Method for preparing carbon molecular sieve from apple dregs

A carbon molecular sieve and apple pomace technology, applied in chemical instruments and methods, other chemical processes and other directions, can solve the problems of high cost, no carbon molecular sieve, complex preparation method, etc., and achieves low price, simple preparation method, and preparation cost. low effect

Inactive Publication Date: 2004-02-04
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The thermal separation method has only been applied to a small amount of special raw materials so far, such as saran resin, polyvinylidene chloride, phenolic resin, etc., and the preparation method adopted is relatively complicated and the cost is relatively high
In further searches, there is no report on the preparation of carbon molecular sieves from apples or apple pomace

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Freeze-dry the apple pomace produced in the juicing industry, crush it into powder, sieve it with a vibrating sieve, take 500 grams of the part whose size is less than 63 μm, and spread it evenly on a carbon plate with a thickness of 1 cm. in a vacuum carbonization furnace. The temperature was raised to 800°C at a rate of 7.5°C / min, and carbonization was maintained for 1 hour. After natural cooling, 60 grams of the product were obtained. The specific surface area of ​​this product is 1215m 2 / g, the micropore volume is 0.41cm 3 / g, the average pore size is 9.9 Å. Its most dominant pore size is 6.2 Å.

Embodiment 2

[0018] Freeze-dry the apple pomace and crush it into powder, sieve it with a vibrating sieve, take 500 grams of a part with a size of 125-250 μm, spread it evenly on a carbon plate with a thickness of 3 cm, and put it in a vacuum carbonization furnace . The temperature was raised to 750°C at a rate of 5°C / min, and the carbonization was maintained for 1 hour. After natural cooling, 90 g of the product was obtained. The specific surface area of ​​this product is 781m 2 / g, the micropore volume is 0.23cm 3 / g, the average pore size is 7.9 Å. Its most dominant pore size is 6.5 Å.

Embodiment 3

[0020] Freeze-dry the apple pomace and crush it into powder, sieve it with a vibrating sieve, take 500 grams of the part with a size of 250-1000 μm, spread it evenly on a carbon plate with a thickness of 5 cm, and put it in a vacuum carbonization furnace . The temperature was raised to 850°C at a rate of 5°C / min, and carbonization was maintained for 1 hour. After natural cooling, 100 g of the product was obtained. The specific surface area of ​​this product is 527m 2 / g, the micropore volume is 0.20cm 3 / g, the average pore size is 7.8 Å. Its most dominant pore size is 6.5 Å.

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Abstract

A process for preparing carbon molecular sieve from apple dregs includes such steps as pretreating apple dregs, and carbonizing in vacuum carbonizer or atmosphere protected carbonizer. Its advantages are large specific surface area up to 1000 sq.m/g, high micropore uniformity, low cost and easy control.

Description

technical field [0001] The invention relates to a method for preparing carbon molecular sieves, in particular to a method for preparing carbon molecular sieves from apple pomace, and belongs to the field of carbon materials. Background technique [0002] my country's apple production is abundant, and a large number of apples rot every year due to the decoupling of supply and marketing, backward storage technology and apple deep processing. On the other hand, a large amount of apples are used for juicing, and a large amount of by-product-apple pomace has not been found suitable for processing. There are patent reports that apple pomace is used to produce fertilizers, and there are studies that use apple pomace as a raw material to prepare general activated carbon materials. In addition, there are no other research reports on the application of apple pomace. [0003] Carbon molecular sieve is a kind of carbonaceous porous material, which belongs to a kind of activated carbon....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C01B31/02C01B31/08
Inventor 赵斌元胡克鳌张荻
Owner SHANGHAI JIAO TONG UNIV
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