Catalyst for hydrogen production by ethanol steam reforming and preparation method of catalyst

A steam reforming and catalyst technology, applied in chemical instruments and methods, hydrogen, inorganic chemistry, etc., can solve problems that need to be improved urgently, achieve selectivity and operational stability and stability, less by-products, and good repeatability Effect

Inactive Publication Date: 2015-12-30
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, from a practical point of view, the activity of Ni or Co-based catalysts, especially their operational stability (service life) still needs to be improved urgently.

Method used

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  • Catalyst for hydrogen production by ethanol steam reforming and preparation method of catalyst
  • Catalyst for hydrogen production by ethanol steam reforming and preparation method of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Mix 7.27g of nickel nitrate, 7.86g of zirconium nitrate and 7.47g of ytterbium nitrate (all of which are of AR grade), and add 100mL of deionized water to make solution A; another 12.30g (AR grade) of anhydrous K 2 CO 3 Dissolve in 100 mL deionized water to make solution B. At a temperature of 80°C, simultaneously inject solution A and solution B into a 500mL beaker preloaded with 200mL deionized water (injection rate is about 18mL / min), and carry out co-precipitation reaction at a constant temperature of 80°C and constant stirring. The pH value of the precipitation solution is maintained at 7-8 by adjusting the addition amount of solution A and solution B. After the addition, continue to stir for 30 minutes, then filter the feed liquid, the obtained precipitate is washed with deionized water several times and then filtered, the obtained solid is dried at 110°C for 10 hours, and roasted at 400°C for 4 hours to obtain the ethanol water to be prepared Steam reforming ca...

Embodiment 2

[0031] Mix 5.82g of cobalt nitrate, 2.97g of zinc nitrate and 1.02g of scandium nitrate (all of which are of AR grade), and add 100mL of deionized water to make solution A; another 4.77g (AR grade) of anhydrous K 2 CO 3 Dissolve in 100 mL deionized water to make solution B. At a temperature of 80°C, simultaneously inject solution A and solution B into a 500mL beaker preloaded with 200mL deionized water (injection rate is about 25mL / min), and carry out co-precipitation reaction at a constant temperature of 80°C and constant stirring. The pH value of the precipitation solution is maintained at 7-8 by adjusting the addition amount of solution A and solution B. After the addition, continue to stir for 30 minutes, and then filter the feed liquid. The obtained precipitate is washed with deionized water several times and then filtered. The obtained solid is dried at 110°C for 12 hours, and roasted at 350°C for 2 hours to obtain the ethanol water to be prepared. Steam reforming cata...

Embodiment 3

[0034] Keep the catalyst and activity evaluation experimental device in Example 2. The evaluation results show that at 0.5MPa and 450°C, the feed gas composition is CH 3 CH 2 OH / H 2 O / N 2 =10 / 30 / 60 (molar ratio), under the reaction conditions of space velocity GHSV=150000mL / (h g), the conversion rate of ethanol and the corresponding H 2 The space-time yields reached 22.0% and 0.909mol / (h g), respectively, CO 2 , CO and CH 4 The selectivities are 81.9%, 8.9% and 9.2%, respectively.

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PUM

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Abstract

The invention discloses a catalyst for hydrogen production by ethanol steam reforming and a preparation method of the catalyst and relates to catalysts. The catalyst comprises active metal, a carrier accelerant and an auxiliary, wherein the weight percentage of the active metal to the carrier accelerant to the auxiliary is (15%-75%) to (10%-50%) to (5%-60%). The catalyst is prepared by adopting coprecipitation reaction; the activity, the selectivity and the operation stabilization of the catalyst are high and stable; under an optimized optimum reaction condition, the conversion rate of ethyl alcohol and the space time yield of H2 in products can be up to 19.1% and 1.151mol/(h.g); by-products are relatively few; the operation period and the service life of the catalyst are obviously better than those of existing similar or related catalysts. The catalyst is easy and convenient to prepare and good in repeatability.

Description

technical field [0001] The invention relates to a catalyst, in particular to a catalyst for hydrogen production by steam reforming of ethanol and a preparation method thereof. Background technique [0002] In recent years, people's demand for energy has increased year by year and CO 2 The environmental problems caused by massive emissions have led to the birth of new energy sources. Alcohols (mainly methanol and ethanol) are steam reformed to produce H 2 Hydrogen is of increasing interest as an energy source, especially as a fuel for on-board hydrogen fuel cells. One of the advantages of this technical route is that it can avoid large quantities of H 2 The hassle of storing and distributing. Methanol as the raw material of the on-board hydrogen production system has the advantages of low reaction temperature and pressure, high H / C ratio, and no NO x , SO x emissions, and can be applied to the existing power fuel transmission and distribution system, so it has been paid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83C01B3/32
Inventor 梁雪莲袁友珠
Owner XIAMEN UNIV
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