organic hydrogen storage medium and preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] a. 2.9g nickel acetate Ni(AC) 2 .4H 2 O and 0.43g lanthanum nitrate La(NO 3 ) 3 .6H 2 O was dissolved in 4.0ml of deionized water, 2.0ml of ethanol and 1.0ml of glacial acetic acid; then weighed 6.0g of activated carbon desorbed under vacuum at 120°C and added to the above mixed solution. The above mixture was dispersed under ultrasound for at least 20 minutes, left to stand for 48 hours, and then dried with a rotary evaporator, calcined at 400°C for 3 hours under nitrogen protection, and cooled to room temperature to obtain the catalyst precursor A1.

[0036] b. With 0.012g copper nitrate Cu(NO 3 ) 2 .3H 2 O and 0.60g of activated carbon were dissolved in 4.0ml of deionized water, 2.0ml of ethanol and 1.0ml of glacial acetic acid; the same ultrasonic dispersion, evaporative drying and calcination process as in step a was adopted, wherein the calcination temperature was 380°C and cooled to room temperature to obtain Cu-containing catalyst precursor B1.

[0037] ...

Embodiment 2

[0043] a. 2.8g nickel acetate Ni(AC) 2 .4H 2 O and 0.20g lanthanum nitrate La(NO 3 ) 3 .6H 2 O was dissolved in 4.0ml of deionized water, 2.0ml of ethanol and 0.8ml of glacial acetic acid; then weighed 6.0g of activated carbon after vacuum desorption and added to the above mixed solution. The above mixture was left to stand for 48 hours, dried with a rotary evaporator, calcined at 400° C. for 3 hours under nitrogen protection, and cooled to room temperature to obtain catalyst precursor A2.

[0044] b. With 0.0060g copper nitrate Cu(NO 3 ) 2 .3H 2 O and 0.60g of activated carbon were dissolved in 4.0ml of deionized water, 2.0ml of ethanol and 1.0ml of glacial acetic acid; using the same ultrasonic dispersion, evaporative drying and calcination process as in step a, wherein the calcination temperature was 400°C and cooled to room temperature to obtain Cu-containing catalyst precursor B2.

[0045] c. Mix the precursors A2 and B2, and then use the temperature-programmed re...

Embodiment 3

[0050] a. 1.64g nickel chloride NiCl 2 .6H 2 O and 0.09 g lanthanum chloride LaCl 3 .6H 2 O was dissolved in 4.0ml of deionized water, 2.0ml of ethanol and 0.8ml of glacial acetic acid; then weighed 6.0g of activated carbon after vacuum desorption and added to the above mixed solution. The above mixture was dispersed under ultrasound for 30 min, left to stand for 48 hours, dried with a rotary evaporator, calcined at 400° C. for 3 hours under nitrogen protection, and cooled to room temperature to obtain catalyst precursor A3.

[0051] b. With 0.11g copper chloride CuCl 2 .2H 2 O and 0.60g of activated carbon were dissolved in 4.0ml of deionized water, 2.0ml of ethanol and 1.0ml of glacial acetic acid; the same ultrasonic dispersion, evaporative drying and calcination process as in step a was adopted, wherein the calcination temperature was 450°C and cooled to room temperature to obtain Cu-containing catalyst precursor B3.

[0052] c. Mix the precursors A3 and B3, and then...

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Abstract

The invention relates to a catalyst containing trace noble metals for dehydrogenating an organic hydrogen storage medium and a preparation method. The catalyst comprises 5-15% of Ni, 0.5-4% of La, 0.01-0.1% of Pt, 0.02-1% of Cu and the balance of carrier active carbon of which the specific surface area is between 100m<2> / g and 1800m<2> / g. The preparation method comprises the following steps of: firstly using processed active carbon as a carrier, using a relevant soluble salt to carry metals, such as the Ni, the La, the Pt, the Cu and the like, then drying and calcining for 3-5h at 300-500 DEGC under the protection of nitrogen gas to prepare the precursor of the catalyst, and finally performing temperature programmed reduction. In the preparation process, by properly proportioning all components and by adopting a combined strategy of alternately using chemical mixing and physical mixing, a multi-component composite catalyst is finally obtained. Therefore, the excellent synergistic catalysis is generated among all components to improve dehydrogenation catalytic activity under the condition that the noble metals are used as few as possible.

Description

technical field [0001] The invention relates to a catalyst and preparation technology, in particular to a composite catalyst containing a trace amount of precious metal used for dehydrogenation of an organic liquid hydrogen storage medium and a preparation method. Background technique [0002] As a green energy with abundant reserves, wide sources and high energy density, hydrogen energy has shown good application prospects in fuel cells and replacing fossil fuels. In the utilization process, its storage and transportation are the key. In recent years, the liquid organic hydride hydrogen storage technology based on the chemical reaction method has attracted the attention of many countries due to its large hydrogen storage capacity, high energy density, safe and convenient liquid storage and transportation, and is expected to play an important role in the future hydrogen energy storage and transportation. [0003] Unsaturated aromatics and corresponding hydrides (cycloalkane...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89C01B3/26
Inventor 杨伯伦朱刚利
Owner 淮安市淮安区综合检验检测中心
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