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A microalgae-based nitrogen-containing carbon material for absorbing carbon dioxide and its preparation method

A technology of microalgae and nitrogen carbon, which is applied in chemical instruments and methods, separation methods, and other chemical processes, can solve the problems of high production cost and poor adsorption performance, and achieve low cost, improved adsorption capacity, and increased adsorption capacity. Effect

Active Publication Date: 2020-01-07
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the shortcomings of the prior art described above, the object of the present invention is to provide a microalgae-based nitrogen-containing carbon material for adsorbing carbon dioxide and a preparation method thereof, so as to overcome the poor adsorption performance of the carbon dioxide adsorbing material in the prior art, and produce high cost problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Take by weighing 1.0g Chlamydomonas reinhardtii (Latin name Chlamydomonas reinhardtii) through freeze-drying, 30ml deionized water, join in the 100ml hydrothermal reaction kettle, ultrasonic 10min, feed into N after the reaction kettle is sealed. 2 Replace the air in the kettle, and finally place it in an oven at 180°C for 4 hours of carbonization, cool, filter, wash, dry, and then vacuum dry at 80°C for 12 hours to obtain a biochar composite material. Mix 1g of biochar composite material with 0.01g·ml -1 The KOH solution was mixed and placed in a tubular reactor for activation at 400°C for 1 hour to obtain a KOH-activated biochar composite material. The obtained activated biochar has a nitrogen content of 1.90% and can absorb 4.24mmol / g of carbon dioxide.

Embodiment 2

[0041] Weigh 2.0g of Scenedesmus acuminatus (Latin name is Scenedesmus acuminatus) through freeze-drying process, 30ml deionized water, join in the 100ml hydrothermal reactor, ultrasonic 10min, feed into N after the reactor is sealed. 2 Replace the air in the kettle, and finally place it in an oven at 180°C for 8 hours of carbonization, cool, filter, wash, dry, and then vacuum-dry at 80°C for 12 hours to obtain a biochar composite material. Mix 1g biochar composite material with 0.1g·ml -1 The KOH solution was mixed and placed in a tubular reactor for activation at 600°C for 2 hours to obtain a KOH-activated biochar composite material. The obtained activated biochar composite material has a nitrogen content of 3.23%, and can absorb carbon dioxide of 6.68mmol / g.

Embodiment 3

[0043]Weigh 5.0g of freeze-dried chlorella (Chlorella pyrenoidosa in Latin name), 30ml of deionized water, join in a 100ml hydrothermal reaction kettle, ultrasonic 10min, pass into N after the reaction kettle is sealed. 2 Replace the air in the kettle, and finally place it in an oven at 240°C for carbonization for 16 hours, cool, filter, wash, dry, and then vacuum dry at 80°C for 12 hours to obtain a biochar composite material. Mix 1g biochar composite material with 5g·ml -1 The KOH solution was mixed and placed in a tubular reactor for activation at 500°C for 3 hours to obtain a KOH-activated biochar composite material. The obtained activated biochar composite material has a nitrogen content of 2.96%, and can absorb carbon dioxide of 5.62mmol / g.

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Abstract

The invention discloses a preparing method of a microalgae-based nitrogenous carbon material used for adsorbing carbon dioxide. The preparing method comprises the first step of dispersing the microalgae into water to form microalgae suspension liquid; the second step of conducting heating and carbonization on the microalgae suspension liquid, and afterwards, filtering, washing and drying the microalgae suspension liquid to obtain a biological carbon composite material; conducting excitation on the biological carbon composite material to form the microalgae-based nitrogenous carbon material. The microalgae-based nitrogenous carbon material obtained through the preparing method can efficiently adsorb carbon dioxide in gases.

Description

technical field [0001] The invention relates to a new material and a preparation method thereof, in particular to a microalgae-based nitrogen-containing carbon material for absorbing carbon dioxide and a preparation method thereof. Background technique [0002] Carbon dioxide is considered the main room temperature gas and is responsible for nearly 60% of the global warming effect. Carbon capture and storage technology is considered to be the most advantageous method to reduce carbon dioxide emissions. Amine scrubbing is a widely used traditional technology for capturing and sequestering carbon dioxide from fossil fuel-burning power plants. However, this process has many problems such as high energy consumption during regeneration, solvent loss, toxicity, and equipment corrosion. To address these challenges, the use of adsorbents adsorbed on porous solids is considered to be a promising alternative technology. So far, many studies have been devoted to the preparation of h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/30B01J20/20B01D53/02
CPCB01D53/02B01D2253/102B01D2257/504B01J20/20Y02C20/40
Inventor 刘唱孔令照孙予罕苗改谭志超李盛林
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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