Preparation method of eggplant stalk activated carbon

A technology of eggplant straw and activated carbon is applied in the field of preparation of eggplant straw activated carbon, which can solve the problems of environmental pollution, resource waste and the like, and achieve the effects of low corrosiveness, small environmental pollution and wide sources.

Inactive Publication Date: 2013-04-03
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

On the one hand, this is a waste of resources, on the other hand, it also pollutes the environment.

Method used

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  • Preparation method of eggplant stalk activated carbon

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Effect test

Embodiment 1

[0025] A certain amount of discarded crop eggplant stalks were selected, washed, dried, and crushed to 1 cm. Carbonize for 30 minutes, carbonization temperature is 650°C, KOH:straw mass ratio is 2:1, activation time is 100min, activation temperature is 650°C, heat in a heating furnace, then cool to room temperature and take out. Then soak it in 0.1mol / L hydrochloric acid, stir continuously at about 60°C for 1 hour, wash it with hot distilled water until neutral, dry, and sieve to 200 mesh to obtain powdered eggplant straw activated carbon. The activated carbon prepared under this condition has an iodine adsorption value of 2038.5mg / g, and a methylene blue adsorption value of 41.3mL / 0.1g, which far exceeds the national first-class activated carbon standard for wood water purification (GBT138032-1999, activated carbon for wood water purification-- Grade product quality indicators: iodine adsorption value ≥ 1000mg / g, methylene blue value ≥ 9ml / 0.1g).

Embodiment 2

[0027] A certain amount of discarded crop eggplant stalks were selected, washed, dried, and crushed to 1 cm. After carbonization for 30 minutes, activate at an activation temperature of 700°C, an activation time of 80 minutes, and a carbonization temperature of 450°C, using activators (KOH and NaOH), with a mass ratio of KOH:NaOH:eggplant straw of 3:1:1. Heat in the oven, then cool to room temperature and remove. Then soak it in 0.1mol / L hydrochloric acid, stir continuously at 60°C for 1 hour, rinse with hot distilled water until neutral, dry, and sieve to 200 mesh to obtain powdered eggplant straw activated carbon. Activated carbon with an iodine adsorption value of 2356.40mg / g and a methylene blue adsorption value of 42mL / 0.1g can be obtained, which far exceeds the national standard for first-class activated carbon for wood water purification (GBT138032-1999, quality index for first-class activated carbon for wood water purification: iodine adsorption value ≥1000mg / g, methy...

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Abstract

The invention relates to a preparation method of eggplant stalk activated carbon, comprising the following steps of: cleaning, drying and crushing eggplant stalks, carbonizing for 30-40 minutes at the temperature of 450-650 DEG C, activating for 80-100 minutes at the temperature of 650-700 DEG C with an activating agent, cooling to room temperature, and then taking out the eggplant stalks; then soaking the activated eggplant stalks into hydrochloric acid, stirring for 1-2 hours at the temperature of 55-65 DEG C, washing to be neutral with distilled water, drying, and screening to the size of 200 meshes, so that powdery eggplant stalk activated carbon is obtained, wherein the weight ratio of the activating agent to the eggplant stalks is (2-4): 1. The prepared method provided by the invention is simple and effective, raw materials are widely available, cost is low, corrosivity is low, pollution to the environment is less, iodine adsorption value and methylene blue adsorption value of the eggplant stalk activated carbon are far higher than the standard values of the national wood water purification primary activated carbon, and a new raw material is developed for manufacturing of the activated carbon.

Description

technical field [0001] The invention belongs to the field of activated carbon preparation, and in particular relates to a preparation method of eggplant straw activated carbon. Background technique [0002] As an important adsorption material, activated carbon with high specific surface area has broad application prospects. The raw materials come from a wide range of sources. Wood, petroleum, coal, fruit shells, etc. can be used to prepare activated carbon. With the depletion of disposable resources, people need to develop new available materials. Alternative, renewable resources. my country is a big agricultural country, and the total output of crop straw exceeds 700 million tons every year, but its utilization rate is only about 5%. In recent years, with the development of the rural economy and the improvement of energy supply, the burning and utilization of straw by farmers has gradually decreased, and the proportion of straw in rural energy has shown a downward trend. I...

Claims

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Application Information

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IPC IPC(8): C01B31/12B09B3/00C01B32/348
CPCY02W30/78
Inventor 马承愚刘建奇杨超赵辰航蒋淑红范梦阳张恺侯伟毅陈香
Owner DONGHUA UNIV
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