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A chemical chain hydrogen production composite oxygen carrier with anti-carbon deposition properties and preparation method thereof

A chemical chain and anti-carbon deposition technology, applied in chemical instruments and methods, catalyst activation/preparation, chemical/physical processes, etc., can solve the problems of low hydrogen purity, slow reaction speed, and poor hydrogen production effect, and achieve reactivity High, easy to control the process, and the effect of inhibiting carbon deposition

Active Publication Date: 2017-09-15
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Fe in iron ore 2 o 3 The reduction depth directly affects the yield and purity of hydrogen production, but is limited by the kinetics of the chemical reaction, the deep reduction process Fe 3 o 4 The reaction rate of conversion to FeO or Fe is slow, resulting in poor subsequent hydrogen production
And the greater the reduction depth, the carbon-containing gas fuel will produce serious carbon deposition, and adhere to the surface of the oxygen carrier, and react with water vapor during the hydrogen production process, resulting in low purity hydrogen, which is mixed with CO, CO 2

Method used

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  • A chemical chain hydrogen production composite oxygen carrier with anti-carbon deposition properties and preparation method thereof
  • A chemical chain hydrogen production composite oxygen carrier with anti-carbon deposition properties and preparation method thereof
  • A chemical chain hydrogen production composite oxygen carrier with anti-carbon deposition properties and preparation method thereof

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preparation example Construction

[0030] The preparation method specifically comprises the following steps:

[0031] (1) Crushing and screening: first crush the iron ore with a crusher, and screen out iron ore particles with a particle size range of 0.2-0.45mm;

[0032] (2) Solution preparation: prepare Cu(NO 3 ) 2 ·3H 2 O solution and KNO 3 solution, and stir it with a glass rod to make it evenly mixed;

[0033](3) Vacuum treatment: Add the iron ore obtained in step (1) into a jar with a rubber stopper, use a vacuum pump to vacuumize, and the vacuum degree is -0.1MPa. After a period of time, add the iron ore produced by Continue to vacuumize the mixed solution prepared in step (2) for 1-2 hours;

[0034] (4) Immersion treatment: the suspension obtained in step (3) was sealed and left for 20 hours, and Cu(NO 3 ) 2 ·3H 2 O solution and KNO 3 Impregnation of iron ore by solution;

[0035] (5) Drying treatment: after the mixture obtained in step (4) is dried in a water bath at a water bath temperature o...

Embodiment 1

[0047] The method for preparing a composite oxygen carrier for chemical chain hydrogen production from iron ore specifically includes the following steps:

[0048] (1) Crushing and screening: first, the iron ore is crushed with a crusher, and the iron ore particles with a particle size range of 0.2-0.45 mm are screened out. The main components of the iron ore are shown in Table 1;

[0049] (2) Solution preparation: 50g Cu(NO 3 ) 2 ·3H 2 O crystals were dissolved in an appropriate amount of deionized water to prepare Cu(NO 3 ) 2 ·3H 2 O solution. 16.67g KNO 3 The powder is dissolved in an appropriate amount of deionized water to prepare KNO 3 solution. The prepared Cu(NO 3 ) 2 ·3H 2 O solution and KNO 3 Mix the solution and stir it with a glass rod to make it evenly mixed;

[0050] (3) Vacuum treatment: Add 100g of the iron ore obtained in step (1) into a jar with a rubber stopper, and use a vacuum pump to vacuumize the vacuum to -0.1MPa. After a period of time, ad...

Embodiment 2

[0056] The method for preparing a composite oxygen carrier for chemical chain hydrogen production from iron ore specifically includes the following steps:

[0057] (1) Crushing and screening: first, the iron ore is crushed with a crusher, and the iron ore particles with a particle size range of 0.2-0.45 mm are screened out. The main components of the iron ore are shown in Table 1;

[0058] (2) Solution preparation: 48.32g Cu(NO 3 ) 2 ·3H 2 O crystals were dissolved in an appropriate amount of deionized water to prepare Cu(NO 3 ) 2 ·3H 2 O solution. 10g KNO 3 The powder is dissolved in an appropriate amount of deionized water to prepare KNO 3 solution. The prepared Cu(NO 3 ) 2 ·3H 2 O solution and KNO 3 Mix the solution and stir it with a glass rod to make it evenly mixed;

[0059] (3) Vacuum treatment: Add 100g of the iron ore obtained in step (1) into a jar with a rubber stopper, and use a vacuum pump to vacuumize the vacuum to -0.1MPa. After a period of time, ad...

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Abstract

The invention relates to a chemical chain hydrogen production composite oxygen carrier with anti-carbon deposition properties and a preparation method thereof. First, the iron ore is crushed with a crusher, and the iron ore particles with a particle size range of 0.2-0.45mm are screened out; the iron ore is added into a jar with a rubber stopper, and vacuumized; the preparation of Cu(NO3 )2 3H2O solution and KNO3 solution and mix evenly, add the jar that is filled with iron ore through the separatory funnel, continue vacuumizing for 1-2 hours; Seal and let stand for 20 hours, carry out Cu(NO3) 2 3H2O impregnation of iron ore with solution and KNO3 solution; the mixture was dried and calcined at a temperature of 900-950°C for 4 hours to prepare a composite oxygen carrier based on iron ore. The main raw material of the method is iron ore, the price is low, the process is simple, the composite oxygen carrier prepared by the impregnation method has high reactivity, and has anti-coking ability, and the hydrogen produced has high purity.

Description

technical field [0001] The invention relates to a preparation method of an iron ore-based chemical chain hydrogen production composite oxygen carrier with anti-carbon properties, and belongs to the technical field of chemical chain hydrogen production. Background technique [0002] Since the combustion of fossil fuels has led to increasingly serious environmental degradation problems such as the greenhouse effect, and the energy crisis needs to be resolved urgently, hydrogen energy is a clean secondary energy that can replace fossil fuels in the future. According to the change of energy structure, the energy pillar basically develops in accordance with the trend of low carbon and high hydrogen, and the fuels used by human beings change from solid coal, to liquid petroleum, to gaseous natural gas, and the substitution sequence follows the direction of solid-liquid-gas According to this, hydrogen is an ideal energy carrier in the future. Hydrogen energy is a new energy with g...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J37/02C10L10/00B01J27/25C01B3/06
CPCY02E60/36
Inventor 王璐璐沈来宏牛欣蒋守席
Owner SOUTHEAST UNIV
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