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Method for preparing internal separation synthesis gas by chemical chain gasification of solid fuel

A solid fuel and chemical chain technology, applied in chemical instruments and methods, using solid contact hydrogen separation, hydrogen separation, etc., can solve the problems of reduced active components, increased reaction load, increased oxygen carrier amount, etc., to achieve good The effect of cycle performance

Pending Publication Date: 2022-02-08
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are also many scholars who combine oxygen carriers with other inert carriers such as Al 2 o 3 , ZrO 2 、TiO 2 , CeO 2 、MaAl 2 o 4 found that the inert carrier can improve the activity and stability of the oxygen carrier to a certain extent, but the addition of the carrier leads to a decrease in the amount of the active component, which increases the amount of the required oxygen carrier, which in turn increases the flux between the reactors. Increased response load

Method used

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  • Method for preparing internal separation synthesis gas by chemical chain gasification of solid fuel
  • Method for preparing internal separation synthesis gas by chemical chain gasification of solid fuel
  • Method for preparing internal separation synthesis gas by chemical chain gasification of solid fuel

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Effect test

Embodiment 1

[0045] BaFe 2 o 4 / NiFe 2 o 4 / CoFe 2 o 4 / CaFe 2 o 4 The preparation method of oxygen carrier comprises the following steps:

[0046] Step 1: Barium nitrate / nickel nitrate / cobalt nitrate / calcium nitrate, ferric nitrate and citric acid (Ba 2+ / Ni 2+ / Co 2+ / Ca 2+ -Fe 3+ - the molar ratio of citric acid is 1:2:2) mixed in deionized water at 50°C, and stirred for 6h;

[0047] Step 2: adjust the pH of the solution obtained in step 1 to 7 with ammonia water;

[0048] Step 3: Stir the solution obtained in Step 2 at 80°C until it reaches a gel state;

[0049] Step 4: Dry the gel obtained in Step 3 in an oven at 120°C for 12 hours;

[0050] Step 5: Put the solid obtained in Step 4 in a muffle furnace, and heat it up to 450° C. for 2 hours at a heating rate of 10° C. / min in an air atmosphere;

[0051] Step 6: Grind and mix the solid obtained in Step 5 in a ball mill (clockwise for 1 hour, counterclockwise for 1 hour, pause for 10 minutes).

[0052] Step 7: Put the soli...

Embodiment 2

[0055] A method for preparing internally separated synthesis gas by chemical looping gasification of solid fuel, comprising the following steps:

[0056] Step 1: with the BaFe that embodiment 1 makes 2 o 4 The oxygen carrier is mixed with the biomass coke (the molar ratio of the C element in the biomass coke to the O element in the oxygen carrier is 1:2), and placed in a partial oxidation reactor for redox reaction, the reaction temperature is 900°C, and the reaction The time is 1h, and the CO-enriched gas is collected;

[0057] Step 2: Send the reduced oxygen carrier into the steam reactor for steam cracking reaction, the reaction temperature is 900°C, the reaction time is 40min, and high-purity H 2 ;

[0058] Step 3: Send the oxygen carrier regenerated in step 2 into the air oxidizer to fully oxidize the oxygen carrier. The reaction temperature is 900°C and the reaction time is 30 minutes.

[0059] Collect tail gas and solid products, measure carbon conversion rate, CO y...

Embodiment 3

[0061] Compared with embodiment 2, adopt NiFe in the present embodiment 2 o 4 Oxygen carrier, all the other steps are the same as in Example 2.

[0062] Collect tail gas and solid products, measure carbon conversion rate, CO yield, CO selectivity, H 2 Yield and H 2 Purity, measurement results see Table 1, observe NiFe 2 o 4 The phase transition of the oxygen carrier, see the phase transition results image 3 .

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Abstract

The invention belongs to the technical field of energy conversion and environmental protection, and provides a method for preparing internal separation synthesis gas by chemical chain gasification of solid fuel, which comprises the following steps: mixing the solid fuel and an oxygen carrier, carrying out redox reaction in a partial oxidation reactor, and collecting CO-rich gas; and feeding the reduced oxygen carrier into a water vapor reactor, carrying out water vapor cracking reaction, regenerating the oxygen carrier, and co-producing to obtain hydrogen. The regenerated oxygen carrier can be directly fed into the partial oxidation reactor or is firstly fully oxidized and regenerated in the air oxidizer, and then is fed into the partial oxidation reactor for the next cycle, so that the continuous preparation of the internal separation synthesis gas is completed. According to the method, the characteristics of the chemical looping technology are fully utilized, in-situ separation of traditional gasification products CO and H2 is achieved, the quality of the gasification products is greatly improved, the application range of the gasification products is greatly widened, and good application prospects are achieved.

Description

technical field [0001] The invention belongs to the technical field of energy conversion and environmental protection, and in particular relates to a method for preparing internally separated syngas by chemical loop gasification of solid fuel. Background technique [0002] With the improvement of human living standards and industrialization, human society's energy consumption and demand continue to increase. Due to the extensive use of fossil energy, a large number of environmental problems have emerged, such as extreme weather and the greenhouse effect. Therefore, more and more researchers shift their research focus to the utilization of clean and sustainable energy. As a clean and efficient secondary energy source, hydrogen energy has high combustion efficiency and clean and pollution-free products. Hydrogen energy is also widely used and plays an irreplaceable role in the fields of energy, electricity, and chemical synthesis. Gasification technology is a traditional ener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B3/56C01G49/00C01G51/00C01G53/00
CPCC01B3/56C01G49/0036C01G51/00C01G53/00
Inventor 王志青孙浩晨苗恒洋刘哲语董立波郝振华黄戒介程中虎房倚天
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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