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Method for preparing carbon molecular sieve from biological semi-coke

A carbon molecular sieve and semi-coke technology, which is applied in the field of carbon molecular sieve preparation by using biological semi-coke, can solve the problems of poor kinetic separation effect, environmental pollution, complex process, etc., and achieve low price, high micropore volume and simple preparation process Effect

Inactive Publication Date: 2020-12-29
SHANDONG AONENG ELECTRIC POWER SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation of carbon molecular sieves from coal has problems such as complicated process, high cost, and poor kinetic separation effect. The preparation of carbon molecular sieves from organic polymer polymers not only has the problem of high cost, but also has environmental pollution problems.

Method used

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  • Method for preparing carbon molecular sieve from biological semi-coke

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] In parts by weight, 50 parts of bio-coke, 10 parts of adhesive, 10 parts of pore-forming agent, 5 parts of water and 25 parts of biomass pyrolysis solution are weighed.

[0037] Then process and produce according to the following specific methods:

[0038] (1) Forming: Knead biological semi-coke, adhesive, pore-forming agent and water in a kneader according to the proportion, and extrude them in the extruder to shape them. After natural air drying, cut the strips and granulate to a diameter of 3mm. particles;

[0039] (2) Carbonization: Put the formed particles into a carbonization furnace, raise the temperature to 750°C at a heating rate of 5°C / min under the protection of an inert gas, and keep the temperature for 60 minutes to volatilize and carbonize organic matter; a slower heating rate can Completely volatilize organic matter;

[0040] (3) Activation: Introduce water vapor into the carbonization furnace for activation. The mass ratio of water vapor and bio-semi-c...

Embodiment 2

[0047] In parts by weight, 55 parts of bio-coke, 12 parts of adhesive, 12 parts of pore-forming agent, 6 parts of water, and 15 parts of biomass pyrolysis solution were weighed.

[0048] Then process and produce according to the following specific methods:

[0049](1) Molding: Knead the biological semi-coke, adhesive, pore-forming agent and water in the kneader according to the proportion, and extrude the strips in the extruder to shape them. After natural air drying, the strips are cut and sized to a diameter of 2mm. particles.

[0050] (2) Carbonization: put the shaped particles into a carbonization furnace, and raise the temperature to 720°C at a rate of 5°C / min under the protection of an inert gas, and keep the temperature constant for 40 minutes to volatilize and carbonize organic matter.

[0051] (3) Activation: Introduce water vapor into the carbonization furnace for activation. The mass ratio of water vapor to bio-semi-coke is 3:1, and the activation time is 50 minute...

Embodiment 3

[0058] In terms of parts by weight, 40 parts of bio-coke, 15 parts of adhesive, 15 parts of pore-forming agent, 10 parts of water and 20 parts of biomass pyrolysis solution are weighed.

[0059] Then process and produce according to the following specific methods:

[0060] (1) Forming: Knead biological semi-coke, adhesive, pore-forming agent and water in a kneader according to the proportion, and extrude them in the extruder to shape them. After natural air drying, cut the strips and granulate to a diameter of 3mm. particles.

[0061] (2) Carbonization: Put the formed particles into a carbonization furnace, and under the protection of an inert gas, heat up to 700°C at a rate of 6°C / min, and keep the temperature constant for 60 minutes to volatilize and carbonize organic matter.

[0062] (3) Activation: Introduce water vapor into the carbonization furnace for activation. The mass ratio of water vapor to bio-semi-coke is 3:1, and the activation time is 60 minutes, so that the c...

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Abstract

The invention discloses a method for preparing a carbon molecular sieve from biological semi-coke, which comprises the following steps: proportionally kneading biological semi-coke, an adhesive, a pore-forming agent and water in a kneading machine uniformly, carrying out extrusion molding in a strip extruder, naturally air-drying, breaking into strips, granulating to obtain granules with a diameter of 2-4 mm, putting the molded granules into a carbonization furnace, and keeping the temperature at 500-750 DEG C for 30-100 minutes so as to evaporate and carbonize the organic matters; then introducing water vapor into the carbonization furnace for activation so as to clean closed or blocked micro-pores, then carrying out isopyknic normal-temperature impregnation on the activated particles andbiomass pyrolysis liquid for 6-12 hours, putting the impregnated particles into a muffle furnace at the temperature of 750-850 DEG C, keeping the temperature constant for 30-60 minutes, optimizing the micro-pores of the particles, and finally cooling so as to obtain the carbon molecular sieve. The raw material biological semicoke is wide in source and low in price, the biomass pyrolysis liquid isadopted for carbon deposition, the preparation process is simple, and the prepared carbon molecular sieve is large in specific surface area, uniform in pore diameter, narrow in range, high in micropore volume and high in permeability and selectivity.

Description

technical field [0001] The invention relates to the technical field of carbon molecular sieve preparation, in particular to a method for preparing carbon molecular sieves by using biological semi-coke. Background technique [0002] Carbon molecular sieve is a new type of adsorbent, which belongs to porous carbon, and is mainly used for the separation of various mixed gases. The main components of carbon molecular sieves are crystalline carbon and amorphous carbon, which have a highly developed pore structure and special surface properties. Carbon molecular sieves are widely used in the field of nitrogen and oxygen production in the chemical industry because of their special microporous structure and extremely high reactivity, adsorption, enrichment and reaction performance in nanospace, as well as high melting point and anti-acid and alkali corrosion properties. Sewage treatment field, etc. At present, with the escalation of global safety and environmental protection press...

Claims

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Application Information

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IPC IPC(8): C01B32/306C01B32/336C01B32/354C01B32/318
CPCC01B32/306C01B32/318C01B32/336C01B32/354
Inventor 周忠新李丰盛
Owner SHANDONG AONENG ELECTRIC POWER SCI & TECH
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