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Preparation method of mesoporous tomato stem active carbon

A tomato, multi-mesoporous technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of incompetent industrial utilization, large amount of activator, low activation efficiency, etc., to achieve developed pores, more mesopores, and activated Efficient effect

Inactive Publication Date: 2013-06-12
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Phosphoric acid is a commonly used activator. The mesoporous content of activated carbon prepared by phosphoric acid method is higher than that of zinc chloride method and alkaline method, but there are problems such as low activation efficiency, large amount of activator, troublesome subsequent treatment, and difficult washing.
[0003] Tomato is a global crop. A large number of tomato stems are produced every year. At present, there is no way to industrialize utilization. It is necessary to find a reasonable cost reuse method for tomato stems to realize resource utilization, high value and commercialization. change

Method used

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  • Preparation method of mesoporous tomato stem active carbon
  • Preparation method of mesoporous tomato stem active carbon

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Wash the tomato stalks with water, dry them at 100°C, pulverize them with a plant pulverizer, pass through a 45-mesh sieve, and set aside;

[0024] (2) According to the mass ratio of tomato sticks: H 4 P 2 o 7 = 1:1, H 4 P 2 o 7 Add to the tomato stalk scraps processed in step (1), stir while adding, after ultrasonic treatment for 15min, let stand at room temperature for 8h to obtain a mixture;

[0025] (3) Put the mixture treated in step (2) in a muffle furnace, heat up to 500°C, carbonize for 1 hour, stop heating, cool to room temperature, take out the solid material, wash with deionized water to a pH value of 6.5, and bake Dry, multi-mesoporous tomato stalk activated carbon.

[0026] Gained tomato stalk activated carbon electron microscope photo is as follows figure 1 As shown, the pore size distribution and N 2 The adsorption-desorption curve is as figure 2 It can be seen from the results that the prepared activated carbon is completely activated, has ...

Embodiment 2

[0028] (1) Wash the tomato stalks with water, dry them at 80° C., pulverize them with a plant pulverizer, pass through a 45-mesh sieve, and set aside;

[0029] (2) According to the mass ratio of tomato sticks: H 4 P 2 o 7 =1:0.75, H 4 P 2 o 7 Adding it to the crushed tomato stalks processed in step (1), mixing evenly, heating the mixture in a water bath at 90°C for 18 minutes, and standing it at room temperature for 8 hours to obtain the mixture;

[0030] (3) Put the mixture treated in step (2) in a muffle furnace, heat up to 450°C, carbonize for 1.5h, stop heating, cool to room temperature, take out the solid material, wash with deionized water until the pH value is 7.0, Dry naturally, that is, multi-mesoporous tomato stem activated carbon.

Embodiment 3

[0032] (1) Wash the tomato stalks with water, dry them at 90° C., pulverize them with a plant pulverizer, pass through a 45-mesh sieve, and set aside;

[0033] (2) According to the mass ratio of tomato sticks: H 4 P 2 o 7 =1:0.9, H 4 P 2 o 7 Adding to the crushed tomato stalks processed in step (1), stirring while adding, after ultrasonic treatment for 18min, standing for 7.5h to obtain a mixture;

[0034] (3) Put the mixture treated in step (2) in a muffle furnace, heat up to 500°C, carbonize for 1 hour, stop heating, cool to room temperature, take out the solid material, wash with deionized water to a pH value of 6.5, and bake Dry or air-dried, that is, multi-mesoporous tomato stalk activated carbon.

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Abstract

The invention relates to a preparation method of mesoporous tomato stem active carbon, comprising the following steps: drying and crushing tomato stems, and sieving with a 45 mesh sieve for subsequent use; adding H4P2O7 in the processed tomato stems according to a weight ratio of the tomato stems to H4P2O7 being 1 to 0.75-1, carrying out ultrasonic processing for 15-20 min or heating for 15-20 min in a water bath kettle, standing for 7.5-8 h to obtain a mixture; heating the mixture in a muffle furnace to 450-500 DEG C, carbonizing for 1-1.5 h, cooling to room temperature, then taking out the solid material, washing, drying or naturally drying in the air. The prepared mesoporous tomato stem active carbon has the advantages of large specific surface area, developed aperture, multiple meso pores, strong adsorption, and good performance, and can effectively remove macromolecular harmful pollutant.

Description

technical field [0001] The invention relates to a method for preparing activated carbon, in particular to a method for preparing multi-mesoporous activated carbon by using tomato stems, and belongs to the technical field of resource reuse for preparing adsorption materials. Background technique [0002] Activated carbon is an excellent adsorbent material with large specific surface area, developed pores, fast adsorption and desorption, strong regeneration ability, large adsorption capacity and good adsorption kinetics performance, and is widely used in environmental protection and chemical industry. , military chemical protection and chemical power supply and other fields. For a long time, coal, petroleum coke, and wood are the main raw materials for preparing activated carbon. In recent years, in order to reduce the price of activated carbon, researchers have mostly used agricultural solid waste such as cotton stalks, corn stalks, and peanut shells to prepare activated carb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/30C01B31/08
Inventor 岳钦艳孙媛媛高悦高宝玉邱宪峰黄理辉何红桃
Owner SHANDONG UNIV
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