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Novel nickel-based LPG water vapor reforming catalyst and preparation method thereof

A technology of steam reforming and catalyst, applied in chemical instruments and methods, inorganic chemistry, bulk chemical production, etc., can solve problems such as catalyst deactivation

Inactive Publication Date: 2011-07-27
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at high temperature, Ni / Al 2 o 3 Catalysts are easily deactivated by carbon deposition and sintering of Ni particles

Method used

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  • Novel nickel-based LPG water vapor reforming catalyst and preparation method thereof
  • Novel nickel-based LPG water vapor reforming catalyst and preparation method thereof
  • Novel nickel-based LPG water vapor reforming catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] According to the molar ratio n(Mg):n(Al) =0.5:1, weigh 87.5 g Al(NO 3 ) 3 9H 2 O and 29.9 g Mg(NO 3 ) 2 ·6H 2 O was dissolved in 120 mL deionized water. At the same time, the preparation of Na 2 CO 3 (1 M) and NaOH (2 M) as a precipitant. Slowly drop the above alkaline precipitant aqueous solution into a beaker with a stirring device containing a mixed aqueous solution of metal cations for reaction; the stirring speed is 160 rpm, and the precipitation reaction is carried out at room temperature 60 ° C. After the precipitation reaction, keep the mixed solution The pH value is around 9.5 and aged at 60°C for 2 hours with stirring, the resulting precipitate is washed several times, and filtered at 110 o Dry overnight in a C drying oven; then grind into fine powder, and bake in a muffle furnace at 800° C. for 20 hours to obtain a magnesium-aluminum composite oxide carrier. Weigh 4.5g of magnesium-aluminum composite oxide carrier and impregnate it into 3 ) 2 .6H ...

Embodiment 2

[0021] According to the method in Example 1, by adding different masses of Mg(NO 3 ) 2 ·6H 2 O and Al(NO 3 ) 3 9H 2 O to prepare Ni / Mg with different Mg / Al molar ratios x(Al) catalyst (see Table 1). At the same time, in order to investigate the effect of different nickel content on the catalytic performance of the catalyst, a series of Ni / Mg with different nickel content were prepared under the fixed Mg / Al ratio of 1.25. 1.25 (Al) catalyst (see Table 1). At the same time, Table 1 also lists the specific surface, pore volume, pore diameter and actual Mg / Al ratio of different catalysts.

[0022]

[0023] a Measured by SEM.

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Abstract

The invention relates to a novel nickel-based liquefied petroleum gas (LPG) water vapor reforming catalyst and a preparation method thereof, and belongs to the technical field of catalyst preparation processes. The LPG water vapor reforming catalyst consists of oxides of nickel, magnesium and aluminum. The LPG water vapor reforming catalyst is characterized in that: the nickel content is 5 to 20 weight percent, and the molar ratio of the magnesium to the aluminum is 0.5-2:1. The preparation method comprises the following steps of: titrating soluble magnesium nitrate and aluminum nitrate to obtain sediment by using alkali liquor; performing suction-filtration, washing, drying and baking the sediment to obtain a magnesium aluminum composite oxide carrier; and loading a certain amount of nickel on the obtained carrier by an immersion method, and drying and baking the carrier again to obtain a finished catalyst product. The prepared catalyst has the advantages of high catalytic activity, wide usage temperature, good catalytic stability, high mechanical strength, low production cost and the like. The life experiment results show that the preferable 15 weight percent Ni / Mg1.25 (Al) catalyst is a potential LPG water vapor reforming catalyst.

Description

technical field [0001] The invention discloses a novel nickel-based LPG steam reforming catalyst and a preparation method thereof, belonging to the technical field of catalyst preparation technology. Background technique [0002] LPG, gasoline, and diesel have the advantages of high combustion calorific value, high energy density, stable market source, convenient storage and transportation, and a mature commercial distribution network. They are used to develop on-board hydrogen production for fuel cell vehicles and have huge potential commercial value. Hydrocarbon steam reforming method is currently the most widely used hydrogen production method. Steam reforming reaction is a slow reaction. In order to maintain a high production rate, the pressure in industrial production is usually higher than 3.0 MPa. Coke deposits have adverse effects on the catalyst's activity, life, and mechanical strength. To prevent carbon deposits, excessive water vapor (S / C = 3-5) must be introduce...

Claims

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Application Information

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IPC IPC(8): B01J23/78C01B3/40
CPCY02P20/52
Inventor 丁伟中沈葵汪学广王新星刘和之尚兴付
Owner SHANGHAI UNIV
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