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Method for preparing porous carbon by utilizing rose stems

A porous carbon and rose technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problem that rose stems are not developed and utilized

Inactive Publication Date: 2016-07-06
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Rose is a popular flower, which is widely planted at present. In order to regulate the growth of roses, flower farmers need to prune roses at least twice a year, that is, winter and spring pruning and pruning after flowering, so there are discarded rose stems that are not developed every year. use

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  • Method for preparing porous carbon by utilizing rose stems
  • Method for preparing porous carbon by utilizing rose stems

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Embodiment 1

[0030] (1) After cutting the rose stems into 12cm-15cm lengths, wash the rose stems and dry them in an oven at 110°C for 5 hours, then raise the temperature to 360°C at a rate of 3°C / min in a tube furnace under nitrogen protection, and Keep it for 2 hours for pre-carbonization;

[0031] (2) Mix the pre-carbonized rose stem and potassium hydroxide evenly in a mass ratio of 1:1, and heat up to 600°C at a rate of 3°C / min in a tube furnace under nitrogen protection, and keep it for 2h , for carbonization activation;

[0032] (3) The carbonized and activated product was naturally cooled to room temperature under the protection of nitrogen, washed with 1mol / L hydrochloric acid to remove the inorganic components in the product, then washed with deionized water at 100°C until neutral, and dried at 120°C for 12h to obtain a porous carbon materials;

[0033] (4) The porous carbon material is measured by the BET specific surface area test method, and its BET specific surface area reach...

Embodiment 2

[0035] (1) After cutting the rose stems into 12cm-15cm lengths, wash the rose stems and dry them in an oven at 110°C for 5 hours, then raise the temperature to 360°C at a rate of 3°C / min in a tube furnace under nitrogen protection, and Keep it for 2 hours for pre-carbonization;

[0036] (2) Mix the pre-carbonized rose stem and potassium hydroxide evenly in a mass ratio of 1:1, and heat up to 750°C at a rate of 3°C / min in a tube furnace under nitrogen protection, and keep it for 2h , for carbonization activation.

[0037] (3) The carbonized and activated product was naturally cooled to room temperature under the protection of nitrogen, washed with 1mol / L hydrochloric acid to remove the inorganic components in the product, then washed with deionized water at 100°C until neutral, and dried at 120°C for 12h to obtain a porous carbon materials;

[0038] (4) The porous carbon material is measured by the BET specific surface area test method, and its BET specific surface area is 22...

Embodiment 3

[0040] (1) After cutting the rose stems into lengths of 12cm-15cm, wash the rose stems and dry them in an oven at 110°C for 5 hours, then raise the temperature to 360°C at a rate of 3°C / min in a tube furnace under nitrogen protection, and Keep it for 2 hours for pre-carbonization;

[0041] (2) Mix the pre-carbonized rose stem and potassium hydroxide evenly in a mass ratio of 1:2, and heat up to 650°C at a rate of 3°C / min in a tube furnace under nitrogen protection, and keep it for 2h , for carbonization activation;

[0042] (3) The carbonized and activated product was naturally cooled to room temperature under the protection of nitrogen, washed with 1mol / L hydrochloric acid to remove the inorganic components in the product, then washed with deionized water at 100°C until neutral, and dried at 120°C for 12h to obtain a porous carbon materials;

[0043] (4) The porous carbon material is measured by the BET specific surface area test method, and its BET specific surface area re...

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Abstract

The invention relates to a method for preparing porous carbon by utilizing rose stems. According to the porous carbon, rose stems are taken as raw materials, and the method comprises the following specific steps: segmenting, cleaning, drying, pre-carbonizing, uniformly mixing with potassium hydroxide according to a mass ratio of 1:(1-3), carbonizing and activating at the temperature of 600-750 DEG C, cooling to room temperature, performing hydrochloric acid washing and deionized water washing; and finally, drying again, thereby obtaining the porous carbon. The porous carbon prepared by the method has high adsorption capacity on chromium ions and PM2.5, the maximum chromium adsorption amount can be 344.83mg / g, and the PM2.5 concentration after blocking can be reduced to 0.0588mg / m<3>.

Description

technical field [0001] The invention relates to a preparation method of porous carbon. Background technique [0002] In recent years, with the rapid development of heavy industry mainly oriented to resources and energy, the ensuing environmental problems have become more and more serious. New materials and technologies for environmental purification have become a research hotspot in the international scientific community. For example, chromium-containing wastewater mainly comes from industries such as electroplating and leather. There are two main forms of chromium in the ecological environment: Cr(III) and Cr(VI). In general, Cr(VI) is more toxic than Cr(III), and Cr(VI) affects physiological functions in the human body, accumulates in the food chain, and causes serious health problems ranging from skin irritation to lung cancer. One of the methods for purifying chromium-containing wastewater is porous carbon adsorption, so people have developed a large number of porous ...

Claims

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Application Information

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IPC IPC(8): C01B31/12B01J20/20
CPCB01J20/20C01P2004/03C01P2006/12
Inventor 黄雅钦陈敬梓
Owner BEIJING UNIV OF CHEM TECH
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