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Spherical porous carbon and preparation method thereof

A porous carbon and spherical technology, applied in chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., to achieve the effect of high ball forming rate, strong continuous operability, and simple steps

Inactive Publication Date: 2018-09-28
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] The main purpose of the present invention is to provide a method for preparing spherical porous carbon with coal liquefaction pitch as raw material, to solve the problem of high value-added utilization of asphaltenes (THF solubles) in coal liquefaction oil residue in the prior art, thereby Maximize economic benefits of direct coal liquefaction industry

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  • Spherical porous carbon and preparation method thereof

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preparation example Construction

[0034] In order to solve this problem, the invention provides a kind of preparation method of spherical porous carbon, such as figure 1 As shown, the method includes: adding coal liquefied pitch to obtain pitch melt; spray drying the pitch melt to obtain pitch microspheres; pre-oxidizing the pitch microspheres to obtain infusible pitch microspheres; Spherical porous carbon is obtained after infusible pitch microspheres are carbonized and activated.

[0035] The present invention uses coal liquefaction pitch as raw material to prepare spherical porous carbon through heating, spheroidization, pre-oxidation, carbonization, activation and other processes. High carbon content, easy polymerization or cross-linking product characteristics. On the other hand, the present invention adopts a spray drying process in the asphalt spheroidization process, which has simple steps, strong continuous operability, high spheroidization rate, high sphericity and adjustable particle size of micros...

Embodiment 1

[0048] In a 2L stirred tank, at a stirring speed of 100r / min, add 1000g of coal liquefied pitch with a particle size of less than 3mm, an ash content of 0.001%, a softening point of 110°C, and a coking value of 50%, and heat up at a rate of 5°C / min to 160°C, and stirred at a constant temperature for 0.5h to obtain a coal liquefaction bitumen melt.

[0049] Fill the stirred tank with nitrogen, control the pressure to 0.1MPa, open the valve on the pipeline between the bottom of the tank and the centrifugal spray drying tower, control the feed rate to 10kg / h, feed temperature to 160°C, and press all the asphalt melt into a spray drying tower, and 850 g of asphalt microspheres with a sphericity of 90% and a particle size of 0.5 to 1.5 mm were collected from the bottom of the tower.

[0050] Put the asphalt microspheres in a horizontal tubular carbonization furnace, in the air of 100mL / min, raise the temperature to 250 °C at a rate of 0.1 °C / min, pre-oxidize at a constant temperatu...

Embodiment 2

[0053] In a 2L stirred tank, at a stirring speed of 50r / min, add 1200g of coal liquefied pitch with a particle size of less than 3mm, an ash content of 0.01%, a softening point of 132°C, and a coking value of 52.5%, and heat up at a rate of 10°C / min to 192°C, and stirred at constant temperature for 1 hour to obtain a coal liquefaction bitumen melt.

[0054] Fill the stirred tank with nitrogen, control the pressure to 0.5MPa, open the valve on the pipeline between the bottom of the tank and the centrifugal spray drying tower, control the feed rate to 8kg / h, feed temperature to 192°C, press all the bitumen melt Into the spray drying tower, 987 g of pitch microspheres with a sphericity of about 93.5% and a particle size of 0.1 to 1.1 mm were collected from the bottom of the tower.

[0055] Put the asphalt microspheres in a horizontal tubular carbonization furnace, in the air of 150mL / min, raise the temperature to 270°C at a rate of 0.5°C / min, pre-oxidize at a constant temperature...

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Abstract

The invention provides a spherical porous carbon and a preparation method thereof. The preparation method comprises the following steps of: carrying out heating treatment on the coal liquefied asphaltto obtain an asphalt melt; carrying out spraying and drying treatment on the asphalt melt to obtain an asphalt microsphere, carrying out pre-oxidation on the asphalt microsphere to obtain a non-melted asphalt microsphere; carbonizing and activating the non-melted asphalt microsphere to obtain spherical porous carbon. The method prepares spherical porous carbon by using coal liquefied asphalt as araw material, high-value utilization of the asphaltene in the coal liquefaction oil slag can be carried out, and the characteristics of high aromatic degree, high carbon content, easy polymerizationor cross-linking are fully utilized. Furthermore, the preparation method of the spherical porous carbon has the advantages of simple steps, strong continuous operability, high sphere-forming rate, high sphericity and adjustable micro-sphere particle diameters.

Description

technical field [0001] The invention relates to the field of preparation of spherical porous carbon, and more specifically, to a spherical porous carbon and a preparation method thereof. Background technique [0002] Coal liquefaction residue is a non-target product of the direct coal liquefaction process, accounting for about 30% of the coal input. It is a substance with high ash, high sulfur and high calorific value, mainly composed of non-distillate liquefied oil (n-hexane solubles) , asphaltenes (n-hexane insoluble tetrahydrofuran solubles), unconverted coal and inorganic matter. Non-distillate liquefied oil and asphaltenes account for about 50% of the residue, mainly composed of polycyclic condensed aromatic hydrocarbons, which have the characteristics of high aromaticity, high carbon content, easy polymerization or crosslinking, and have characteristics similar to petroleum pitch and coal tar pitch It is very suitable as a raw material for the preparation of carbon ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/348C01B32/336C01B32/33
CPCC01B32/33C01B32/336C01B32/348
Inventor 程时富常鸿雁向柠王国栋章序文李克健舒歌平
Owner CHNA ENERGY INVESTMENT CORP LTD
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