Hierarchical pore coke as well as preparation method and application thereof

A multi-stage hole and coke technology, which is applied in the coke field, can solve the problems of heavy components of tar, blockage of pipelines, oil dust blockage, etc., and achieve the effect of improving tar quality, eliminating tar, and increasing contact probability

Active Publication Date: 2021-11-30
TAIYUAN UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a kind of multi-level pores with or without metal active sites for the problem that there are many heavy components of tar in the pyrolysis of raw coal gas containing dust and oil, which are easy to coke, condense dust, and block pipelines. Coke, which is used as a particle bed filter medium, simultaneously realizes the in-situ lightening of tar during the particle bed dedusting process, improves the fluidity of raw coal gas, and solves the problem of oil dust clogging in low-order pulverized coal pyrolysis process

Method used

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  • Hierarchical pore coke as well as preparation method and application thereof
  • Hierarchical pore coke as well as preparation method and application thereof
  • Hierarchical pore coke as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] After crushing the corncob biomass produced in Jining, Shandong Province, under the condition of isolation of air, the heating rate was raised to 650°C at a constant temperature of 1h at a rate of 10°C / min. The product of mm, get corncob semi-coke.

[0052] A kind of fat coal with a caking index of 93 in the Gujiao area of ​​Shanxi was selected. After crushing and screening, coal powder with a particle size of less than 3.00mm was selected as caking coal blending.

[0053] Mix caking coal blending and corn cob semi-coke in a kneader for 30 minutes at a mass ratio of 1:9, and then carbonize at a constant temperature of 950°C at a rate of 3°C / min for 1 hour under the condition of cutting off the air to prepare Hierarchical porous coke, recorded as 10%-BC.

Embodiment 2

[0055] After crushing the corncob biomass produced in Jining, Shandong, under the condition of isolation of air, the heating rate was raised to 600°C at a constant temperature of 1.5h at a rate of 10°C / min. 0.60mm of the product, to obtain corncob semi-coke.

[0056] A kind of fat coal with a caking index of 95 in the Gujiao area of ​​Shanxi was selected. After crushing and screening, coal powder with a particle size of less than 3.00 mm was selected as caking coal blending.

[0057] Mix caking coal blending and corn cob semi-coke in a kneader for 40 minutes at a mass ratio of 2:8, and then carbonize at a constant temperature of 1000°C at a rate of 3°C / min for 1 hour under the condition of cutting off the air to prepare Hierarchical coke, denoted as 20% -BC.

Embodiment 3

[0059] After crushing the corncob biomass produced in Jining, Shandong Province, under the condition of isolation of air, the heating rate was raised to 650°C at a constant temperature of 1h at a rate of 15°C / min. The product of mm, get corncob semi-coke.

[0060] A kind of fat coal with a caking index of 105 in the Gujiao area of ​​Shanxi was selected. After crushing and screening, coal powder with a particle size of less than 3.00mm was selected as caking coal blending.

[0061] Mix caking coal blending and corn cob semi-coke in a kneader for 35 minutes at a mass ratio of 3:7, and then carbonize at a constant temperature of 900°C at a rate of 2.5°C / min for 1.5 hours under the condition of cutting off the air to prepare Get hierarchical porous coke, recorded as 30%-BC.

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Abstract

The invention relates to hierarchical pore coke, which is prepared by the following steps: pyrolyzing low-grade substances to prepare low-grade substance semi-coke with part of volatile matters, using the low-grade substance semi-coke loading or not loading metal as a raw material, adding caking coal with high caking index in a coal blending coking mode, and performing carbonizing at high temperature to prepare the hierarchical pore coke. The hierarchical pore coke has a developed pore structure, rich active sites and relatively high abrasive resistance, can be used as a filtering medium to be applied to particle bed filtration and dust removal of high-temperature dust-containing and oil-containing coal pyrolysis raw gas, synchronously catalyzes and pyrolyzes the coal pyrolysis raw gas in the dust removal process, and regulates and controls the distribution of pyrolysis products. The pyrolysis tar is lightened; and the purposes of improving the tar quality and removing dust and purifying the raw gas are achieved, so that the flowability of the raw gas is improved, and the problem of oil dust blockage in a low-order pulverized coal pyrolysis process is solved.

Description

technical field [0001] The invention relates to a coke, in particular to a coke with a hierarchical porous structure. The multi-stage porous coke of the present invention can be applied to the in-situ dedusting and lightening treatment of raw coal gas pyrolysis of high-temperature dusty and oily coal during the conversion process of low-rank coal. Background technique [0002] Using pyrolysis technology to extract tar and high value-added chemicals from coal is one of the main development directions for high-efficiency, high-value and clean utilization of coal. [0003] In the pulverized coal pyrolysis process, the raw coal gas is easy to entrain dust particles during the transportation process of the process pipeline; at the same time, the heavy component asphalt in the raw coal gas has a large proportion, and under the action of the particulate medium, it is very easy to generate autocatalysis. Carbon deposits. [0004] Due to the above reasons, it is easy to cause the b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/00C10B53/02C10B57/04C10B57/16B01D39/06B01J21/18B01J23/745B01J23/755C10K1/02C10K1/34
CPCC10B53/00C10B53/02C10B57/04C10B57/16B01D39/06B01J21/18B01J23/745B01J23/755C10K1/024C10K1/34Y02E50/10
Inventor 王倩叶泽甫张帅徐旭东朱竹军王美君申岩峰常丽萍鲍卫仁
Owner TAIYUAN UNIV OF TECH
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