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Method for producing hydrogen through lignite chemical looping gasification based on steel slag oxygen carrier

A technology of oxygen carrier and chemical chain, applied in the field of industrial solid waste resource utilization, to achieve the effect of good oxygen transfer performance, wide source of raw materials, and high purity

Pending Publication Date: 2021-07-23
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Oxygen carriers with a single active component can no longer meet the needs of process development. At present, the research on new oxygen carriers is gradually developing towards composite, multi-functional, and high-stable types.

Method used

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  • Method for producing hydrogen through lignite chemical looping gasification based on steel slag oxygen carrier
  • Method for producing hydrogen through lignite chemical looping gasification based on steel slag oxygen carrier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Embodiment 1: a kind of method based on the lignite chemical chain gasification hydrogen production of steel slag oxygen carrier, it carries out according to the following steps:

[0031] Step 1. Grinding hot stuffy steel slag and lignite respectively, and sieving to below 120 mesh;

[0032] Step 2, weighing 18.5g of hot stuffy steel slag and lignite 18.5g ground and screened in step 1 by mass percentage;

[0033] Step 3, dry mixing the hot stuffy steel slag and lignite taken in step 2 in a three-dimensional mixer for 20 minutes;

[0034] Step 4, filling the mixed material in step 3 in the reactor, so that the gas can fully contact with the material and pass through the material;

[0035] Step 5. Under a nitrogen atmosphere of 100mL / min, feed water vapor into the reactor, raise the temperature to 950°C at a rate of 5°C / min, and continue the reaction at 950°C for 2 hours to obtain a hydrogen content of ≥86%.

Embodiment 2

[0036] Embodiment 2: a kind of method based on the lignite chemical chain gasification hydrogen production of steel slag oxygen carrier, it carries out according to the following steps:

[0037] Step 1. Grinding hot stuffy steel slag and lignite respectively, and sieving to below 120 mesh;

[0038] Step 2, take by mass percentage 3.7g and lignite 14.8g that are ground and sieved in step 1;

[0039] Step 3, dry mixing the hot stuffy steel slag and lignite taken in step 2 in a three-dimensional mixer for 20 minutes;

[0040] Step 4, filling the mixed material in step 3 in the reactor, so that the gas can fully contact with the material and pass through the material;

[0041] Step 5. Under a nitrogen atmosphere of 100mL / min, feed water vapor into the reactor, raise the temperature to 950°C at a rate of 5°C / min, and continue the reaction at 950°C for 2 hours to obtain a hydrogen content of ≥86%.

Embodiment 3

[0042] Embodiment 3: a kind of method based on the lignite chemical chain gasification hydrogen production of steel slag oxygen carrier, it carries out according to the following steps:

[0043] Step 1. Grinding hot stuffy steel slag and lignite respectively, and sieving to below 120 mesh;

[0044] Step 2, taking by mass percentage 7.4g and lignite 11.1g ground and screened in step 1;

[0045] Step 3, dry mixing the hot stuffy steel slag and lignite taken in step 2 in a three-dimensional mixer for 20 minutes;

[0046] Step 4, filling the mixed material in step 3 in the reactor, so that the gas can fully contact with the material and pass through the material;

[0047] Step 5. Under a nitrogen atmosphere of 100mL / min, feed water vapor into the reactor, raise the temperature to 950°C at a rate of 5°C / min, and continue the reaction at 950°C for 3 hours to obtain a hydrogen content of ≥88%.

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Abstract

The invention discloses a method for producing hydrogen through lignite chemical looping gasification based on a steel slag oxygen carrier, which comprises the following steps: step 1, respectively grinding steel slag and lignite, and conducting screening to be 120 meshes or less; 2, weighing the steel slag and the lignite according to the mass percentage; 3, conducting dry mixing for 15-20 min in a three-dimensional mixing machine; 4, filling a reactor with the mixed material, so as to enable the gas to be in full contact with the material and capable of passing through the material; and 5, introducing water vapor into the reactor in a nitrogen atmosphere, and continuously conducting reacting at 900-950 DEG C to obtain hydrogen. The method has the advantages that the pyrolytic steel slag is used as the oxygen carrier, the water vapor is introduced to react with the lignite in the nitrogen atmosphere to produce the hydrogen, the process flow is simple, the operation cost is low, and the raw material source is wide; and elements such as iron, magnesium, aluminum and calcium in the pyrolytic steel slag are fully utilized, on one hand, the efficiency of chemical chain gasification hydrogen production can be promoted, on the other hand, part of steel slag can be consumed, and reduction and resource utilization of industrial solid waste are achieved.

Description

technical field [0001] The invention relates to a method for producing hydrogen by lignite chemical chain gasification based on a steel slag oxygen carrier, and belongs to the field of resource utilization of industrial solid waste. Background technique [0002] A large amount of accumulated smelting waste not only occupies land, but also causes a waste of resources. At present, the treatment method of steel slag is mainly landfill, which has the risk of heavy metal pollution. The methods of comprehensive utilization of steel slag are mainly: as roadbed, pit landfill raw material, as metallurgical raw material, as building material, etc. [0003] Chemical looping gasification technology is a high-efficiency, green and environmentally friendly new energy utilization method. It uses lattice oxygen delivered by an oxygen carrier to react. By controlling the amount of fuel added, reaction temperature, and water vapor intake, it can The fuel is converted to CO and H2. Compared...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/72
CPCC10J3/72C10J2300/093C10J2300/0996C10J2300/0983C10J2300/0976Y02P20/129
Inventor 马丽萍潘青唤杜旺杨静
Owner KUNMING UNIV OF SCI & TECH
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