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Method for improving catalytic hydrogen production performance of copper-based catalyst

A technology of copper-based catalysts and performance, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problems of synergy between catalyst acid function and reforming function, high price level of dual-function catalysts, etc. , to achieve the effect of low material price, simple method and shortened pitch

Pending Publication Date: 2022-07-29
LIAONING UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the bifunctional catalyst is prepared by physical mixing, the acid function and reforming function of the catalyst cannot play a synergistic effect well. In addition, the commercialized Cu / ZnO / Al 2 o 3 The price of the catalyst is relatively expensive, so that the price of the entire dual-function catalyst is still at a relatively high level

Method used

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  • Method for improving catalytic hydrogen production performance of copper-based catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] 1. Preparation of acid-activated montmorillonite

[0048] Disperse 6 g of montmorillonite in 294 g of nitric acid solution with a mass fraction of 20%, stir in an oil bath at 80 °C for 12 hours, and then use multiple centrifugations to wash the solution to neutrality, and then centrifuge the solid. Put it in an oven at 100°C to dry to constant weight, then grind the dried solid into powder, put it into a muffle furnace, and heat it up to 550°C for 4 hours at a heating rate of 5°C / min to obtain acid-activated montmorillonite. earth.

[0049] 2. Preparation of acid-activated montmorillonite supported copper-based catalyst

[0050] Using the excessive impregnation method, according to the loading of metal Cu as 10% of the mass of the carrier, 0.5875 g of copper nitrate was dissolved in 20 g of water, 2 g of acid-activated montmorillonite was added to it, stirred for 30 minutes, ultrasonicated for 30 minutes, and aged at room temperature After 12 hours, the excess water w...

Embodiment 2

[0052] In step 2 of preparing acid-activated montmorillonite-supported copper-based catalyst in Example 1, 0.2938 g of copper nitrate was dissolved in 20 g of water, and 2 g of acid-activated montmorillonite was added to it. Other steps in this step were the same as those in Example 1. Similarly, an acid-activated montmorillonite-supported copper-based catalyst was prepared, wherein the loading of Cu was 5% of the mass of the support. The catalyst was used according to the method of use, and the reaction results are shown in Table 1.

Embodiment 3

[0054] In step 2 of preparing acid-activated montmorillonite-supported copper-based catalyst in Example 1, 0.8813 g of copper nitrate was dissolved in 20 g of water, and 2 g of acid-activated montmorillonite was added to it. Other steps in this step were the same as those in Example 1. In the same way, an acid-activated montmorillonite-supported copper-based catalyst was prepared, wherein the loading of Cu was 15% of the mass of the support. The catalyst was used according to the method of use, and the reaction results are shown in Table 1.

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Abstract

The invention relates to an acid activated montmorillonite supported copper-based catalyst, which takes acid activated montmorillonite as a carrier, an active component is metal copper, and metal additives are Ni, Co, Ce, Zr, La, Fe and V. The specific surface area of the acid activated montmorillonite is 356.93 m < 2 > / g, the pore volume is 0.56 cm < 3 > / g, the pore diameter is 6.24 mm, the loading capacity of the metal copper is 5-10%, the loading capacity of the metal additive is 3-10%, the specific surface area of the Cu-loaded montmorillonite-based catalyst is 214.19-334.06 m < 2 > / g, the pore volume is 0.35-0.52 cm < 3 > / g, and the pore diameter distribution is 5.94-6.58 mm. According to the invention, after montmorillonite is subjected to acid activation treatment, copper and other metal additives are loaded by using an excessive impregnation method, and after the metal additives are added, compared with a catalyst independently loaded with metal copper, the reaction performance of the catalyst is obviously improved, and the dimethyl ether conversion rate and the hydrogen yield are obviously increased; the addition of the metal additive is an effective method for improving the hydrogen production performance of the copper-based catalyst.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a catalyst for selectively controlling the steam reforming of dimethyl ether to produce hydrogen. Background technique [0002] In recent years, due to the depletion of fossil raw materials and environmental pollution, people attach great importance to the development of new energy. Among all the alternative energy sources, hydrogen energy has attracted more and more attention as a clean energy with development potential due to its high energy density and environmental advantages. [0003] Hydrogen production from alcohols, hydrocarbons and ethers is considered to be one of the most realistic solutions for hydrogen energy, such as the production of hydrogen from methane, methanol and ethanol. However, the above substances have certain defects in the process of hydrogen production. For example, the production of hydrogen from methane and ethanol requires a higher re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72B01J23/75B01J23/755B01J37/02C01B3/32
CPCB01J37/0207B01J23/72B01J23/75B01J23/755C01B3/326C01B2203/0233Y02P20/52
Inventor 赵永华张森晗张启俭罗洪旭王欢齐平张家慷
Owner LIAONING UNIVERSITY OF TECHNOLOGY
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