Method for directly preparing carbon monoxide from coke-oxygen carrier

A carbon monoxide and oxygen carrier technology, applied in carbon monoxide, gasification process, molten salt/molten metal gasification, etc., can solve the problems of complex gas products, slow reaction rate, large demand, etc., and achieve good selectivity, low cost, Effect of reducing CO2

Active Publication Date: 2022-06-28
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

Both have some shortcomings, such as steam coal gasification has a large demand for water resources, which is not suitable for water-shortage areas, and the gas products are very complex, requiring multiple subsequent processing steps before they can be used for further production; using oxygen as a gasification agent requires The cost of separating oxygen from air is high, and the mixture of oxygen and coal powder is prone to explosion hazards; the reaction rate of using carbon dioxide as a gasification agent is slow, and catalysts are required to improve process efficiency

Method used

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  • Method for directly preparing carbon monoxide from coke-oxygen carrier

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preparation example Construction

[0031] The preparation method of carbon monoxide specifically comprises the following steps:

[0032] S1. The char particles and the oxygen carrier particles are placed together at the bottom of the fuel reactor, and then the solid material is lifted to the top of the fuel reactor under the carrying of the fluidizing gas. During the lifting process, the lattice oxygen in the oxygen carrier Directly oxidize the coal char, then the coal char is oxidized under the action of the oxygen carrier to generate carbon monoxide and a small amount of carbon dioxide gas; then the gas product (where the carbon monoxide gas concentration is greater than 70%), the reacted oxygen carrier and a small amount of carbon dioxide gas are separated in the cyclone separator. ash;

[0033] S2. The reacted oxygen carrier separated by the cyclone is sent to the bottom of the air reactor, and the oxygen carrier is lifted to the top of the reactor under the driving of the air fluidizing gas, and the oxygen...

Embodiment 1

[0056] The temperature of the fuel reactor is 800°C, the temperature of the air reactor is 850°C, the mass ratio of coal char to oxygen carrier is 1:25, and the volatile content of coal char is 5%.

Embodiment 2

[0058] The temperature of the fuel reactor is 850°C, the temperature of the air reactor is 850°C, the mass ratio of coal char to oxygen carrier is 1:25, and the volatile content of coal char is 5%.

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Abstract

The invention belongs to the technical field of clean utilization of coal, and particularly discloses a method for directly preparing carbon monoxide from coke-oxygen carrier, which comprises the following steps: S1, reacting coke particles and oxygen carrier particles in a fuel reactor under the carrying of fluidizing gas, and directly oxidizing the coke by lattice oxygen in the oxygen carrier to obtain carbon monoxide; generating a gas product containing carbon monoxide gas; the oxygen carrier is a perovskite type oxide; s2, feeding the reacted oxygen carrier into an air reactor, so that the oxygen carrier is oxidized and regenerated by oxygen in air; and S3, feeding the regenerated oxygen carrier into a fuel reactor, mixing the regenerated oxygen carrier with continuously input coke, and meanwhile, introducing part of gas products generated by oxidation of the coke into the fuel reactor as fluidizing gas so as to realize recycling. Through the arrangement of the double fluidized beds, the use efficiency of the oxygen carrier is improved, continuous production of carbon monoxide-rich gas is realized, and the device has the advantages of simple process flow, convenience in operation, safety, reliability and the like.

Description

technical field [0001] The invention belongs to the technical field of clean utilization of coal, and more particularly relates to a method for directly preparing carbon monoxide from a char-oxygen carrier. Background technique [0002] Coal is the most widely distributed, most abundant and cheapest fossil fuel resource in the world, and occupies an important position in the global primary energy consumption. However, the direct combustion of coal will generate a large amount of carbon dioxide, aggravate global warming, and at the same time produce a large amount of dust, sulfur oxides, and nitrogen oxides, polluting the atmospheric environment. Therefore, coal gasification technology, which converts coal into cleaner gas fuel, has become the most important way for efficient and clean utilization of coal. [0003] The gasification agent of traditional coal gasification technology mainly uses water steam, oxygen or carbon dioxide. There are some shortcomings. For example, s...

Claims

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Application Information

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IPC IPC(8): C10J3/57C01B32/40
CPCC10J3/57C01B32/40C10J2300/0943
Inventor 张立麒曹丁山罗聪幸文婷李小姗邬凡
Owner HUAZHONG UNIV OF SCI & TECH
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