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Method for preparing biological activated carbon from tomato and eggplant straw mixture

A technology of biological activated carbon and tomato straw, applied in chemical instruments and methods, carbon compounds, inorganic chemistry, etc., can solve problems such as inconvenience

Inactive Publication Date: 2020-01-14
WEIFANG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In summary, there are obviously inconveniences and defects in the actual use of the existing technology, so it is necessary to improve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Step 1 Preprocessing

[0052]The eggplant stalks and tomato stalks are washed, dried and pulverized at 85° C., passed through a 45-mesh sieve, and then mixed to obtain straw mixed granules.

[0053] Step 2 soaking activation

[0054] Mix the straw mixed particles with pyrophosphoric acid with a volume concentration of 52% in a weight ratio of 1:1, and soak. During the soaking process, stir while adding the pyrophosphoric acid. After mixing evenly, ultrasonically treat for 16 minutes, and then let stand 8.5h, get material one.

[0055] Step 3 Carbonization

[0056] The material 1 was put into a tube furnace, and then nitrogen gas was introduced to heat up the inside of the tube furnace to 450° C. for carbonization. After 0.6 h of carbonization, heating was stopped, and material 2 was obtained after cooling to room temperature.

[0057] Step 4 Recovery of pyrophosphoric acid

[0058] First use the pyrophosphoric acid solution with a volume concentration of 35% to extr...

Embodiment 2

[0065] Step 1 Preprocessing

[0066] The eggplant stalks and tomato stalks are washed, dried and pulverized at 90° C., passed through a 45-mesh sieve, and then mixed to obtain straw mixed granules.

[0067] Step 2 soaking activation

[0068] Mix the straw mixed particles with pyrophosphoric acid with a volume concentration of 58% in a weight ratio of 1:1.1, and soak them. During the soaking process, stir while adding the pyrophosphoric acid. After mixing evenly, ultrasonically treat for 18 minutes, and then let stand 9h, obtain material one.

[0069] Step 3 Carbonization

[0070] The material 1 was put into a tube furnace, and then nitrogen gas was introduced to heat up the inside of the tube furnace to 482°C for carbonization. After 0.8 hours of carbonization, heating was stopped, and material 2 was obtained after cooling to room temperature.

[0071] Step 4 Recovery of pyrophosphoric acid

[0072] First use the pyrophosphoric acid solution with a volume concentration of ...

Embodiment 3

[0079] Step 1 Preprocessing

[0080] The eggplant stalks and tomato stalks are washed, dried and pulverized at 98° C., passed through a 45-mesh sieve, and then mixed to obtain straw mixed granules.

[0081] Step 2 soaking activation

[0082] Mix the straw mixed particles with pyrophosphoric acid with a volume concentration of 63% in a weight ratio of 1:1.2, and soak them. During the soaking process, stir while adding the pyrophosphoric acid. After mixing evenly, ultrasonically treat for 20 minutes, and then let stand 10h, obtain material one.

[0083] Step 3 Carbonization

[0084] The material 1 was put into a tube furnace, and then nitrogen gas was introduced to raise the temperature inside the tube furnace to 500° C. for carbonization. After 1 hour of carbonization, heating was stopped, and material 2 was obtained after cooling to room temperature.

[0085] Step 4 Recovery of pyrophosphoric acid

[0086] First use the pyrophosphoric acid solution with a volume concentrat...

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PUM

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Abstract

The invention belongs to the technical field of biological activated carbon preparation, and provides a method for preparing a biological activated carbon from a tomato and eggplant straw mixture. Themethod comprises the following steps: cleaning, pulverizing and mixing eggplant straw and tomato straw, soaking and activating with pyrophosphoric acid, carbonizing in a tubular furnace, recovering pyrophosphoric acid, rinsing, dehydrating, drying and pulverizing to obtain the biological activated carbon. The preparation process is simple, the production cost is low, the efficiency is high, and the prepared biological activated carbon is high in adsorption capacity and suitable for removing macromolecular harmful pollutants.

Description

technical field [0001] The invention relates to the technical field of biological activated carbon preparation, in particular to a method for preparing biological activated carbon by using a mixture of tomato and eggplant straws. 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 carbon. Tomatoes and eggplants are global crops,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/342C01B32/324
CPCC01B32/324C01B32/342
Inventor 孙晓丽王淼
Owner WEIFANG UNIV OF SCI & TECH
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