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A kind of preparation method and application of stepped hole tobacco rod carbon

A technology of stepped holes and tobacco rods, which is applied in the direction of carbon preparation/purification, application, tobacco, etc., can solve the problems of low yield of carbon products, equipment corrosion, etc., and achieve the effect of increasing yield and remarkable effect

Active Publication Date: 2019-01-08
ZHENGZHOU TOBACCO RES INST OF CNTC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN1669918A and Publication No. CN101648707A Because the use of alkali or acid is under high temperature conditions, the problem of corrosion to equipment is serious. In addition, the yield of carbon products is low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Place the tobacco rod raw materials in an oven at 60°C to dry to a moisture content of less than 5%, crush and siev the granular powder of 20-40 mesh, weigh 10g of the sample, according to the solid-liquid volume ratio of 1:15 and methanol aqueous solution (methanol concentration 5 %wt) was mixed and transferred to a ball mill tank, and 1.0 g of HY molecular sieve (10% of the weight of the tobacco rod) was added and mixed at room temperature at a speed of 300 rpm for 5 h to obtain a liquid. The material liquid was transferred to an autoclave, and ethylene gas was charged to the top of the reactor at room temperature to 0.2 MPa, and then the temperature was raised to 100°C and reacted for 24 h. The reaction solution was cooled to room temperature and transferred to a hydrothermal kettle for hydrothermal carbonization at 450°C for 24 h. Filter, soak the solid product in a 10 M NaOH solution at room temperature for 1 h, filter, and wash with deionized water to neutrality to...

Embodiment 2

[0026] Place the tobacco rod raw materials in an oven at 80℃ to dry until the moisture content is below 5%, crush to 40-60 mesh, weigh 10g of the sample, according to the volume ratio of solid to liquid 1:10 and ethanol aqueous solution (ethanol concentration 8%wt ) Mix and transfer to a ball mill tank, add 2.0 g of HZSM-5 molecular sieve (20% of the weight of the tobacco rod) and mix at room temperature at a ball mill speed of 400 rpm for 4 h. The material liquid was transferred to an autoclave, and the reactor was filled with butene gas to 0.5 MPa at room temperature, and reacted at 150°C for 14 h. The reaction solution was cooled to room temperature and transferred to a hydrothermal kettle for hydrothermal carbonization at 500°C for 15 h. Filter and soak the solid product in a 5 M KOH solution at 60°C for 3 h, filter, and wash with deionized water to neutrality, to obtain stepped pore carbon material 2#. The texture parameters and yield of the prepared carbon materials are ...

Embodiment 3

[0028] Place the tobacco rod raw material in an oven at 100℃ to dry to a moisture content of less than 5%, crush it to 60-90 mesh, weigh 10g of the sample, according to the solid-liquid volume ratio 1:5 with the propanol aqueous solution (propanol concentration 10%wt ) Mix and transfer to a ball mill tank, add SO 3 0.5 g of H-MCM-41 mesoporous material (5% of the weight of the tobacco rod) was mixed for 2 h at room temperature at a ball milling speed of 200 revolutions / min. The material liquid was transferred to an autoclave, filled with pentene gas to 1.0 MPa at room temperature, and reacted at 200°C for 24 h. The reaction solution was cooled to room temperature and transferred to a hydrothermal kettle for hydrothermal carbonization at 600°C for 5 h. Filter and soak the solid product in a 1 M NaOH solution at 80°C for 5 h, filter, and wash with deionized water to neutrality to obtain stepped porous carbon material 3#. The texture parameters and yield of the obtained carbon ma...

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PUM

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Abstract

The invention provides a preparation method of stepped-pore tobacco stalk carbon. The method is characterized in that a method is used for preparing a stepped-pore carbon material with tobacco stalks as raw materials and comprises the following steps that the tobacco stalks as the raw materials are subjected to partial hydrolysis in an alcohol-water solution environment in the presence of solid acid and alkene, then the temperature is increased for carbonization, and the stepped-pore tobacco stalk carbon material can be obtained after alkali washing and water washing. According to the stepped-pore carbon material prepared through the method, the pores of the material are distributed in micropore, mesoporous, macropore ranges, so that the stepped-pore carbon material is more suitable for absorbing cigarette tar wide in particle size distribution; when the prepared stepped-pore carbon material is added into a cigarette filter tip, the effect of reducing the tar in main stream smoke is obvious, and the reduction rate is 20% or above. The preparation method and application of the stepped-pore tobacco stalk carbon has the advantages that organic acid generated in the process that the solid acid catalyzes the hydrolysis of cellulose is reacted with alcohol to generate ester so that the problem that a reactor is corroded by the organic acid can be avoided. By the addition of the alkene, the solid acid easily catalyzes the hydrolysis of polysaccharide and the carbonization of a hydrolysis product, so that the yield of a carbon product obtained in the subsequent carbonization stage is increased.

Description

Technical field [0001] The invention relates to a preparation method and application of stepped pore tobacco stem carbon, in particular to a method for preparing high-porosity stepped pore activated carbon material by pulverizing tobacco stems and then undergoing catalytic hydrolysis and then carbonization. The material can be added to cigarette filters and has a significant effect on reducing smoke tar. Background technique [0002] my country is a major tobacco country in the world, and its planting area, total output, cigarette output and sales volume rank first in the world. A large amount of waste will inevitably be produced in the tobacco leaf and processing process. According to statistics, the tobacco stalk produced in 2015 alone reached 1.163×10 6 Ton. Due to the relatively poor availability of tobacco stalks, most of them are disposed of by burying, discarding or burning, and the comprehensive utilization rate is extremely low, which not only causes environmental pollu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B32/05A24D3/16
CPCA24D3/163C01P2006/12C01P2006/14C01P2006/17
Inventor 王金棒程多福高运谦孟庆华高健汪志波邓楠邱纪青刘亚丽洪群业郑路张仕华冯伟华郑新章
Owner ZHENGZHOU TOBACCO RES INST OF CNTC
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