Method for hydrogen production through methanol reforming by using Pd/ZnFexAl<2-x>O4 catalyst

A technology for reforming hydrogen production and catalysts, which is applied in metal/metal oxide/metal hydroxide catalysts, catalyst activation/preparation, physical/chemical process catalysts, etc. It can solve the problems of easy spontaneous combustion and easy deactivation, and achieve Economical cost saving, simple hydrogen production method, and portable hydrogen production effect

Inactive Publication Date: 2021-10-08
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the catalysts of MSR are mainly Cu-based catalysts, although Cu-based catalysts have high CO 2 And high economic benefits and other advantages, but Cu itself has inherent defects, such as easy spontaneous combustion and high temperature deactivation and other shortcomings

Method used

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  • Method for hydrogen production through methanol reforming by using Pd/ZnFexAl&lt;2-x&gt;O4 catalyst
  • Method for hydrogen production through methanol reforming by using Pd/ZnFexAl&lt;2-x&gt;O4 catalyst
  • Method for hydrogen production through methanol reforming by using Pd/ZnFexAl&lt;2-x&gt;O4 catalyst

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Experimental program
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Effect test

Embodiment 1

[0047] PdZn / ZnFe with a Pd mass fraction of 0.1 wt.% 0.05 Al 1.95 O 4 The specific method of catalyst catalyzing methanol steam reforming to produce hydrogen is as follows:

[0048] 1) Add 5.95g of zinc nitrate, 0.4g of ferric nitrate and 13.5g of aluminum trichloride to 100ml of isopropanol, hydrothermally react at 180°C for 10h, and roast the obtained solid at 800°C for 4h to obtain metal iron ion doped ZnFe 0.05 Al 1.95 O 4 Spinel carrier;

[0049] 2) Take 0.0025g Pd(NO 3 ) 2 ·2H 2 The O precursor was placed in a 5 mL sample tube, and was dissolved with a volume ratio of 1:3 nitric acid aqueous solution (0.4 mL) to obtain Pd(NO 3 ) 2 solution; then weigh 1g of ZnFe 0.05 Al 1.95 O 4 The carrier was placed in a 100mL beaker, and it was immersed into Pd(NO) in an equal amount at room temperature. 3 ) 2 In the solution, after filtration, the obtained solid was placed in an oven at 100 °C to dry overnight, and finally the dried solid was calcined at 400 °C for 3 h...

Embodiment 2

[0053]PdZn / ZnFe with a Pd mass fraction of 0.1 wt.% 0.1 Al 1.9 O 4 The specific method of catalyst catalyzing methanol steam reforming for hydrogen production refers to Example 1, the difference is: the consumption of ferric nitrate in step 1) becomes 0.8g; the remaining steps are the same as in Example 1; the reaction results are shown in Table 1: methanol conversion The yield was 36.25%, while the selectivity to CO by-product was 2.38%.

Embodiment 3

[0055] PdZn / ZnFe with a Pd mass fraction of 0.1 wt.% 0.2 Al 1.8 O 4 The specific method of catalyst catalyzing methanol steam reforming to produce hydrogen is with reference to Example 1, and the difference is: the consumption of ferric nitrate in step 1) becomes 1.6 g; the remaining steps are the same as in Example 1; the reaction results are shown in Table 1: methanol conversion The yield was 25.67%, while the selectivity to CO by-product was 2.17%.

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Abstract

The invention discloses a method for hydrogen production by methanol steam reforming by using a Pd/ZnFexAl<2-x>O4 catalyst, and belongs to the field of hydrogen production by methanol. The method comprises the steps of 1) adding a zinc salt, a doped metal ion salt and an aluminum salt into isopropanol, and carrying out a hydrothermal reaction to prepare a ZnMxAl<2-x>O4 spinel carrier; 2) loading a noble metal Pd salt onto the ZnMxAl<2-x>O4 carrier by a dipping method or a sol-gel method and the like; (3) carrying out reduction treatment on the PdZn/ZnMxAl<2-x>O4 catalyst in an H2 atmosphere; and 4) adding the catalyst treated by H2 into a methanol aqueous solution to carry out hydrogen production reaction at the reaction temperature of 150-300 DEG C and the reaction pressure of normal pressure. Results show that the Pd/ZnFexAl<2-x>O4 catalyst with low Pd content (less than 0.5 wt%) can realize hydrogen production by methanol reforming, and the selectivity of a byproduct CO is consistent with that of other traditional PdZn/ZnO and PdZn/ZnO/Al2O3-based catalysts with high Pd content (greater than 5%), so that the production cost can be greatly saved, and the method has great economic benefits. In addition, the hydrogen production method disclosed by the invention also has the advantages of simplicity in operation, capability of realizing portable hydrogen production and the like.

Description

technical field [0001] The invention belongs to the field of methanol hydrogen production, and in particular relates to a Pd / ZnFe x Al 2-x O 4 A catalyst is used in a method for methanol reforming to produce hydrogen. Background technique [0002] Hydrogen fuel is considered as a new generation of clean energy to solve the increasingly serious energy crisis and environmental pollution due to its high energy density and low emissions. [1-4] . Hydrogen can be widely used in chemical, metallurgical and electric power industries, and can also be used as reducing gas, raw material gas and fuel cell fuel. Especially in the application of fuel cells, it has received more and more attention in recent years [5-8] . Fuel cells have the advantages of high energy conversion efficiency and low emissions. They have great application prospects in industries such as transportation and stationary power generation. They are also one of the current research hotspots and development direc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B01J37/02B01J37/08B01J37/10B01J37/18C01B3/32
CPCB01J23/8953B01J23/005B01J37/10B01J37/0201B01J37/088B01J37/18C01B3/326B01J2523/00C01B2203/0233C01B2203/107C01B2203/1082B01J2523/27B01J2523/31B01J2523/842
Inventor 万绍隆
Owner XIAMEN UNIV
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